SPECIFICATION FOR AIR HANDLING UNITS

Document Sample
SPECIFICATION FOR AIR HANDLING UNITS Powered By Docstoc
					TATA INSTITUTE OF FUNDAMENTAL RESEARCH
Homi Bhabha Road, Colaba, Mumbai 400 005.
A DEEMED UNIVERSITY
  HYPERLINK "http://www.tifr.res.in"       www.tifr.res.in .
Tel. : 22782316, Fax No. : 22804566 / 22804610 / 22804611
E-mail : HYPERLINK "mailto:psmurthy@tifr.res.in"          psmurthy@tifr.res.in
                                                              hate@tifr.res.in

Public Tender No.          :        TFR / PD / CA8 – 341 / PUB
Due Date                   :        06 / 02 / 2009
Cost of Tender             :        Rs. 500 / -

-------------------------------------------------------------------------------------------------------
Description of Materials

“Air Handling Units supply, installation, testing & commissioning of new Single Skin
AHUs along with associated ducting, insulation, piping , valves etc. including all
allied works as specified in the Tender Document.                 … 01 Job.
-------------------------------------------------------------------------------------------------------

Estimated Cost of work Rs. :                 30,00,000/-

Closing time and date :             13.00 Hours on 06.02.2009

Tender will be open at              :        14.00 Hours on 06.02.2009

Tender to be submitted within the due date and time.

Please see attached sheet for conditions of tender.


                                                                                 P. S. MURTHY
                                                      Purchase Officer




TATA INSTITUTE OF FUNDAMENTAL RESEARCH
Homi Bhabha Road, Colaba, Mumbai 400 005.


                                         TERMS AND CONDITIONS

Quotation must be submitted giving complete details: in particular, the offers should
clearly specify applicable taxes, make offered, warranty / guarantee terms, delivery
charges, if the price quoted is ex-works / ex-godown / ex-shop.
Tender Forms can be obtained from the Purchase Section on payment of the tender
fees ( non-refundable) of Rs. 500/- for each tender by Cash/Deamnd Draft in favour
of Tata Institute of Fundamental Research, Mumbai, to the Cashier, Accounts
Department, on any working day between 11.00 a.m. to 12.30 p.m. and 1.00 p.m. to
3.00 p.m.


The firm who wishes to download the specifications, terms and conditions may do so.
While submitting the quotation, a DD of Rs. 500/- for each tender drawn in favour of
Tata Institute of Fundamental Research, Mumbai may please be enclosed along with
Technical Bid only.

Quotations must be valid for a period of 90 days from the date of opening of the
tender.


Tenders shall be submitted in sealed envelope duly superscribed with the Technical
Bid Tender enquiry Number and the Due date addressed to the Purchase Officer, Tata
Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005 and
delivered at the Security Gate Office before 1300 hrs on the due date specified.
Tender will be opened in the presence of attending tenderers on the due date at 1400
hrs. on the same day.

Tender Document/Form is not transferable. Only the party who has purchased the
tender shall be entitled to quote.


Tenders containing corrections, overwriting will not be considered.

Tenders which do not comply with the above conditions are liable to be rejected.


If equipment offered is to be imported, arrangements for import will be made by us.

After Scrutiny of technical bids, Commercial Bid will be invited only from the short
listed
Venders.

The Institute shall be under no obligation to accept the lowest or any other tender
received in response to this tender notice and shall be entitled to reject any tender
without assigning any reason whatsoever.

We reserve the right to place the order for part/reduced quantity than what is specified
in the tender.

                                                                PURCHASE OFFICER




                           -1-              -1-           -1-
TATA INSTITUTE OF FUNDAMENTAL RESEARCH
Technical Services


TENDER DOCUMENT


Replacement of very old Air Handling Units with Supply, Installation, Testing &
Commissioning of New
Single Skin AHUs along with associated ducting, insulation, piping, valves etc. at
TIFR, Colaba, Mumbai




                         -2-             -2-           -2-
CONDITIONS OF TENDER



Quotations must be submitted in duplicate giving complete details; in particular, the
offers should clearly specify applicable taxes, make, offered, warranty/guarantee
terms, delivery period and delivery charges, if the price is ex-works/ex-Godown/ex-
shop.

Quotation should be valid for a period of 120 days from the date of opening of the
tender.

Tenders in sealed envelopes duly superscribed with the Tender No. and due date, shall
be addressed to the Purchase Officer, Tata Institute of Fundamental Research, Homi
Bhabha Road, Colaba, Mumbai – 400 005.

Tenders will be opened in the presence of attending tenderers on the date and time
specified in the enquiry; in the event the due date declared is a holiday, the tender will
be opened on the following working day.

This tender documents/form is not transferable.

Tenders containing erasures or alterations will not be considered.

Tenders which do not comply with the above conditions are liable to be rejected.

The Institute will not defray any expenses whatsoever incurred by the Bidders for the
preparation of bids.

9.      In case Bidder finds discrepancies or omissions from the specifications or
other documents or has any doubt as to their meaning, he shall at once request in
writing to the Purchase Officer, TIFR, who will for interpretation/clarification issue
interpretation and clarifications as he may consider necessary in writing as an
addendum. Copies of such addenda, if issued, shall be signed by the Bidder and shall
form a part of his bid. Verbal clarifications given shall not be binding on the Institute.

10.    Before submitting the bids, the Bidders shall make themselves fully
conversant with the technical specifications and other documents as attached so that
no ambiguity arises at a later date in this respect.


11.      The owner reserves the right to postpone the date of submission and opening
of bids.

12.    The bidders shall quote in English their rates/prices both in figures, as well as
in words against each item of the work as detailed in the enclosed Schedule of
Quantities. In the event of any discrepancy between the quoted rates/prices in words
and that quoted in figures, the rates/prices quoted in words shall govern.

13.     The bidders must return the complete set of bid document. Each page of the
bid document must be signed and dated by the bidder. Any bid not so signed and
dated is likely to be rejected. All writing shall be in ink only. Any corrections in the
entries in the Schedule of Quantities of this bid document, shall be initialed and dated
                           -3-              -3-           -3-
by the bidder before submission of the bid. No parts of the bid document shall be
altered, overwritten or amended by the Bidder

14.    The Institute shall be under no obligation to accept the lowest or any tender
received in response to this tender notice and shall be entitled to reject any tender
without assigning any reason whatsoever.




                          -4-              -4-           -4-
GENERAL CONDITIONS OF CONTRACT


Definition of Terms :

In construing these general conditions and the specifications the following works shall
have the meanings herein assigned to them unless there is something in the subject or
context inconsistent with such works.

The term `Contractor‟/`Supplier‟/`Bidder‟/`Vender‟ shall mean the Tenderer whose
tender has been accepted by the Owner and shall include the Tenderer‟s heirs,
successors and assignees approved by the Purchaser:

The `Purchaser‟ shall mean Tata Institute of Fundamental Research, Homi Bhabha
Road, Colaba, Mumbai – 400 005 and shall include the Purchaser‟s heirs, successors
and assignees.

The term `Sub-Contractor‟ shall mean the firm or persons named in the contract for
any part of the work or any person to whom any part of the work has been sublet with
the consent in writing of the Engineer-In-Charge and shall include his heirs,
successors and assignees approved by the Purchaser.

The Term `Inspector‟ shall mean any person appointed by/or on behalf of the
Purchaser to inspect supplies, stores or work under the contract or any person deputed
by the Inspector for the purpose.

The term `Particulars‟ shall mean, the following :

Specifications
Drawing
Sealed Pattern denoting a pattern sealed and signed by the Inspector.
Proprietary make denoting the produce of an individual firm.
Any other details governing the construction, manufacture and/or supply as existing
for the contract.

The term `Engineer‟ shall mean Engineer, Central Services, Tata Institute of
Fundamental Research, Colaba, Mumbai or some other person for the time being or
from time to time duly appointed in writing by the Owner to act as Engineer for the
purpose of the Contract or in default of such appointment the Purchaser.




                          -5-             -5-           -5-
The term `Specification‟ shall mean the specifications annexed to or issued with these
Conditions of Contract.

The term `Site‟ shall mean the place or places at which the Equipment is to be
delivered or work done by the Contractor shall include where applicable the lands and
buildings upon or in which the works are to be executed and shall also include the
place or places at which fabrication and other work is being carried out by the
Contractor.

`Electrical Equipment‟, `Stores‟, `Work‟ or `Works‟ shall mean and include
equipment and materials to be provided and work to be done by the Contractor under
the Contract.

The `Contract‟ shall mean acceptance of the work order placed on contractor/supplier
under section (2) of these conditions and shall include these conditions of Contract,
Specifications, Schedule, Drawing, Letter of Intent of the Purchaser and any
subsequent amendments mutually agreed upon.

`Tests on Completion‟ shall mean such tests are prescribed by the specifications or
have been mutually agreed to between the Contractor/Supplier and the Purchaser to be
made before the equipment is taken over by the Purchaser.

`Writing‟ shall include any manuscript, typewritten or printed statement under or over
signature or seal as the case may be. Words importing `person‟ shall include firms,
companies, corporations and association of individuals whether incorporate or not.

Words importing singular shall also include plural and vice versa where context
requires.

Contract:

Contractor/Supplier should send their acceptance letter on receipt of `Letter of Intent‟
or work order within stipulated period. On expiry of said period or exorbitant delay in
commencing or executing the work, the Purchaser shall not be liable to any claim
from the Contractor/ Supplier for work entrusted to and may revoke the contract.




                          -6-             -6-            -6-
Work at Site:

The contractor should ensure that his people follow safe practices at work.

Access to the works shall be allowed only to the Contractor/Supplier, Sub-Contractors
or his duly appointed representatives. The Contractor/ Supplier shall not object to the
execution of work by other contractors or tradesman and shall afford them every
facility for execution of their several works simultaneously with his own.

Work at the Purchaser‟s premises shall be carried out at such time as the Purchaser
may approve but the Purchaser shall give the Contractor/ Supplier all reasonable
facilities for the same. The Contractor/Supplier shall provide sufficient fencing,
notice boards etc. to guard the works and warn the public.

The Contractor shall obey Central, local and State regulations and enactment
pertaining to workmen and labour and the Engineer shall have the right to enquire into
and decide all complaints on such matters.

Delays:

The Contractor shall not be entitled to any compensation for any loss suffered by him
on account of delays in commencing or executing the work, whatever the cause for
such delays may be, including delays in procuring Government controlled or other
materials and delay in obtaining instructions and decisions from Engineer-In-Charge.
The Contractor shall, however, merit extension of time as hereinafter mentioned.

5.0     Taking Over:
        The equipment when erected at site shall be deemed to have been taken over
by the Purchaser when the Engineer will have certified in writing that the equipment
has fulfilled the contract conditions.




                          -7-             -7-           -7-
Extension of Time:

If the Contractor is delayed in the progress of work by changes ordered in the work,
or by any cause, which the Engineer shall decide to justify the delay, then the time of
completion shall be extended by a reasonable time. No such extension shall be
allowed unless requests for extension are made in writing by the Contractor/Supplier
to the Engineer within 15 days from the date of occurrence of the delay.

Other Damages:

The Contractor/Supplier shall be responsible for all injury to persons, animals or
things and for all damage to the works, structure of, and decorative work in the
property which may arise from operation or neglect of himself or any of his Sub-
Contractor or of his or Sub-Contractor‟s employees, whether such injury or damage
may arise from carelessness, accident or any other cause whatever in any way
connected with the carrying out of this contract. This clause shall be held to include
any damage to buildings, whether immediately adjacent or otherwise, any damage to
roads, streets, foot paths, as well as all damage caused to the works forming the
subject of this contract by frost or other inclemency of weather. The
Contractor/Supplier shall indemnify the Purchaser and hold him harmless in respect
of all and any expenses or property as aforesaid and also in respect of any claim made
in respect of injury or damage under any acts of Government or otherwise and also in
respect of any award of compensation or damages consequent upon such claim.

The Contractor/Supplier shall reinstate all damage of every sort mentioned in this
clause, so as to deliver up the whole of the contract works complete and perfect in
every respect and so as to make good or otherwise satisfy all claims for damage to the
property of third parties.

7.3     The Contractor/Supplier shall indemnify the Purchaser against all claims
which may be made against the Purchaser, by any member of the public or other
party, in respect of anything which may arise in respect of the works or in
consequence thereof and shall, at his own expense, effect and maintain, until the work
has been „taken over‟.




                          -8-              -8-           -8-
7.4     The Contractor/Supplier shall also indemnify the Purchaser against all claims
which may be made upon the Purchaser whether under the Workmen‟s Compensation
Act or any other statute in force during the currency of this contract or at common law
in respect of any employee of the Contractor/Supplier or of any of his sub-contractor
and shall at his own expense effect and maintain until the work has been `Taken
Over‟, with an approved office.

The Purchaser, with the concurrence of the Engineer, shall be at liberty and is hereby
empowered to deduct the amount of any damages compensation costs, charges and
expenses arising or accruing from or in respect of any such claims or damages from
any sums due to or become due to the Contractor/Supplier.




                          -9-             -9-           -9-
GENERAL INFORMATION TO BIDDERS

1.      On behalf of Tata Institute of Fundamental Research (hereinafter referred to as
the Institute) bids are invited for design, supply, installation, testing &
commissioning of Air- Conditioning system for INO Laboratory with associated
ducting, Insulation, refrigerant piping, cabling etc at TIFR on Homi Bhabha Road,
Navy Nagar, Colaba, Mumbai-400 005.

The Air-conditioning system shall be installed in stand alone Laboratory building.
The Laboratory building is situated near the Animal House. It is only a ground floor
structure.

It is important that the bidder must satisfy himself before quoting that the space
provided is adequate for installation of his plant along with all equipments and
accessories as no extra space can be provided. The tenderers must visit the site and
take the actual measurement before quoting. The bidders shall furnish a fully
dimensioned layout for his Package unit, with all equipment and accessories along
with quotation.

Bidder shall furnish the data called for in data sheets and the schedules in the standard
Proforma to facilitate correct evaluation of his bid in a most expeditious manner. It is
in the interest of the bidder to submit the bid in above manner with complete technical
details, failing which it is likely that his bid may not be considered.

Bidder shall be deemed to have carefully examined the specification in its complete
form and to have fully informed and satisfied himself as to the details, nature,
character and quantities of the work to be carried out, site conditions, and other
pertinent matters and details.

6.     It is the intent of the owner/purchaser to incorporate these specification
documents in the final contract order for the supply of material, equipment and
services. Bidders are required to review these documents and clearly state in their
proposals the acceptance of the same. Exceptions, if any shall be clearly stipulated in
appropriate bidding schedule. The final contract between purchaser and vendor shall
be subjected to such changes, if any, mutually agreed upon by purchaser and vendor
and included in the main text of the contract/order.

7.      Bidder shall clearly specify all the deviations with respect to this specification
in the appropriate schedule.


8.     SCHEDULE OF QUANTITIES TO BE FURNISHED BY VENDORS

8.1     All equipments mentioned in the enclosure should conform to the respective
technical specifications. Only main items of the tender have been brought out
specifically in this schedule, however all accessories as per specification or otherwise
should be furnished at the time of quotation with cost of individual item.

8.2     Tenderers are required to fill in unit rates for all the items mentioned in the
enclosure and any additional items quoted by them in the Financial Bid. In absence of
the unit rates, the offer may be considered as invalid.

8.3    All the equipments supplied shall be as per the „List of Approved Make‟
attached .

                         - 10 -            - 10 -          - 10 -
9.     ITEMS TO BE FURNISHED BY THE PURCHASER:

9.1    Following shall be furnished by the purchaser:

9.1.1 Building, foundations and trenches.

9.1.2 Water and power for testing and commissioning.

10.    SERVICES SUPPLIED BY PURCHASER DURING ERECTION:

       The purchaser will provide for the contractor following services during the
performance of work.

10.1 Temporary electric power at 415 V, 3 ph., 50 Hz at one point only which will
be within 50 M of location of works free of cost. Water shall be provided free of cost
for testing and commissioning.

10.2 The contractor shall make his own arrangement for supply, erection and
dismantling on completion of works of his temporary distribution system, distribution
panels and other equipments he may require to take the power from the purchaser's
supply points.

10.3 The contractor's temporary distribution system shall be subjected in every
respect to the approval of the purchaser and shall be arranged so as to avoid any
interference with other operations on the site.

10.4 The purchaser will not hold himself responsible for the consequences of any
interruptions to the continuity of the power supply or power system voltage and
frequency fluctuations.

10.5   The electric power shall not be used for heating purposes.

10.6 Electrical power made available to the contractor, during testing and
commissioning for the refrigeration unit is free of charge.

10.7 There is no EOT crane or mono rail to assist in erection work. Tenderer
should provide suitable derricks & tripods for lifting heavy load.

11.    SERVICE SUPPORT, SPARES & TOOLS:

11.1 The bidder shall provide in detail the Service Support Set-up in Mumbai of the
manufacturer or himself and lead time for replacement of faulty parts and for
providing technical service. The entire system will be on comprehensive AMC with
the supplier after the expiration of the guarantee period.

11.2 The tenderer shall furnish complete set of tools & wrenches for making
adjustments, repairs & preventive maintenance including those required for erection.

12     COMPLETION DRAWINGS (FINAL DRGS) & MANUALS:

12.1 The contractor shall submit tracings in original with five prints of all
installation drawings based on which equipments are installed & commissioned.

12.2   Contractor shall supply the following literature in four sets:

                        - 11 -            - 11 -          - 11 -
a.       Start-up, operation and maintenance instructions of Air-conditioning unit and
its parts.
b.       Installation instructions.
c.       Field wiring diagrams.
d.       Operation and Maintenance Manual of electrical parts used in the same.

.




                        - 12 -            - 12 -         - 12 -
INSTRUCTIONS TO BIDDERS & SPECIFIC
NON-TECHNICAL REQUIREMENTS


1.     The details in respect of Earnest Money, Security Deposit

       a)     Earnest Money Deposit:
       Bidder must deposit Rs. 60,000/- towards EMD along with the tender failing
which tender will be rejected. EMD will be accepted in the form of Bank Draft only
favouring Registrar, TIFR, Mumbai.

b)     Security Deposit:
5% (i.e. five percent) of the gross value of the work will be deducted from the
Contractor‟s bill towards Security Deposit.

c)     Refund of Security Deposit:
       The Security Deposit (5%) will be refunded to the contractor after the expiry
of defect liability period.

d)      Defect Liability Period:
12 (twelve) calendar months from the date of Institute‟s satisfactory completion
certificate will be taken as defect liability period.

e)     Bidders other than successful bidder will be refunded the EMD submitted by
them within 12 months from the date of opening of the tender and no interest shall be
paid against the said deposit.

f)    In case the successful bidder fails to undertake the said work, his EMD
amount will be forfeited.

g)    The EMD paid shall be part of Security Deposit, i.e. 5% of the Contract value
which will be refunded after expiry of Defects Liability period.

2.     No interest will be payable on the deductions towards Security Deposit/
Earnest Money.

3.     The Bidder shall submit the copy of their PAN card.




                        - 13 -            - 13 -         - 13 -
4.      Prices and rates quoted shall include cost of all materials, labour, plant,
equipment, temporary work, tools, setting out, supervision, transport, taxes, royalties,
octroi and any local tax or levy payable on all transactions, insurance and everything
necessary for due performance of work under this contract.

5.     Prices and unit rates shall be valid even if the contract is split.

6.      Contract should be fixed rate contract. No escalation in prices of the materials
during the currency of the contract is permitted. However any statutory variations
like change in excise duty, taxes etc. if levied after award of the work shall be paid on
production of proof of such changes. .

7.     a)     Site Visit:
       The bidders may like to visit the work site before submitting their bids to get
conversant with site conditions, which may affect the work.

b)     Location of Site:
       Tata Institute of Fundamental Research
       Navy Nagar, Colaba, Mumbai-400 005

8.     The work should be completed within 6 months from the date of issue of
Purchase Order.

9.     Work shall commence at site within 2 months from the date of issue of letter
of Purchase Order.

10.    The Contractor should plan and give his daily program for execution of work
in advance so that no disturbance is created in the routine working of the Institute.

11.     Turnover Tax/Works Contract Tax:
Turnover tax applicable to this contract shall be mentioned clearly and included by
the bidder in his bid. No claim shall be entertained by the owner thereafter.
12.     Date of Taking Over:
Site shall be deemed to have been taken over by owner when Engineer In-Charge
certifies the completion of work in all respect as per tender conditions and
specification.




                         - 14 -            - 14 -           - 14 -
13.     Income Tax as per the prevailing rates will be deducted from the progressive
bills.
14.     The contractor shall not without the consent in writing of the Owner assign or
sublet the contract.
15.     No labour below the age of 18 years shall be employed at site.
16.     Contractor shall be liable to pay workman compensation to his labour as per
prevailing rules for any accident occurring at our site.
17.     The contractor shall pay wages to his workmen as per the Statutory Minimum
Wages Act.
18.     The Contractor shall provide all risk insurance for his men, material and
machines and absolve us of all risk and liabilities whatsoever pertaining to his men,
material and machines.
19.     The Contractor will arrange for photo passes of his personnel and get the same
endorsed by our Establishment/Security Department before beginning the work.
20.     The Contractor will ensure that his workmen follow safe practices at Work.
21.     The Contractor will work from 8.00 a.m. to 6.00 p.m.
22.     No labour camp etc. will be allowed to be put up inside or in the vicinity of the
Institute.
23      Any dispute arising from this contract will be referred to two arbitrators one to
be appointed by you and one by us. The two arbitrators, in the event of their
disagreement will appoint an Umpire. The decision of the Umpire shall be final and
binding. The arbitration will proceed as per Indian Arbitration Act, 1940, as amended
up to date.
24.     The contractor should ensure that his engineer/supervisor is present at site
throughout the progress of works till completion.
25.     Terms of Payment:
        Payment of pipe lines shall be made as per unit length i.e. per running
mtr./feet.
Unless otherwise agreed to in writing between the Purchaser and the
Contractor/Supplier, payment for the delivery of the equipment approved by the
Inspector will be made as follows:
70% of the Contract value against delivery, prorata of the value
                of goods delivered and after checking the same at site.
15% on completion of erection.
10% on commissioning and final inspection and testing at site.
5% against PBG valid for 12 months from the date of handing over or after expiry of
the Defect Liability period as stated in Clause 1d) page 11.



26.     The bidder should submit technical data sheet, drawings, any other technical
detailed asked for in the tender with Part II i.e. Technical Bid of the Tender.
27.     The schedule of quantities and rates shall be read in conjunction with the
specification, tender drawings, other tender documents, relevant IS Codes,
Engineering hand books, etc. the Contractor shall not rely merely on the description
given in the Schedule of Quantities.

28.   The quantities mentioned in “Bill of Quantities” are estimated quantities.
However the payment shall be made as per actual quantities measured at site, after
completion of work.

29.     Contractor will be fully responsible for lifting, shifting and handling Institute‟s
properties such as any articles and materials lying nearby to proper place as instructed
by Site In-Charge.
                         - 15 -            - 15 -          - 15 -
30.     All the materials used shall be used only after approval and tests of the
Engineer-In-Charge as per specifications.
31.     All the debris shall be removed by the Contractor at his cost to any nearest
BMC approved dumping yard.
32.     Storage and custody of material, till the time of handing over to TIFR, shall be
the responsibility of contractor.
33.     The contractor after award of work, should submit detailed schedules showing
program and order in which contractor proposes to carryout the work with dates and
estimated completion time for various parts of work. This should be submitted in the
form of Bar-chart.
34.     The Engineer can instruct the contractor to make any alteration, omission, or
variation in work. The difference in cost due to instruction shall be added or deducted
from contract price as the case may be in accordance with the rate applicable in the
contract.
35.     DEVIATION FROM THE SPECIFICATIONS:
The Contractor must tender for the equipment as herein specified but may submit
alternate proposals for modifications to details where such modifications offer
technical advantages and will make cost savings to the owner. The basis and details
of calculations of operating cost and the net expected final saving shall be indicated
wherever such a claim is made. The acceptances or otherwise of alternate
proposal/deviations/ modifications etc. will be decided solely by the owner.

36.     Inspection of Material & Equipment:
        Supplier shall arrange for inspection/testing of AHUs at his works. TIFR will
have liberty to inspect/test the parts of AHUs during the manufacturing/assembly. No
charges will be paid extra towards inspection/testing. The bidder shall make necessary
arrangements for travel, boarding & lodging for 3 engineers of TIFR deputed for
inspection & testing of the AHUs at manufacturer‟s premises.




                        - 16 -            - 16 -         - 16 -
BASIS OF DESIGN & SCOPE OF WORK

 1.1   Design Parameters for selection of air handling unit & its components shall be:

       Maximum face velocity across prefilter        -      400 – 450 Ft./Min.
       Maximum face velocity across coils -          450 – 500 Ft./Min.
       Maximum fan outlet velocity         -         1600 Ft./Min.
       Maximum fan speed                   -         800 RPM
       Maximum fan motor speed             -         1500 RPM

Piping shall be sized for the following design parameter

Maximum flow velocity                        -       8 Ft./Sec.
                                                     = 2.5 Mtrs./Sec.
Maximum friction                             -       5 Ft. per 100 Ft. run

1.3    Design parameters for duct design shall be

       Max. flow velocity [S.A. Duct]                -        1200 Ft./min.
                                                              = 365 Mtr./min.

       Max. flow velocity [R.A. Duct]                -        800 Ft./min.
                                                              = 240 Mtrs./min.

       Max. friction drop                            -        0.1” WG/100 Ft. run
                                                              = 1 cm WG/100 M run

       Max. velocity at supply air diffusers -       500 Ft./Min.
                                                             = 150-200 Mt./Min.

2.0     The proposed new AHUs will be put after replacing the old AHUs, which are
in running position. The contractor shall have to carry out the work in short span of
time (during shut down), preferably during weekends including Sunday. The
contractors need to work day and night to ensure minimum disturbance to users.
3.0     The contractor should inspect the site before quoting and ascertain for himself
the nature, character and extent of work to be executed and should include all items
and services necessary, whether specially mentioned or not in the specifications,
scope etc. to meet with the intent and purpose of these specification.



4.0     After award of work contractor should submit the GA drawing as well as data
sheet of AHU, parts etc. for engineer‟s approval. He shall start the manufacturing only
after the approval.
All AHUs with the motor above 5 HP should use the flat type belt for transmission of
power (“Habasit-Iakoka” make flat belt only). Below 5 HP motor, a regular V-type
belt of Fenner make should be provided.
The static pressure & air flow rate mentioned in the tender are maximum for the
purpose of designing the components. However it is contractor‟s responsibility to
prove the airflow rate at the time of commissioning. He can use V belt pulley at initial
stage and later on replace with flat belt once system stabilizes.
During the replacement of AHU contractor shall cut/modify the existing header/coil
connection as per the new requirement. The new piping shall be paid on RMT basis as
per the tender rate. Similarly ducting connection includes cutting/modifying the
                        - 17 -            - 17 -           - 17 -
existing ducting including making new plenum, if necessary. The new ducting shall
be paid on Sqft basis as per tender rate.
The manufacturer of AHU should have the single space for assembly & testing of
AHU preferably at his work, where different section of AHU like casing, coil etc.
manufactured.
Supplier shall arrange for inspection/testing of AHU at his works. TIFR will have
liberty to inspect/test the parts of AHU during the manufacturing/assembly of AHU.
No charges will be paid extra towards inspection/testing. The bidder shall make
necessary arrangements for travel, boarding & lodging for 3 engineers of TIFR
deputed for inspection & testing of the AHUs at manufacturer‟s premises.
Ceiling suspended type AHU should have intermediate anti vibration device to stop
transmission of vibration to ceiling.
There are various sizes of insulated piping in the institute on which the layers of sand
cement plaster required. Bidder should quote his rate of sand cement plaster of
various sizes as per item no. 16 of BOQ.
Spare Motor with pulley shall be provided on extended shaft for Two AHUs (23500
CFM & 9000 CFM Catering to Pelletron Building)
Power supply shall be given by TIFR at AHU motor as per requirement but the
termination at motor end (With Copper Lugs) shall be in the scope of contractor.
Out of eight AHUs, 4 AHUs of Pelletron block, one AHU for `C‟ Block Mezzanine &
one AHU (ceiling suspended) of Pent House are to be replaced on one to one basis,
whereas the remaining two AHUs capacity have been changed. It is the responsibility
of successful bidder to prove the capacity of each AHU. Mere quoting on the basis of
tender will not absolve the successful bidder from proving the capacity of AHUs.

15.0 All welding must conform to the requirements of applicable IS standards. All
welding procedures and details shall be subject to the approval of Engineer In-Charge.
All necessary arrangements for working at heights above the floor level like
scaffolding, rope etc. shall be arranged by the Contractor. All materials, equipments,
tools & tackle, shifting and lifting arrangement and other necessary items required to
carry out the work shall be arranged by the Contractor. All other necessary
equipments, arrangements like welding machine, gas cutter, welding rods, drill bits,
drilling machine, grinder, gas cylinders for gas cutting etc. shall be arranged by the
Contractor. Electricity & water needed for carrying out the work shall be provided
free of cost by TIFR.

16.0 The Contractor shall make arrangements to store his tools, equipments etc. in
his own tool box having proper locking arrangements. Material required for carrying
out the work such as flanges, nuts and bolts, rubber gasket, pipes etc. shall be
provided by the Contractor. All the above material shall be of high standards and
subjected to the approval of the Engineer In-Charge.

17.0 The work shall be carried out with least disturbance to the users. The shut
down if any required for carrying out the works shall be minimum and advance
intimation to be given. Shut down periods will be intimated for the work to be taken
up after obtaining the necessary approval form the Users.

18.0 The Contractor shall inspect the site and ascertain for himself the nature and
extent of work to be executed and shall include all the items and services necessary
whether specifically mentioned or not in the tender specification, drawing, so as to
meet the intent and purpose of this specification.




                        - 18 -            - 18 -         - 18 -
TECHNICAL SPECIFICATIONS

1.     SCOPE :
The scope of this section comprises the supply, installation, testing and
commissioning of single skin air handling units of the size and capacity set forth in
the Schedule of Equipment.

CABINET TYPE:
2.1     The unit shall be of sectionalized construction consisting of Fan section, coil
section, Filter section and drain pan.

2.2     Metallic casing shall be fabricated from 16 Gauge galvanized sheet steel
ribbed and reinforced for structural strength and rigidity. 16 Gauge hot section
channels shall be used for reinforcing .It shall be sectionalized construction with
proper sealing at the joints to make the joints air tight. Fan section and panels with
bearing supports shall be reinforced with heavy gauge channels. For AHUs supported
on floor, leg packages shall be provided for attachment to the Fan and Filter sections,
raising the height by 350mm. All edges shall be formed inter locking to stiffen and
support the weight and shall be secured with galvanized nuts and bolts.

2.3     Fan impeller shall be of forward curved blade centrifugal type. Impeller shall
be of double width double inlet type. Two or three wheels shall be provided for each
AHU. Blower section (includes Scroll, impeller blades, etc.) shall be fabricated from
16 gauge galvanized sheet steel. Fan housing shall be made of die formed side sheets
with stream lined inlet and guide vanes to ensure smooth air flow into the fans. Fan
shaft shall be of solid cold rolled carbon steel, ground and polished. The whole
assembly shall be statically and dynamically balanced for smooth operation.
Fan shaft bearing shall be of heavy-duty type selected for an average operating life of
100,000 hours. Bearing shall be self-aligning type. They
shall be permanently lubricated. Bearing housing shall be fabricated from malleable
iron and suitably supported from outside.

 Fan motor shall be mounted on an adjustable sound isolating base located on the top
surface above the AHU.

2.4     Cooling Coils shall be of the fin and tube having Aluminum fins firmly
bonded to Copper tube (Seamless solid drain). Capacity of the coil shall be as
required under the Schedule of Equipment. Velocity of air across coil face shall not
exceed 500 CFM. Tube shall be of 5/8” O.D. and with 10-12 fins per inch. Coils
shall be tested at 300 psig Nitrogen pressure in presence of our engineers. Shut off
valve (Butterfly type) at the inlet and outlet of coil to be provided. Proper purging
and drain arrangement to be made on header of coil. Copper tube gauge




                         - 19 -           - 19 -          - 19 -
        thickness shall not be less than 20 SWG. Aluminum fins gauge shall not be
less than 32 G. Fin punching profile must follow full length air of contact with tube
and must be turned at edges to increase rigidity and contact.

Drain pan shall be constructed of 18 G stainless steel with sandwich type insulation
in-between bottom plates. Necessary support shall be provided to slide the coil in the
drain pan. Outlet shall be provided on both the side of drain pan. An extension drip
pan shall be provided at proper location outside the casing to catch all drip from
external coil connections and valves.
End panel of the coil section casing shall be removable for withdraw of the coil and
shall be provided with opening for coil connections.

2.5     Filters shall be cleanable viscous metal AL box type and shall be 50 mm thick.
The filter shall be hold with stiffeners in-between made out of hollow SS material.

2.6     Suitable, easily openable service door (for Internal Maintenance) between coil
section and fan section to be provided to enable a person to enter inside

2.7    Unit shall be thermally and sound insulated as in section “Insulation”

2.8     Spring type Anti Vibration Mounting of approved make shall be provided as
vibration isolators.

2.9     Sheet metal fresh air louvers with frame, damper, etc. shall be provided in the
clear opening in masonry made by the owner.

2.10 The Unit cost shall be complete with all accessories, including the following:
1] Manual air vents at high point and drain at low point. 2] Water
Thermometers at Inlet & Outlet.3] Pressure gauges with siphon cocks
at Inlet & Outlet. 4) Canvass Connection

3.      PERFORMANCE DATA & TESTING:
Air handling units shall be selected for the lowest operating noise level of the
equipment for performance rating and power consumption data with operating
points(On Fan Curve) clearly indicated shall be submitted with the tenders and
verified at the time of testing and commissioning . The following test result shall be
furnished during commissioning in the presence of department‟s Engineer;

a) Air Side
Air Flow Rate in CFM or Cub.M per hour
Static pressure in mm wg
Entering Dry bulb & Wet bulb temperature
Leaving Dry bulb & Wet bulb temperature


b) Water Side
Inlet temperature in degree C
Outlet temperature in degree C
Pressure drop in psig

PAINTING:
Unit shall be painted with approved type of Epoxy paint (minimum two coats)

CODES & STANDARDS FOR AIR HANDLING UNIT:

                         - 20 -           - 20 -          - 20 -
        The design, manufacture and performance of AHU shall comply all currently
applicable statutes, regulations and safety codes in the locality where the equipment
will be installed. The equipment shall also conform to the requirements of the latest
editions of applicable Indian/U.S.A. standards. Nothing in this specification shall be
construed to relieve the vendor of this responsibility. In particular the equipment shall
conform to the latest editions of the following standards:

a)     ANSI 89.1       Safety code for mechanical refrigeration.
b)     IS:659          Safety code for air-conditioning.
c)     IS:660          Safety code for mechanical refrigeration.
d)     AHRAE           Standard-33 methods of testing for rating forced
                       Circulation air-cooling and air heating coils.
e)     ARI-410         Standard for forced circulation air cooling and air
                       Heating coils.

       G.I. insulated condensate drain piping with drain valve, upto sump or floor
drain within the air handling unit room. The drain shall be provided with proper „U‟
loop. Only piping and valve shall be measured and paid at unit rate.

PERFORMANCE DATA:
        Air handling units shall be selected for the lowest operating noise level of the
equipment. Fan performance rating and power consumption data with operating
points clearly indicated shall be submitted with the tenders and verified at the time of
testing and commissioning of AHU.




                         - 21 -           - 21 -          - 21 -
       SHEET METAL WORK

1.0    SCOPE:

1.1    The scope of this section comprises the supply and installation of all sheet
metal ducts.

1.2    MATERIAL:

1.2.1 Ducts shall be made of galvanized steel sheets. The galvanized steel sheets
shall conform to IS 277-1965 with 200gsm Zink coating.

The thickness of sheets shall be as given below:

Dimensions      Gauge         Gauge           Type of Joints        Type of Bracings
of ducts        G.I.           Al

Upto 600       24        22        G.I. Flange at Cross bracings.
                                   2.5 centre

601 to 750     24        22        25 x 25 x 3 mm        25 x 25 x 3 mm MS
                                   Angle iron frame      angles bracing at 1500
                                   With 6 mm dia.        mm from joints
                                   Nuts & bolts

751 to 1000         22         20        25 x 25 x 3 mm 25 x 25 x 3 mm MS
                               Angle iron frame      angles bracing at 1500
                               With 6 mm dia.        mm from joints
                               Nuts & bolts

1001 to 1500 22          20        40 x 40 x 5 mm        40 x 40 x 3 mm MS
                                   Angle iron frame      angles bracing at 1500
                                   With 8 mm dia.        mm from joints
                                   Nuts & bolts

1501 to 2250 20          16        50 x 50 x 3 mm     40 x 40 x 3 mm MS
                                   Angle iron to be   angle bracing at
                                   Cross braced 1200 mm from joints
                                   diagonally with    or 40 x 40 x 3 mm MS
                                    10 mm dia. nuts   angle diagonal bracing
                                   and bolts at 125
                                   centre.

2250 & above 18          14        50 x 50 x 6 mm         50 x 50 x 3 mm MS
                                   Angle iron 10 angle bracing at
                                   mm dia. nuts 1200 mm from joints
                                   and bolts at 125       or 50 x 50 x 3 mm MS
                                   centre. angle diagonal bracing




HANGERS FOR DUCT:

                          - 22 -              - 22 -           - 22 -
Duct Size      Spacing            Size of MS equal angle      Size of rod dia
 [mm]            [M]                         [mm x mm]                     [mm]

Upto 750         2.5                           40 x 3                       10

751 to 1500      2.0                           40 x 3                       12

1501 to 2250     2.0                           50 x 3                       15

2251 to above 2.0                              50 x 3                       15

All the MS angle, use for duct support & brazing etc, shall be hot dip galvanized

DAMPERS:

1.3.1 All dampers shall be louver dampers of robust construction & tightly fitted.
The design, method of handling and control, shall be suitable for the location and
service required.

Dampers shall be provided with suitable links, louvers and quadrants as required for
their proper operation, control or setting in any desired position. Dampers & their
operating devices shall be made robust, easily operable and accessible through
suitable access doors in the ducts. Every damper shall have an indicating device
clearly showing the damper position at all times.

1.3.3 Dampers shall be placed in ducts & on main supply or return air duct for the
proper volume control and balancing the system.

1.4    GRILLS & DIFFUSERS:

1.4.1 All side wall supply air grills shall be similar and equal to Tuttle and Bailey
Triflox T 647 double deflection register with approved damper. Supply air grills shall
be provided with vertical and horizontal adjustable bars and volume control multi-
louver damper that shall be key operated from the front of the grills.

1.4.2 All return air grilles shall be similar & equal to Tuttle & Bailey Aerovane
770D grills.




1.5    INSTALLATIONS:

1.5.1 The duct fabrication & installation shall generally conform to I.S. 655-1963.

1.5.2 The contractor shall provide and neatly erect all sheet metal work or as may be
required to carry out the intent of these specifications and this shall meet with the
approval of the Engineer in all its parts and details.


                         - 23 -             - 23 -         - 23 -
1.5.3 All necessary allowances and provisions shall be made by the contractor for
beams, pipes or other obstructions in the building. Where necessary to avoid beams
or other structural work or plumbing or other pipes or conduits the ducts shall be
transformed, divided or curved to one side, as approved or directed by the Engineer.

1.5.4 All metal work in dead or furred down spaces shall be erected in time to cause
no delay to other contractors in the building.

1.5.5 Ducting over furred ceiling shall be supported from the slab above, or from
beams. In no case shall a duct be supported from the ceiling hangers or be permitted
to rest on a hung ceiling.

1.5.6 If a duct cannot be run as decided, the Contractor shall install the duct between
the required point by any path available, subject to the approval of the Engineer.

1.5.7 All ducts shall be rigid and shall be adequately supported and braced where
required with standing beams, tees or angles of ample size to keep the ducts true to
shape and to prevent buckling, vibration or breathing.

1.5.8 All joints shall be made tight and all interior surfaces shall be smooth. Bends
shall be made with radius not less than ½ the width of the duct or with scientifically
designed interior curved vanes, as approved. The vanes shall be so spaced that the
aspect ratio of each of the individual elbow formed by the vanes will be about five.

1.5.9 All sheet metal connections, partitions & plenums required to confine the flow
of air to and through the filters and fans, shall be constructed of 18 G galvanized Iron,
thoroughly stiffened with 1” x 1” angle Iron braces and fitted with all necessary doors
as required by the Engineer, to give access to all parts of the apparatus. Doors shall
be not less than 18” x 20” in size.

1.5.10 Where metal ducts or sleeves terminate in wood work, brick or masonry
openings, tight joints shall be made by means of closely fitted heavy flanged collars.




1.5.11 Air handling units shall be connected to duct work by inserting at air inlet and
air outlet a double canvas sleeve. Each sleeve shall be minimum 4” long securely
bonded and bolted to duct and units. Each sleeve shall be made smooth and the
connecting duct work rigidly held in line with unit inlet or outlet.

1.6    INSULATION:

1.0    SCOPE:

1.1     The scope of this section comprises the supply and application of insulation as
herein specified.

2.0    COLD INSULATION:

2.1     All pipes, ducts & equipments operating at temperature lower than the ambient
shall be insulated in the manner specified hereinafter.

                         - 24 -           - 24 -          - 24 -
2.2     The insulating material shall be as follows:

Pipes:
Rigid preformed sections of expanded polystyrene of uniform density of 24 Kgs./m3
with a `K‟ value of not more than 0.23 B.T.U/ Hr./In/Sq.ft./0F at 500F mean
temperature.

No insulation shall be applied on pipes until the pipes are satisfactorily tested.

        Thickness of pipe insulation shall be 50mm.

Pipe insulation shall be applied as follows:
  a) Pipes shall be thoroughly cleaned with wire brush and rendered free from all
rust and grease.

  b)    Two coats of bitumen shall be applied on the cleaned pipe surface.

  c) Rigid pipe sections of insulation shall be fixed tightly to the surface taking
care to seal all joints and covered with Polythene sheet.

  d) 24 G x 20 mm mesh wire netting shall be applied, butting all joints and shall
be laced down with G.I. wire.

Insulated surface shall be finished with two layers of sand cement plaster. Each layer
shall be not less than 7 mm thick.

2.5    All valves, fittings, strainers etc. in chilled water piping shall be insulated to
the same thickness as specified for the main run of piping. Valve bonnets, yokes and
spindles shall be insulated in such a manner as not to cause damage to insulation
when the valve is used or serviced.

2.6    Cabinet air handling units shall be insulated as follows.
       Fans & coil section panels shall be internally lined with fire retardant quality
25 mm thick, 24 Kgs./m3       density thermocole slab (with black pigmented
neoprene coating).

        The insulation should be stuck to the body of AHU without making any hole
in the body.

2.7    Ducts shall be insulated as follows:
       ----------------------------------------------------------------------------------------------
          Type                            Location                               Insulation
       ----------------------------------------------------------------------------------------------
   a) Supply duct                 unconditioned space 50 mm, 24 kg/m3 density
                                                                      TF quality, thermocole
                                                                      slab.
   b) Supply duct                 conditioned space                   25 mm, 24 kg/m3 density
                                                                      TF quality, thermocole
                                                                      Slab.
   c) Return duct or unconditioned space 25 mm, 24 kg/m3 density
       plenum                                                TF quality, thermocole
                                                                      slab.
       ====================================================
Contractor shall submit the Insulation material test certificate clearly showing density,
K value, lot ,etc of material.
                            - 25 -              - 25 -            - 25 -
Duct insulation shall be applied as follows:
a)      Black bitumen paint shall be applied over the surface after cleaning the ducts.
24 kg/m3 density thermocole slab insulation of specified thickness shall be put by
using Bitumen uniformly over Insulation surface.
The Thermocol Insulation shall be covered with 40 G AL foil. Al foil should be
wrapped on Thermocole uniformly, using Bitumen.
The Joints of AL foil shall be overlapped at least 75mm covered with AL tape.
Stripping should be done at distance of 1 meter to hold the insulation, wherever
required.
Wherever necessary and particularly in larger duct, strapping with PVC material
should be done after thermocol insulation and before putting AL foil

2.9    Acoustic Insulation of Duct:-
The acoustic Insulation shall be done with 48 Kg/cu.m.Density,25mm
thick Resin bonded Fibre Glass.



The duct surface shall be cleaned and hot bitumen applied in patches
and resin bonded glass wool cut to appropriate sizes and stuck to the
duct wall. The insulated face shall be covered with RP tissue papers & perforated AL
sheet of 28 Gage thickness having 3mm perforations at 5mm staggered centre and
held in position with rivets or galvanized steel bolt with counter sunk heads & 50 x
50 x 2 mm plate washers at not more than 600mm centers.

1.7    PIPING

1.0      SCOPE:
         The scope of this section comprises the supply & laying of all pipes required
for this project. On the award of the contract, the tenderer shall prepare his own
detailed working drawings.

2.0    CHILLED WATER PIPING:

2.1     All chilled water piping and fittings shall be of M.S. Class `C‟ (heavy class) of
TATA/Jindal make only. The pipe confirming to BIS 1239 for pipe size upto 150 mm
dia. and for pipe size 200 mm dia. and above shall be as per BIS 3589 having
minimum 6 mm thickness. All joining in piping shall generally be by welding unless
otherwise mentioned or as directed at site. All welding shall be done by qualified
welders and shall strictly confirm to Indian Standard code of procedure for manual
metallic welding of mild steel as per BIS 823.
2.2     The piping shall be so designed that the water velocity through the piping shall
not exceeds maximum 8 fps and also the piping friction drop shall be limited to 4 m
per hundred meter of pipe length.
Pipe threads shall be of I.S. 554/1955 and flanges of I.S. 1536/1960.. Pipes shall be
sloping towards drain points.

2.3    Fittings shall be new and from standard manufacturers. Fittings shall be
malleable casting of pressure ratings suitable for the piping system. Fittings used on
welded piping shall be of the weldable type. Flanges shall be new and from standard
manufacturers. Supply of flanges shall include bolts, washers etc. as required.

2.4   Tee-off connections shall be through reducing tees, wherever possible.
Otherwise ferrules welded to the main pipe shall be used.
                         - 26 -           - 26 -          - 26 -
2.5     All equipment and valve connections or connections to any other mating
pipes, shall be through unions/screwed flanges upto 50 mm dia. And flanges (welded
or screwed for G.S.) for larger diameters or as required for the mating connection.

2.6   All welded piping is subject to the approval of the Engineer and sufficient
number of flanges and unions shall be provided as required under.

2.7     All the drain piping shall be of G.I. „C‟ class of TATA/Jindal make with the
Insulation as specified in the „Insulation‟

2.8     Gate valves shall be provided conforming to the following specifications.

        ----------------------------------------------------------------------------------------------
        Size                       Construction                                 Ends
        ----------------------------------------------------------------------------------------------
        12 to 65 mm                Gun metal                                    Screwed female

        65 mm & over         a) Body - Cast Iron                                Flanged
                              b) Spindle, valves seat,
                                 Wedge, nut etc. – Bronze or
                                                   Gun Metal
        ===================================================

Valves shall conform to I.S. 780/1963 & flanges to I.S. 1536/1960 or as required.
Valves shall have non rising spindles unless otherwise specified and shall be suitable
for 300 psig test pressure. The valve shall be of Leader make. Tail pieces shall be
used wherever required.

2.9     Butterfly valves shall perform the function of isolating valves. Butterfly
valves shall have cast iron body with Nitrile rubber bonded bakelite hard back seat.
Disc shall be of high duty iron with epoxy coating on nickel plating. All butterfly
valves shall be provided with locking devices. The shaft shall be stainless steel AISI
410. The valve shall be Audco make only.

3.0     PIPING INSTALLATION:

3.1     Pipe runs and sizes should to meet the site conditions. The contractor on the
award of the work shall prepare detailed working drawings, showing the cross section,
longitudinal sections, details of fittings, locations of isolating, drain and air valves etc.
They must keep in view the specific openings in buildings and other structures
through which the pipes are designed to pass.

3.2    Piping shall be properly supported on or suspended from strands, clamps,
hangers etc. as specified and as required. The tenderer shall adequately design all the
brackets, saddles, clamps, hangers etc. and be responsible for their structural integrity.

3.3    Pipe supports shall be of steel, adjustable for height and prime coated with rust
preventive paint and finish coated black. Where pipe and clamp are of dissimilar
material, a gasket shall be provided in between.

Spacing of pipe supports shall not exceed the following:
       Pipe (mm)                                    Sapcing (Meters)
       3 to 12                                      1.22
       19 to 25                                     1.83
                            - 27 -              - 27 -             - 27 -
       32 to 150                                      2.44
       150 and above                          3.05

       Pipe hangers shall be fixed on walls and ceilings by means of metallic rawl
plugs or approved shear fasteners.

3.4    Vertical risers shall be parallel to wall and column lines and shall be straight
and plump. Risers passing from floor to floor shall be supported at each floor by
clamps or collars attached to pipe and with a 12 mm thick rubber pad or any resilient
material. Where pipes pass through the terrace floor, suitable flashing shall be
provided to prevent water leakage. Risers shall also have a suitable elbow or concrete
pipe support at the lowest point.

3.5    Pipe sleeves of 50 mm diameter shall be provided wherever pipes pass through
walls and the annular space filled with felt and finished with retaining rings.

3.6    Insulated piping shall be supported in such a manner as not to put undue
pressure on the insulation.

Cut-outs required in the floor slabs for taking the various pipes are provided.
Tenderers shall carefully examine the cutouts provided and clearly point out wherever
the cutouts do not meet with the requirements.

3.8     Piping work shall be carried out with minimum disturbance to the other work
on the site. A program of work shall be chalked out in consultation with the Engineer.

3.9    All pipes using screwed fittings shall be accurately cut to the required sizes
and threaded in accordance with I.S. 554/1955 and burrs removed before laying.
Open ends of the piping shall be blocked as the pipe is installed to avoid entrance of
foreign matter. Wherever reducers are to be made in horizontal runs, eccentric
reducers shall be used if the piping is to drain freely; in other locations, concentric
reducers may be used.

3.10 Drains shall be provided at all low points in the piping system and shall be of
the following sizes:

               Mains                                                  Drain

       Upto 300 mm                                            25 mm
       Over 300 mm                                                    40 mm

       Drains shall be provided with gate valves of equal size with rising spindle.
Drains shall be piped through equal size G.I. pipe to the nearest drain or floor waste.
Piping shall be pitched towards drain points.



4.0    PRESSURE GAUGES:

4.1     The pressure gauges shall be Bourbon tube type confirming to IS : 3624 and
shall be with siphon cock and angle valve. Pressure gauges shall be not less than 150
mm dia. and of appropriate range etc. duly calibrated before installation. The Pressure
gauges shall be of H.GURU/equ. make.
4.2     Care shall be taken to protect pressure gauges during pressure testing.

                         - 28 -           - 28 -          - 28 -
5.0     THERMOMETERS:

5.1     Thermometers shall be either 150 mm dia. dial or direct reading industrial
type, of appropriate range, duly calibrated before installation. Thermometers shall be
installed in separable wells.

6.0     INSULATION:

6.1   Pipes shall be insulated in accordance with specifications in section
`INSULATION‟.

7.0     VIBRATION ELIMINATION:

7.1   Piping installation shall be carried out with vibration elimination fittings
wherever required.

8.0     TESTING:

8.1      All piping shall be tested to hydrostatic test pressure of at least 1½ times the
maximum operating pressure, but not less that 7 Kgs/Sq.Cm. for a period of not less
than 24 hours. All leaks and defects in joints revealed during the testing shall be
rectified to the satisfaction of the Engineer.
8.2      Piping repaired subsequent to the above pressure test shall be retested in the
same manner.
8.3      System may be tested in sections and such sections shall be securely capped.
8.4      The owner shall be notified well in advance by the Contractor of his intention
to test a section or sections of piping and all testing shall be witnessed by the Engineer
or his authorized representative.
8.5      The contractor shall provide all materials, tools, equipment, instruments,
services and labour required to perform the test and to remove water resulting from
cleaning and/after testing.
 8.6 The contractor shall make sure that proper noiseless circulation of fluid is
achieved through all coils and other heat exchanger in the system concerned. If
proper circulation is not achieved due to air bound connections, the Contractor shall
rectify the defective connections. He shall bear all the expenses for carrying out the
above rectifications, including the tearing up and re-finishing of floors, walls, etc. as
required.


8.6    No insulation shall be applied to piping until after the completion of the
pressure testing to the satisfaction of the Engineer.

9.0     PAINTING:

9.1     After all the piping has been installed, tested and run for at least 10 days of
eight hours each, the piping shall be given two finish coats, as follows:
        ----------------------------------------------------------------------------------------------
        Service                    Flow                                Colour
        ----------------------------------------------------------------------------------------------
        Chilled water              supply return as approved by the
                                                                       Engineer
        ====================================================

9.2     The direction of flow of fluid in the pipe shall be visibly marked in White
arrows.
                             - 29 -              - 29 -            - 29 -
1.8     ELECTRICAL EQUIPMENT

1.0    SCOPE:

The scope of this section comprises the supply & installation of all electrical
equipment, such as, electrical motors

2.0    RATINGS & STANDARDS:

2.1     Rating of the motors shall be as indicated by you in the data sheets and as per
the requirements of the airflow and static pressure. Ratings shall be on the basis of the
specified ambient temperature and without exceeding the maximum temperature
limits set by IS 325/1961.

2.2     Unless otherwise stated, Indian Standard Specifications shall apply. Where
I.S. specifications are not available, the relevant British Standard Specifications shall
be followed.

3.0    SQUIRREL CAGE INDUCTION MOTORS:

3.1     All motors shall be screen protected drip proof type TEFC with Class-C
insulation, conforming to I.S. 325/1961 unless otherwise specified.

3.2    The motor shall be statically and dynamically balanced.

3.3    Bearings shall be combination ball and roller type with limit lubricators.

3.4    Termination shall be of ample size housed in a termination box . The terminal
box shall be suitable for cable entry. Two earth terminals shall be provided.

3.5     The starting torque shall match with the load torque and the starting current
shall not exceed 6 times the full load current.

4.0    INSTALLATION:

4.1     All motors shall be mounted on a common foundation with the driven
equipment coupled through flexible couplings or through belt drive. Installation shall
be in accordance with I.S. 900/1956.

4.2     Flexible connections shall be provided to all motors terminals wherever the
motor is mounted on guide rails and belt drive is adopted. Even in the case of direct
drive motors, the connections shall be flexible enough to prevent transmission of
vibration.

4.3    All drive arrangements and couplings shall be provided with a safety guard.

5.0    TESTING:

5.1    Motors shall be tested in accordance with the relevant Indian Standard
Specifications and test certificates furnished for routine type and high voltage tests.

6.0    PAINTING:


                         - 30 -            - 30 -          - 30 -
6.1     All motors, starters and the frame work shall be painted with two coats of a
suitable paint of approved colour.




                        - 31 -            - 31 -         - 31 -
Schedule of Technical Data for each Air Handling Unit
(To be submitted for each AHU separately)


       Technical data shall be furnished as below:


General:
Make:-
Air Discharge Direction:- Horizontal or Vertical
Overall Dimensions:-
Weight (including water):-
Type of Vibration Isolators:-
Approx. noise level (db):-
Drive belts & size (Flat, Belt, V-Belt):-
G.I. Casing Gauge:-
AHU body insulation material & thickness:-
Density of insulation material :-
Drain Tray Material :-
Drain tray insulating material & thickness:-
Whether inspection door provided for AHU body:-

Fan Section:
Air handling capacity (CFM/CMH):-
Total static press (mm WG):-
Fan speed (r.p.m.):-
Nos. of Fan outlet & area:-
Fan diameter:-
Balance (Static and/or Dynamic):-
Bearings:-
Make & Mode of Fan.




                       - 32 -           - 32 -          - 32 -
Filter Section:
Type:-
Gross filter area:-
Velocity through filter (F.P.M.):-
Press drop through filter when new (mm, W.G.):-
Efficiency:-
Filter material:-
Filter Casing Material & Gauge

Cooling Coil:
Coil fin material & thickness:-
Copper tube diameter & thickness:-
Water through coil (F.P.M.):-
No. of fins per inch:-
Water press drop in the coil (psig):-
coil Face area :-
Nos. of coils:-
No. of rows of each coil:-

Drive Motor for AHU:
Make:-
Frame size:-
Insulation Class:-
HP/KW rating:-
Type

VALVES
1.  Butterfly Valve
1]  Make :-
2]  Model :-
2.  Gate Valve
1]  Make :-
2]  Model :-




                         - 33 -         - 33 -    - 33 -
Gauges

1.       Pressure Gauge

         1)     Make:-
         2)     Type:-

2.       Thermometers

         1)     Make:-
         2)     Type:-

VIII) Miscellaneous

1.       Insulation (Duct/Piping)
         1)      Make:-
         2)      Thickness & Density:-

2.       Piping
         1)     Make
         2)     Class of Pipe

3.       Ducting Sheet
         1)     Make of Sheet

4.       Anti Vibration Mounting
         1)     Type
         2)     Make

Note: Any other additional technical details may be included by the tenderer.




                          - 34 -         - 34 -         - 34 -
ACCEPTABLE/APPROVED MAKE OF MATERIALS


      Material                                  Make


1.    Galvanized Plane Sheets      Jindal/SAIL
2.    Pipes Tata/Jindal
3.    Butterfly Valve/Ball Valve AUDCO
4.    Gate Valve Leader
5.    Globe Valve Leader/AUDCO
6.    „Y‟/Plot Strainer     TrishuL/Emerald
7.    Non Return Valve      AUDCO/C&R
8.    GaugesH Guru/Star Scientific
9.    Thermometers H Guru/Star Scientific
10.   Pipe Insulation       Beardsell/Lloyds/
              Phenotherm
11.   Duty Insulation       Owens Corning/Beardsell/
              U P Twiga
12.   Electrical Motor      Siemens/Crompton/ABB

13.   Anti Vibration Maintenance RMS Corporation/Dunlop




                     - 35 -          - 35 -            - 35 -
TATA INSTITUTE OF FUNDAMENTAL RESEARCH
Technical Services


TENDER DOCUMENT


Replacement of very old Air Handling Units with Supply, Installation, Testing &
Commissioning of New
Single Skin AHUs along with associated ducting, insulation, piping, valves etc. at
TIFR, Colaba, Mumbai




                        - 36 -          - 36 -         - 36 -
CONDITIONS OF TENDER



Quotations must be submitted in duplicate giving complete details; in particular, the
offers should clearly specify applicable taxes, make, offered, warranty/guarantee
terms, delivery period and delivery charges, if the price is ex-works/ex-Godown/ex-
shop.

Quotation should be valid for a period of 120 days from the date of opening of the
tender.

Tenders in sealed envelopes duly superscribed with the Tender No. and due date, shall
be addressed to the Purchase Officer, Tata Institute of Fundamental Research, Homi
Bhabha Road, Colaba, Mumbai – 400 005.

Tenders will be opened in the presence of attending tenderers on the date and time
specified in the enquiry; in the event the due date declared is a holiday, the tender will
be opened on the following working day.

This tender documents/form is not transferable.

Tenders containing erasures or alterations will not be considered.

Tenders which do not comply with the above conditions are liable to be rejected.

The Institute will not defray any expenses whatsoever incurred by the Bidders for the
preparation of bids.

9.      In case Bidder finds discrepancies or omissions from the specifications or
other documents or has any doubt as to their meaning, he shall at once request in
writing to the Purchase Officer, TIFR, who will for interpretation/clarification issue
interpretation and clarifications as he may consider necessary in writing as an
addendum. Copies of such addenda, if issued, shall be signed by the Bidder and shall
form a part of his bid. Verbal clarifications given shall not be binding on the Institute.

10.    Before submitting the bids, the Bidders shall make themselves fully
conversant with the technical specifications and other documents as attached so that
no ambiguity arises at a later date in this respect.


11.     The owner reserves the right to postpone the date of submission and opening
of bids.

12.    The bidders shall quote in English their rates/prices both in figures, as well as
in words against each item of the work as detailed in the enclosed Schedule of
Quantities. In the event of any discrepancy between the quoted rates/prices in words
and that quoted in figures, the rates/prices quoted in words shall govern.

13.     The bidders must return the complete set of bid document. Each page of the
bid document must be signed and dated by the bidder. Any bid not so signed and
dated is likely to be rejected. All writing shall be in ink only. Any corrections in the
entries in the Schedule of Quantities of this bid document, shall be initialed and dated
                         - 37 -            - 37 -          - 37 -
by the bidder before submission of the bid. No parts of the bid document shall be
altered, overwritten or amended by the Bidder

14.    The Institute shall be under no obligation to accept the lowest or any tender
received in response to this tender notice and shall be entitled to reject any tender
without assigning any reason whatsoever.




                         - 38 -           - 38 -          - 38 -
GENERAL CONDITIONS OF CONTRACT


Definition of Terms :

In construing these general conditions and the specifications the following works shall
have the meanings herein assigned to them unless there is something in the subject or
context inconsistent with such works.

The term `Contractor‟/`Supplier‟/`Bidder‟/`Vender‟ shall mean the Tenderer whose
tender has been accepted by the Owner and shall include the Tenderer‟s heirs,
successors and assignees approved by the Purchaser:

The `Purchaser‟ shall mean Tata Institute of Fundamental Research, Homi Bhabha
Road, Colaba, Mumbai – 400 005 and shall include the Purchaser‟s heirs, successors
and assignees.

The term `Sub-Contractor‟ shall mean the firm or persons named in the contract for
any part of the work or any person to whom any part of the work has been sublet with
the consent in writing of the Engineer-In-Charge and shall include his heirs,
successors and assignees approved by the Purchaser.

The Term `Inspector‟ shall mean any person appointed by/or on behalf of the
Purchaser to inspect supplies, stores or work under the contract or any person deputed
by the Inspector for the purpose.

The term `Particulars‟ shall mean, the following :

Specifications
Drawing
Sealed Pattern denoting a pattern sealed and signed by the Inspector.
Proprietary make denoting the produce of an individual firm.
Any other details governing the construction, manufacture and/or supply as existing
for the contract.

The term `Engineer‟ shall mean Engineer, Central Services, Tata Institute of
Fundamental Research, Colaba, Mumbai or some other person for the time being or
from time to time duly appointed in writing by the Owner to act as Engineer for the
purpose of the Contract or in default of such appointment the Purchaser.




                        - 39 -            - 39 -         - 39 -
The term `Specification‟ shall mean the specifications annexed to or issued with these
Conditions of Contract.

The term `Site‟ shall mean the place or places at which the Equipment is to be
delivered or work done by the Contractor shall include where applicable the lands and
buildings upon or in which the works are to be executed and shall also include the
place or places at which fabrication and other work is being carried out by the
Contractor.

`Electrical Equipment‟, `Stores‟, `Work‟ or `Works‟ shall mean and include
equipment and materials to be provided and work to be done by the Contractor under
the Contract.

The `Contract‟ shall mean acceptance of the work order placed on contractor/supplier
under section (2) of these conditions and shall include these conditions of Contract,
Specifications, Schedule, Drawing, Letter of Intent of the Purchaser and any
subsequent amendments mutually agreed upon.

`Tests on Completion‟ shall mean such tests are prescribed by the specifications or
have been mutually agreed to between the Contractor/Supplier and the Purchaser to be
made before the equipment is taken over by the Purchaser.

`Writing‟ shall include any manuscript, typewritten or printed statement under or over
signature or seal as the case may be. Words importing `person‟ shall include firms,
companies, corporations and association of individuals whether incorporate or not.

Words importing singular shall also include plural and vice versa where context
requires.

Contract:

Contractor/Supplier should send their acceptance letter on receipt of `Letter of Intent‟
or work order within stipulated period. On expiry of said period or exorbitant delay in
commencing or executing the work, the Purchaser shall not be liable to any claim
from the Contractor/ Supplier for work entrusted to and may revoke the contract.




                        - 40 -            - 40 -         - 40 -
Work at Site:

The contractor should ensure that his people follow safe practices at work.

Access to the works shall be allowed only to the Contractor/Supplier, Sub-Contractors
or his duly appointed representatives. The Contractor/ Supplier shall not object to the
execution of work by other contractors or tradesman and shall afford them every
facility for execution of their several works simultaneously with his own.

Work at the Purchaser‟s premises shall be carried out at such time as the Purchaser
may approve but the Purchaser shall give the Contractor/ Supplier all reasonable
facilities for the same. The Contractor/Supplier shall provide sufficient fencing,
notice boards etc. to guard the works and warn the public.

The Contractor shall obey Central, local and State regulations and enactment
pertaining to workmen and labour and the Engineer shall have the right to enquire into
and decide all complaints on such matters.

Delays:

The Contractor shall not be entitled to any compensation for any loss suffered by him
on account of delays in commencing or executing the work, whatever the cause for
such delays may be, including delays in procuring Government controlled or other
materials and delay in obtaining instructions and decisions from Engineer-In-Charge.
The Contractor shall, however, merit extension of time as hereinafter mentioned.

5.0     Taking Over:
        The equipment when erected at site shall be deemed to have been taken over
by the Purchaser when the Engineer will have certified in writing that the equipment
has fulfilled the contract conditions.




                        - 41 -           - 41 -          - 41 -
Extension of Time:

If the Contractor is delayed in the progress of work by changes ordered in the work,
or by any cause, which the Engineer shall decide to justify the delay, then the time of
completion shall be extended by a reasonable time. No such extension shall be
allowed unless requests for extension are made in writing by the Contractor/Supplier
to the Engineer within 15 days from the date of occurrence of the delay.

Other Damages:

The Contractor/Supplier shall be responsible for all injury to persons, animals or
things and for all damage to the works, structure of, and decorative work in the
property which may arise from operation or neglect of himself or any of his Sub-
Contractor or of his or Sub-Contractor‟s employees, whether such injury or damage
may arise from carelessness, accident or any other cause whatever in any way
connected with the carrying out of this contract. This clause shall be held to include
any damage to buildings, whether immediately adjacent or otherwise, any damage to
roads, streets, foot paths, as well as all damage caused to the works forming the
subject of this contract by frost or other inclemency of weather. The
Contractor/Supplier shall indemnify the Purchaser and hold him harmless in respect
of all and any expenses or property as aforesaid and also in respect of any claim made
in respect of injury or damage under any acts of Government or otherwise and also in
respect of any award of compensation or damages consequent upon such claim.

The Contractor/Supplier shall reinstate all damage of every sort mentioned in this
clause, so as to deliver up the whole of the contract works complete and perfect in
every respect and so as to make good or otherwise satisfy all claims for damage to the
property of third parties.

7.3     The Contractor/Supplier shall indemnify the Purchaser against all claims
which may be made against the Purchaser, by any member of the public or other
party, in respect of anything which may arise in respect of the works or in
consequence thereof and shall, at his own expense, effect and maintain, until the work
has been „taken over‟.




                        - 42 -            - 42 -         - 42 -
7.4     The Contractor/Supplier shall also indemnify the Purchaser against all claims
which may be made upon the Purchaser whether under the Workmen‟s Compensation
Act or any other statute in force during the currency of this contract or at common law
in respect of any employee of the Contractor/Supplier or of any of his sub-contractor
and shall at his own expense effect and maintain until the work has been `Taken
Over‟, with an approved office.

The Purchaser, with the concurrence of the Engineer, shall be at liberty and is hereby
empowered to deduct the amount of any damages compensation costs, charges and
expenses arising or accruing from or in respect of any such claims or damages from
any sums due to or become due to the Contractor/Supplier.




                        - 43 -           - 43 -          - 43 -
GENERAL INFORMATION TO BIDDERS

1.      On behalf of Tata Institute of Fundamental Research (hereinafter referred to as
the Institute) bids are invited for design, supply, installation, testing &
commissioning of Air- Conditioning system for INO Laboratory with associated
ducting, Insulation, refrigerant piping, cabling etc at TIFR on Homi Bhabha Road,
Navy Nagar, Colaba, Mumbai-400 005.

The Air-conditioning system shall be installed in stand alone Laboratory building.
The Laboratory building is situated near the Animal House. It is only a ground floor
structure.

It is important that the bidder must satisfy himself before quoting that the space
provided is adequate for installation of his plant along with all equipments and
accessories as no extra space can be provided. The tenderers must visit the site and
take the actual measurement before quoting. The bidders shall furnish a fully
dimensioned layout for his Package unit, with all equipment and accessories along
with quotation.

Bidder shall furnish the data called for in data sheets and the schedules in the standard
Proforma to facilitate correct evaluation of his bid in a most expeditious manner. It is
in the interest of the bidder to submit the bid in above manner with complete technical
details, failing which it is likely that his bid may not be considered.

Bidder shall be deemed to have carefully examined the specification in its complete
form and to have fully informed and satisfied himself as to the details, nature,
character and quantities of the work to be carried out, site conditions, and other
pertinent matters and details.

6.     It is the intent of the owner/purchaser to incorporate these specification
documents in the final contract order for the supply of material, equipment and
services. Bidders are required to review these documents and clearly state in their
proposals the acceptance of the same. Exceptions, if any shall be clearly stipulated in
appropriate bidding schedule. The final contract between purchaser and vendor shall
be subjected to such changes, if any, mutually agreed upon by purchaser and vendor
and included in the main text of the contract/order.

7.      Bidder shall clearly specify all the deviations with respect to this specification
in the appropriate schedule.


8.     SCHEDULE OF QUANTITIES TO BE FURNISHED BY VENDORS

8.1     All equipments mentioned in the enclosure should conform to the respective
technical specifications. Only main items of the tender have been brought out
specifically in this schedule, however all accessories as per specification or otherwise
should be furnished at the time of quotation with cost of individual item.

8.2     Tenderers are required to fill in unit rates for all the items mentioned in the
enclosure and any additional items quoted by them in the Financial Bid. In absence of
the unit rates, the offer may be considered as invalid.

8.3    All the equipments supplied shall be as per the „List of Approved Make‟
attached .

                         - 44 -            - 44 -          - 44 -
9.     ITEMS TO BE FURNISHED BY THE PURCHASER:

9.1    Following shall be furnished by the purchaser:

9.1.1 Building, foundations and trenches.

9.1.2 Water and power for testing and commissioning.

10.    SERVICES SUPPLIED BY PURCHASER DURING ERECTION:

       The purchaser will provide for the contractor following services during the
performance of work.

10.1 Temporary electric power at 415 V, 3 ph., 50 Hz at one point only which will
be within 50 M of location of works free of cost. Water shall be provided free of cost
for testing and commissioning.

10.2 The contractor shall make his own arrangement for supply, erection and
dismantling on completion of works of his temporary distribution system, distribution
panels and other equipments he may require to take the power from the purchaser's
supply points.

10.3 The contractor's temporary distribution system shall be subjected in every
respect to the approval of the purchaser and shall be arranged so as to avoid any
interference with other operations on the site.

10.4 The purchaser will not hold himself responsible for the consequences of any
interruptions to the continuity of the power supply or power system voltage and
frequency fluctuations.

10.5   The electric power shall not be used for heating purposes.

10.6 Electrical power made available to the contractor, during testing and
commissioning for the refrigeration unit is free of charge.

10.7 There is no EOT crane or mono rail to assist in erection work. Tenderer
should provide suitable derricks & tripods for lifting heavy load.

11.    SERVICE SUPPORT, SPARES & TOOLS:

11.1 The bidder shall provide in detail the Service Support Set-up in Mumbai of the
manufacturer or himself and lead time for replacement of faulty parts and for
providing technical service. The entire system will be on comprehensive AMC with
the supplier after the expiration of the guarantee period.

11.2 The tenderer shall furnish complete set of tools & wrenches for making
adjustments, repairs & preventive maintenance including those required for erection.

12     COMPLETION DRAWINGS (FINAL DRGS) & MANUALS:

12.1 The contractor shall submit tracings in original with five prints of all
installation drawings based on which equipments are installed & commissioned.

12.2   Contractor shall supply the following literature in four sets:

                        - 45 -            - 45 -          - 45 -
a.       Start-up, operation and maintenance instructions of Air-conditioning unit and
its parts.
b.       Installation instructions.
c.       Field wiring diagrams.
d.       Operation and Maintenance Manual of electrical parts used in the same.

.




                        - 46 -            - 46 -         - 46 -
INSTRUCTIONS TO BIDDERS & SPECIFIC
NON-TECHNICAL REQUIREMENTS


1.     The details in respect of Earnest Money, Security Deposit

       a)     Earnest Money Deposit:
       Bidder must deposit Rs. 60,000/- towards EMD along with the tender failing
which tender will be rejected. EMD will be accepted in the form of Bank Draft only
favouring Registrar, TIFR, Mumbai.

b)     Security Deposit:
5% (i.e. five percent) of the gross value of the work will be deducted from the
Contractor‟s bill towards Security Deposit.

c)     Refund of Security Deposit:
       The Security Deposit (5%) will be refunded to the contractor after the expiry
of defect liability period.

d)      Defect Liability Period:
12 (twelve) calendar months from the date of Institute‟s satisfactory completion
certificate will be taken as defect liability period.

e)     Bidders other than successful bidder will be refunded the EMD submitted by
them within 12 months from the date of opening of the tender and no interest shall be
paid against the said deposit.

f)    In case the successful bidder fails to undertake the said work, his EMD
amount will be forfeited.

g)    The EMD paid shall be part of Security Deposit, i.e. 5% of the Contract value
which will be refunded after expiry of Defects Liability period.

2.     No interest will be payable on the deductions towards Security Deposit/
Earnest Money.

3.     The Bidder shall submit the copy of their PAN card.




                        - 47 -            - 47 -         - 47 -
4.      Prices and rates quoted shall include cost of all materials, labour, plant,
equipment, temporary work, tools, setting out, supervision, transport, taxes, royalties,
octroi and any local tax or levy payable on all transactions, insurance and everything
necessary for due performance of work under this contract.

5.     Prices and unit rates shall be valid even if the contract is split.

6.      Contract should be fixed rate contract. No escalation in prices of the materials
during the currency of the contract is permitted. However any statutory variations
like change in excise duty, taxes etc. if levied after award of the work shall be paid on
production of proof of such changes. .

7.     a)     Site Visit:
       The bidders may like to visit the work site before submitting their bids to get
conversant with site conditions, which may affect the work.

b)     Location of Site:
       Tata Institute of Fundamental Research
       Navy Nagar, Colaba, Mumbai-400 005

8.     The work should be completed within 6 months from the date of issue of
Purchase Order.

9.     Work shall commence at site within 2 months from the date of issue of letter
of Purchase Order.

10.    The Contractor should plan and give his daily program for execution of work
in advance so that no disturbance is created in the routine working of the Institute.

11.     Turnover Tax/Works Contract Tax:
Turnover tax applicable to this contract shall be mentioned clearly and included by
the bidder in his bid. No claim shall be entertained by the owner thereafter.
12.     Date of Taking Over:
Site shall be deemed to have been taken over by owner when Engineer In-Charge
certifies the completion of work in all respect as per tender conditions and
specification.




                         - 48 -            - 48 -           - 48 -
13.     Income Tax as per the prevailing rates will be deducted from the progressive
bills.
14.     The contractor shall not without the consent in writing of the Owner assign or
sublet the contract.
15.     No labour below the age of 18 years shall be employed at site.
16.     Contractor shall be liable to pay workman compensation to his labour as per
prevailing rules for any accident occurring at our site.
17.     The contractor shall pay wages to his workmen as per the Statutory Minimum
Wages Act.
18.     The Contractor shall provide all risk insurance for his men, material and
machines and absolve us of all risk and liabilities whatsoever pertaining to his men,
material and machines.
19.     The Contractor will arrange for photo passes of his personnel and get the same
endorsed by our Establishment/Security Department before beginning the work.
20.     The Contractor will ensure that his workmen follow safe practices at Work.
21.     The Contractor will work from 8.00 a.m. to 6.00 p.m.
22.     No labour camp etc. will be allowed to be put up inside or in the vicinity of the
Institute.
23      Any dispute arising from this contract will be referred to two arbitrators one to
be appointed by you and one by us. The two arbitrators, in the event of their
disagreement will appoint an Umpire. The decision of the Umpire shall be final and
binding. The arbitration will proceed as per Indian Arbitration Act, 1940, as amended
up to date.
24.     The contractor should ensure that his engineer/supervisor is present at site
throughout the progress of works till completion.
25.     Terms of Payment:
        Payment of pipe lines shall be made as per unit length i.e. per running
mtr./feet.
Unless otherwise agreed to in writing between the Purchaser and the
Contractor/Supplier, payment for the delivery of the equipment approved by the
Inspector will be made as follows:
70% of the Contract value against delivery, prorata of the value
                of goods delivered and after checking the same at site.
15% on completion of erection.
10% on commissioning and final inspection and testing at site.
5% against PBG valid for 12 months from the date of handing over or after expiry of
the Defect Liability period as stated in Clause 1d) page 11.



26.     The bidder should submit technical data sheet, drawings, any other technical
detailed asked for in the tender with Part II i.e. Technical Bid of the Tender.
27.     The schedule of quantities and rates shall be read in conjunction with the
specification, tender drawings, other tender documents, relevant IS Codes,
Engineering hand books, etc. the Contractor shall not rely merely on the description
given in the Schedule of Quantities.

28.   The quantities mentioned in “Bill of Quantities” are estimated quantities.
However the payment shall be made as per actual quantities measured at site, after
completion of work.

29.     Contractor will be fully responsible for lifting, shifting and handling Institute‟s
properties such as any articles and materials lying nearby to proper place as instructed
by Site In-Charge.
                         - 49 -            - 49 -          - 49 -
30.     All the materials used shall be used only after approval and tests of the
Engineer-In-Charge as per specifications.
31.     All the debris shall be removed by the Contractor at his cost to any nearest
BMC approved dumping yard.
32.     Storage and custody of material, till the time of handing over to TIFR, shall be
the responsibility of contractor.
33.     The contractor after award of work, should submit detailed schedules showing
program and order in which contractor proposes to carryout the work with dates and
estimated completion time for various parts of work. This should be submitted in the
form of Bar-chart.
34.     The Engineer can instruct the contractor to make any alteration, omission, or
variation in work. The difference in cost due to instruction shall be added or deducted
from contract price as the case may be in accordance with the rate applicable in the
contract.
35.     DEVIATION FROM THE SPECIFICATIONS:
The Contractor must tender for the equipment as herein specified but may submit
alternate proposals for modifications to details where such modifications offer
technical advantages and will make cost savings to the owner. The basis and details
of calculations of operating cost and the net expected final saving shall be indicated
wherever such a claim is made. The acceptances or otherwise of alternate
proposal/deviations/ modifications etc. will be decided solely by the owner.

36.     Inspection of Material & Equipment:
        Supplier shall arrange for inspection/testing of AHUs at his works. TIFR will
have liberty to inspect/test the parts of AHUs during the manufacturing/assembly. No
charges will be paid extra towards inspection/testing. The bidder shall make necessary
arrangements for travel, boarding & lodging for 3 engineers of TIFR deputed for
inspection & testing of the AHUs at manufacturer‟s premises.




                         - 50 -           - 50 -         - 50 -
BASIS OF DESIGN & SCOPE OF WORK

 1.1   Design Parameters for selection of air handling unit & its components shall be:

       Maximum face velocity across prefilter        -      400 – 450 Ft./Min.
       Maximum face velocity across coils -          450 – 500 Ft./Min.
       Maximum fan outlet velocity         -         1600 Ft./Min.
       Maximum fan speed                   -         800 RPM
       Maximum fan motor speed             -         1500 RPM

Piping shall be sized for the following design parameter

Maximum flow velocity                        -       8 Ft./Sec.
                                                     = 2.5 Mtrs./Sec.
Maximum friction                             -       5 Ft. per 100 Ft. run

1.3    Design parameters for duct design shall be

       Max. flow velocity [S.A. Duct]                -        1200 Ft./min.
                                                              = 365 Mtr./min.

       Max. flow velocity [R.A. Duct]                -        800 Ft./min.
                                                              = 240 Mtrs./min.

       Max. friction drop                            -        0.1” WG/100 Ft. run
                                                              = 1 cm WG/100 M run

       Max. velocity at supply air diffusers -       500 Ft./Min.
                                                             = 150-200 Mt./Min.

2.0     The proposed new AHUs will be put after replacing the old AHUs, which are
in running position. The contractor shall have to carry out the work in short span of
time (during shut down), preferably during weekends including Sunday. The
contractors need to work day and night to ensure minimum disturbance to users.
3.0     The contractor should inspect the site before quoting and ascertain for himself
the nature, character and extent of work to be executed and should include all items
and services necessary, whether specially mentioned or not in the specifications,
scope etc. to meet with the intent and purpose of these specification.



4.0     After award of work contractor should submit the GA drawing as well as data
sheet of AHU, parts etc. for engineer‟s approval. He shall start the manufacturing only
after the approval.
All AHUs with the motor above 5 HP should use the flat type belt for transmission of
power (“Habasit-Iakoka” make flat belt only). Below 5 HP motor, a regular V-type
belt of Fenner make should be provided.
The static pressure & air flow rate mentioned in the tender are maximum for the
purpose of designing the components. However it is contractor‟s responsibility to
prove the airflow rate at the time of commissioning. He can use V belt pulley at initial
stage and later on replace with flat belt once system stabilizes.
During the replacement of AHU contractor shall cut/modify the existing header/coil
connection as per the new requirement. The new piping shall be paid on RMT basis as
per the tender rate. Similarly ducting connection includes cutting/modifying the
                        - 51 -            - 51 -           - 51 -
existing ducting including making new plenum, if necessary. The new ducting shall
be paid on Sqft basis as per tender rate.
The manufacturer of AHU should have the single space for assembly & testing of
AHU preferably at his work, where different section of AHU like casing, coil etc.
manufactured.
Supplier shall arrange for inspection/testing of AHU at his works. TIFR will have
liberty to inspect/test the parts of AHU during the manufacturing/assembly of AHU.
No charges will be paid extra towards inspection/testing. The bidder shall make
necessary arrangements for travel, boarding & lodging for 3 engineers of TIFR
deputed for inspection & testing of the AHUs at manufacturer‟s premises.
Ceiling suspended type AHU should have intermediate anti vibration device to stop
transmission of vibration to ceiling.
There are various sizes of insulated piping in the institute on which the layers of sand
cement plaster required. Bidder should quote his rate of sand cement plaster of
various sizes as per item no. 16 of BOQ.
Spare Motor with pulley shall be provided on extended shaft for Two AHUs (23500
CFM & 9000 CFM Catering to Pelletron Building)
Power supply shall be given by TIFR at AHU motor as per requirement but the
termination at motor end (With Copper Lugs) shall be in the scope of contractor.
Out of eight AHUs, 4 AHUs of Pelletron block, one AHU for `C‟ Block Mezzanine &
one AHU (ceiling suspended) of Pent House are to be replaced on one to one basis,
whereas the remaining two AHUs capacity have been changed. It is the responsibility
of successful bidder to prove the capacity of each AHU. Mere quoting on the basis of
tender will not absolve the successful bidder from proving the capacity of AHUs.

15.0 All welding must conform to the requirements of applicable IS standards. All
welding procedures and details shall be subject to the approval of Engineer In-Charge.
All necessary arrangements for working at heights above the floor level like
scaffolding, rope etc. shall be arranged by the Contractor. All materials, equipments,
tools & tackle, shifting and lifting arrangement and other necessary items required to
carry out the work shall be arranged by the Contractor. All other necessary
equipments, arrangements like welding machine, gas cutter, welding rods, drill bits,
drilling machine, grinder, gas cylinders for gas cutting etc. shall be arranged by the
Contractor. Electricity & water needed for carrying out the work shall be provided
free of cost by TIFR.

16.0 The Contractor shall make arrangements to store his tools, equipments etc. in
his own tool box having proper locking arrangements. Material required for carrying
out the work such as flanges, nuts and bolts, rubber gasket, pipes etc. shall be
provided by the Contractor. All the above material shall be of high standards and
subjected to the approval of the Engineer In-Charge.

17.0 The work shall be carried out with least disturbance to the users. The shut
down if any required for carrying out the works shall be minimum and advance
intimation to be given. Shut down periods will be intimated for the work to be taken
up after obtaining the necessary approval form the Users.

18.0 The Contractor shall inspect the site and ascertain for himself the nature and
extent of work to be executed and shall include all the items and services necessary
whether specifically mentioned or not in the tender specification, drawing, so as to
meet the intent and purpose of this specification.




                        - 52 -            - 52 -         - 52 -
TECHNICAL SPECIFICATIONS

1.     SCOPE :
The scope of this section comprises the supply, installation, testing and
commissioning of single skin air handling units of the size and capacity set forth in
the Schedule of Equipment.

CABINET TYPE:
2.1     The unit shall be of sectionalized construction consisting of Fan section, coil
section, Filter section and drain pan.

2.2     Metallic casing shall be fabricated from 16 Gauge galvanized sheet steel
ribbed and reinforced for structural strength and rigidity. 16 Gauge hot section
channels shall be used for reinforcing .It shall be sectionalized construction with
proper sealing at the joints to make the joints air tight. Fan section and panels with
bearing supports shall be reinforced with heavy gauge channels. For AHUs supported
on floor, leg packages shall be provided for attachment to the Fan and Filter sections,
raising the height by 350mm. All edges shall be formed inter locking to stiffen and
support the weight and shall be secured with galvanized nuts and bolts.

2.3     Fan impeller shall be of forward curved blade centrifugal type. Impeller shall
be of double width double inlet type. Two or three wheels shall be provided for each
AHU. Blower section (includes Scroll, impeller blades, etc.) shall be fabricated from
16 gauge galvanized sheet steel. Fan housing shall be made of die formed side sheets
with stream lined inlet and guide vanes to ensure smooth air flow into the fans. Fan
shaft shall be of solid cold rolled carbon steel, ground and polished. The whole
assembly shall be statically and dynamically balanced for smooth operation.
Fan shaft bearing shall be of heavy-duty type selected for an average operating life of
100,000 hours. Bearing shall be self-aligning type. They
shall be permanently lubricated. Bearing housing shall be fabricated from malleable
iron and suitably supported from outside.

 Fan motor shall be mounted on an adjustable sound isolating base located on the top
surface above the AHU.

2.4     Cooling Coils shall be of the fin and tube having Aluminum fins firmly
bonded to Copper tube (Seamless solid drain). Capacity of the coil shall be as
required under the Schedule of Equipment. Velocity of air across coil face shall not
exceed 500 CFM. Tube shall be of 5/8” O.D. and with 10-12 fins per inch. Coils
shall be tested at 300 psig Nitrogen pressure in presence of our engineers. Shut off
valve (Butterfly type) at the inlet and outlet of coil to be provided. Proper purging
and drain arrangement to be made on header of coil. Copper tube gauge




                         - 53 -           - 53 -          - 53 -
        thickness shall not be less than 20 SWG. Aluminum fins gauge shall not be
less than 32 G. Fin punching profile must follow full length air of contact with tube
and must be turned at edges to increase rigidity and contact.

Drain pan shall be constructed of 18 G stainless steel with sandwich type insulation
in-between bottom plates. Necessary support shall be provided to slide the coil in the
drain pan. Outlet shall be provided on both the side of drain pan. An extension drip
pan shall be provided at proper location outside the casing to catch all drip from
external coil connections and valves.
End panel of the coil section casing shall be removable for withdraw of the coil and
shall be provided with opening for coil connections.

2.5     Filters shall be cleanable viscous metal AL box type and shall be 50 mm thick.
The filter shall be hold with stiffeners in-between made out of hollow SS material.

2.6     Suitable, easily openable service door (for Internal Maintenance) between coil
section and fan section to be provided to enable a person to enter inside

2.7    Unit shall be thermally and sound insulated as in section “Insulation”

2.8     Spring type Anti Vibration Mounting of approved make shall be provided as
vibration isolators.

2.9     Sheet metal fresh air louvers with frame, damper, etc. shall be provided in the
clear opening in masonry made by the owner.

2.10 The Unit cost shall be complete with all accessories, including the following:
1] Manual air vents at high point and drain at low point. 2] Water
Thermometers at Inlet & Outlet.3] Pressure gauges with siphon cocks
at Inlet & Outlet. 4) Canvass Connection

3.      PERFORMANCE DATA & TESTING:
Air handling units shall be selected for the lowest operating noise level of the
equipment for performance rating and power consumption data with operating
points(On Fan Curve) clearly indicated shall be submitted with the tenders and
verified at the time of testing and commissioning . The following test result shall be
furnished during commissioning in the presence of department‟s Engineer;

a) Air Side
Air Flow Rate in CFM or Cub.M per hour
Static pressure in mm wg
Entering Dry bulb & Wet bulb temperature
Leaving Dry bulb & Wet bulb temperature


b) Water Side
Inlet temperature in degree C
Outlet temperature in degree C
Pressure drop in psig

PAINTING:
Unit shall be painted with approved type of Epoxy paint (minimum two coats)

CODES & STANDARDS FOR AIR HANDLING UNIT:

                         - 54 -           - 54 -          - 54 -
        The design, manufacture and performance of AHU shall comply all currently
applicable statutes, regulations and safety codes in the locality where the equipment
will be installed. The equipment shall also conform to the requirements of the latest
editions of applicable Indian/U.S.A. standards. Nothing in this specification shall be
construed to relieve the vendor of this responsibility. In particular the equipment shall
conform to the latest editions of the following standards:

a)     ANSI 89.1       Safety code for mechanical refrigeration.
b)     IS:659          Safety code for air-conditioning.
c)     IS:660          Safety code for mechanical refrigeration.
d)     AHRAE           Standard-33 methods of testing for rating forced
                       Circulation air-cooling and air heating coils.
e)     ARI-410         Standard for forced circulation air cooling and air
                       Heating coils.

       G.I. insulated condensate drain piping with drain valve, upto sump or floor
drain within the air handling unit room. The drain shall be provided with proper „U‟
loop. Only piping and valve shall be measured and paid at unit rate.

PERFORMANCE DATA:
        Air handling units shall be selected for the lowest operating noise level of the
equipment. Fan performance rating and power consumption data with operating
points clearly indicated shall be submitted with the tenders and verified at the time of
testing and commissioning of AHU.




                         - 55 -           - 55 -          - 55 -
         SHEET METAL WORK

1.0      SCOPE:

1.1    The scope of this section comprises the supply and installation of all sheet
metal ducts.

1.2      MATERIAL:

1.2.1 Ducts shall be made of galvanized steel sheets. The galvanized
      steel sheets shall conform to IS 277-1965 with 200gsm Zink
      coating.

1.2.2 The thickness of sheets shall be as given below:

Dimensions Gauge                   Gauge            Type of Joints            Type of
Bracings
of ducts      G.I.                     Al

Upto 600           24             22        G.I. Flange at     Cross bracings.
                                            2.5 centre

601 to 750         24             22        25 x 25 x 3 mm 25 x 25 x 3 mm MS
                                            Angle iron frame angles bracing at
1500
                                            With 6 mm dia. mm from joints
                                            Nuts & bolts

751 to 1000             22             20           25 x 25 x 3 mm          25 x 25 x
3 mm MS
                                            Angle iron frame angles      bracing      at
1500
                                            With 6 mm dia. mm from joints
                                            Nuts & bolts

1001 to 1500 22                   20        40 x 40 x 5 mm 40 x 40 x 3 mm MS
                                            Angle iron frame angles bracing at
1500
                                            With 8 mm dia. mm from joints
                                            Nuts & bolts

1501 to 2250 20                   16        50 x 50 x 3 mm 40 x 40 x 3 mm MS
                                            Angle iron to be angle bracing at
                                            Cross braced     1200    mm     from
joints
                                            diagonally with or 40 x 40 x 3 mm
MS
                                            10 mm dia. nuts         angle      diagonal
bracing
                                            and bolts at 125
                                            centre.

2250 & above 18                   14        50 x 50 x 6 mm 50 x 50 x 3 mm MS
                         - 56 -             - 56 -      - 56 -
                                     Angle iron 10      angle bracing at
                                     mm dia. nuts       1200    mm     from
joints
                                     and bolts at 125 or 50 x 50 x 3 mm
MS
                                     centre.            angle       diagonal
bracing




HANGERS FOR DUCT:

Duct Size       Spacing           Size of MS equal angle    Size of rod dia
 [mm]                [M]                     [mm x mm]
[mm]

Upto 750         2.5                    40 x 3                           10

751 to 1500      2.0                    40 x 3                           12

1501 to 2250              2.0                  50 x 3
      15

2251 to above      2.0                         50 x 3
      15

         All the MS angle, use for duct support & brazing etc, shall be
         hot dip galvanized

1.3      DAMPERS:

1.3.1 All dampers shall be louver dampers of robust construction &
      tightly fitted. The design, method of handling and control, shall
      be suitable for the location and service required.

1.3.2 Dampers shall be provided with suitable links, louvers and
      quadrants as required for their proper operation, control or
      setting in any desired position. Dampers & their operating
      devices shall be made robust, easily operable and accessible
      through suitable access doors in the ducts. Every damper shall
      have an indicating device clearly showing the damper position at
      all times.

1.3.3 Dampers shall be placed in ducts & on main supply or return
      air duct  for the proper volume control and balancing the
      system.

1.4      GRILLS & DIFFUSERS:

1.4.1 All side wall supply air grills shall be similar and equal to Tuttle
      and Bailey Triflox T 647 double deflection register with approved
      damper. Supply air grills shall be provided with vertical and

                         - 57 -      - 57 -       - 57 -
      horizontal adjustable bars and volume control multi-louver
      damper that shall be key operated from the front of the grills.

1.4.2 All return air grilles shall be similar & equal to Tuttle & Bailey
      Aerovane 770D grills.




1.5   INSTALLATIONS:

1.5.1 The duct fabrication & installation shall generally conform to
      I.S. 655-1963.

1.5.2 The contractor shall provide and neatly erect all sheet metal
      work or as may be required to carry out the intent of these
      specifications and this shall meet with the approval of the
      Engineer in all its parts and details.

1.5.3 All necessary allowances and provisions shall be made by the
      contractor for beams, pipes or other obstructions in the
      building. Where necessary to avoid beams or other structural
      work or plumbing or other pipes or conduits the ducts shall be
      transformed, divided or curved to one side, as approved or
      directed by the Engineer.

1.5.4 All metal work in dead or furred down spaces shall be erected in
      time to cause no delay to other contractors in the building.

1.5.5 Ducting over furred ceiling shall be supported from the slab
      above, or from beams. In no case shall a duct be supported
      from the ceiling hangers or be permitted to rest on a hung
      ceiling.

1.5.6 If a duct cannot be run as decided, the Contractor shall install
      the duct between the required point by any path available,
      subject to the approval of the Engineer.

1.5.7 All ducts shall be rigid and shall be adequately supported and
      braced where required with standing beams, tees or angles of
      ample size to keep the ducts true to shape and to prevent
      buckling, vibration or breathing.

1.5.8 All joints shall be made tight and all interior surfaces shall be
      smooth. Bends shall be made with radius not less than ½ the
      width of the duct or with scientifically designed interior curved
      vanes, as approved. The vanes shall be so spaced that the
      aspect ratio of each of the individual elbow formed by the vanes
      will be about five.
                     - 58 -        - 58 -       - 58 -
1.5.9 All sheet metal connections, partitions & plenums required to
      confine the flow of air to and through the filters and fans, shall
      be constructed of 18 G galvanized Iron, thoroughly stiffened
      with 1” x 1” angle Iron braces and fitted with all necessary doors
      as required by the Engineer, to give access to all parts of the
      apparatus. Doors shall be not less than 18” x 20” in size.

1.5.10       Where metal ducts or sleeves terminate in wood work,
      brick or masonry openings, tight joints shall be made by means
      of closely fitted heavy flanged collars.




1.5.11       Air handling units shall be connected to duct work by
      inserting at air inlet and air outlet a double canvas sleeve. Each
      sleeve shall be minimum 4” long securely bonded and bolted to
      duct and units. Each sleeve shall be made smooth and the
      connecting duct work rigidly held in line with unit inlet or
      outlet.

1.6   INSULATION:

1.0   SCOPE:

1.1   The scope of this section comprises the supply and application
      of insulation as herein specified.

2.0   COLD INSULATION:

2.1   All pipes, ducts & equipments operating at temperature lower
      than the ambient shall be insulated in the manner specified
      hereinafter.

2.2   The insulating material shall be as follows:

      a)    Pipes:
            Rigid preformed sections of expanded polystyrene of
            uniform density of 24 Kgs./m3 with a `K’ value of not
            more than 0.23 B.T.U/ Hr./In/Sq.ft./0F at 500F mean
            temperature.

2.3   No insulation shall be applied on pipes until the pipes are
      satisfactorily tested.

      Thickness of pipe insulation shall be 50mm.

2.4 Pipe insulation shall be applied as follows:
   a) Pipes shall be thoroughly cleaned with wire brush and rendered
      free from all rust and grease.

                    - 59 -        - 59 -       - 59 -
      b) Two coats of bitumen shall be applied on the cleaned pipe
         surface.

      c) Rigid pipe sections of insulation shall be fixed tightly to the
         surface taking care to seal all joints and covered with Polythene
         sheet.

      d) 24 G x 20 mm mesh wire netting shall be applied, butting all
         joints and shall be laced down with G.I. wire.

  e)     Insulated surface shall be finished with two layers of sand
         cement plaster. Each layer shall be not less than 7 mm thick.

2.5      All valves, fittings, strainers etc. in chilled water piping shall be
         insulated to the same thickness as specified for the main run of
         piping. Valve bonnets, yokes and spindles shall be insulated in
         such a manner as not to cause damage to insulation when the
         valve is used or serviced.

2.6      Cabinet air handling units shall be insulated as follows.
         Fans & coil section panels shall be internally lined with fire
         retardant quality 25 mm thick, 24 Kgs./m3          density
         thermocole slab (with black pigmented neoprene coating).

         The insulation should be stuck to the body of AHU without
         making any hole in the body.

2.7      Ducts shall be insulated as follows:
         -------------------------------------------------------------------------------
         ---------------
            Type                        Location                       Insulation
         -------------------------------------------------------------------------------
         ---------------
      a) Supply duct            unconditioned space           50 mm, 24 kg/m3
         density
                                                              TF               quality,
         thermocole
                                                              slab.
      b) Supply duct            conditioned space             25 mm, 24 kg/m3
         density
                                                              TF               quality,
         thermocole
                                                              Slab.
      c) Return duct or         unconditioned space           25 mm, 24 kg/m3
         density
         plenum                                               TF               quality,
         thermocole
                                                              slab.
         ====================================================
         Contractor shall submit the Insulation material test certificate clearly
         showing density, K value, lot ,etc of material.

2.7      Duct insulation shall be applied as follows:

                         - 60 -           - 60 -         - 60 -
      a)    Black bitumen paint shall be applied over the surface after
            cleaning the ducts.
      b)    24 kg/m3 density thermocole slab insulation of specified
            thickness shall be put by using Bitumen uniformly over
            Insulation surface.
      c)    The Thermocol Insulation shall be covered with 40 G AL foil. Al
            foil should be wrapped on Thermocole uniformly, using
            Bitumen.
      d)    The Joints of AL foil shall be overlapped at least 75mm covered
            with AL tape. Stripping should be done at distance of 1 meter to
            hold the insulation, wherever required.
      e)    Wherever necessary and particularly in larger duct, strapping
            with PVC material should be done after thermocol insulation
            and before putting AL foil

2.9   Acoustic Insulation of Duct:-
      The acoustic Insulation shall be done with 48 Kg/cu.m.Density,25mm
      thick Resin bonded Fibre Glass.


      The duct surface shall be cleaned and hot bitumen applied in patches
      and resin bonded glass wool cut to appropriate sizes and stuck to the
      duct wall. The insulated face shall be covered with RP tissue papers &
      perforated AL sheet of 28 Gage thickness having 3mm perforations at
      5mm staggered centre and held in position with rivets or galvanized
      steel bolt with counter sunk heads & 50 x 50 x 2 mm plate washers at
      not more than 600mm centers.

1.7   PIPING

1.0   SCOPE:
      The scope of this section comprises the supply & laying of all pipes
      required for this project. On the award of the contract, the tenderer
      shall prepare his own detailed working drawings.

2.0   CHILLED WATER PIPING:

2.1   All chilled water piping and fittings shall be of M.S. Class `C‟ (heavy
      class) of TATA/Jindal make only. The pipe confirming to BIS 1239 for
      pipe size upto 150 mm dia. and for pipe size 200 mm dia. and above
      shall be as per BIS 3589 having minimum 6 mm thickness. All joining
      in piping shall generally be by welding unless otherwise mentioned or
      as directed at site. All welding shall be done by qualified welders and
      shall strictly confirm to Indian Standard code of procedure for manual
      metallic welding of mild steel as per BIS 823.
2.2   The piping shall be so designed that the water velocity through the
      piping shall not exceeds maximum 8 fps and also the piping friction
      drop shall be limited to 4 m per hundred meter of pipe length.
      Pipe threads shall be of I.S. 554/1955 and flanges of I.S. 1536/1960..
      Pipes shall be sloping towards drain points.


                     - 61 -         - 61 -        - 61 -
2.3   Fittings shall be new and from standard manufacturers. Fittings shall
      be malleable casting of pressure ratings suitable for the piping system.
      Fittings used on welded piping shall be of the weldable type. Flanges
      shall be new and from standard manufacturers. Supply of flanges shall
      include bolts, washers etc. as required.

2.4   Tee-off connections shall be through reducing tees, wherever possible.
      Otherwise ferrules welded to the main pipe shall be used.

2.5   All equipment and valve connections or connections to any other
      mating pipes, shall be through unions/screwed flanges upto 50 mm
      dia. And flanges (welded or screwed for G.S.) for larger diameters or as
      required for the mating connection.

2.6   All welded piping is subject to the approval of the Engineer and
      sufficient number of flanges and unions shall be provided as required
      under.

2.7   All the drain piping shall be of G.I. „C‟ class of TATA/Jindal make with
      the Insulation as specified in the „Insulation‟

2.8   Gate valves shall be provided conforming to the following
      specifications.

      ----------------------------------------------------------------------------------------------
      Size                       Construction                                 Ends
      ----------------------------------------------------------------------------------------------
      12 to 65 mm                Gun metal                                    Screwed female

      65 mm & over          a) Body - Cast Iron                               Flanged
                            b) Spindle, valves seat,
                                              Bronze or
                               Wedge, nut etc. –
                                              Gun Metal
      ===================================================

      Valves shall conform to I.S. 780/1963 & flanges to I.S. 1536/1960 or as
      required. Valves shall have non rising spindles unless otherwise
      specified and shall be suitable for 300 psig test pressure. The valve
      shall be of Leader make. Tail pieces shall be used wherever required.

2.9   Butterfly valves shall perform the function of isolating valves.
      Butterfly valves shall have cast iron body with Nitrile rubber bonded
      bakelite hard back seat. Disc shall be of high duty iron with epoxy
      coating on nickel plating. All butterfly valves shall be provided with
      locking devices. The shaft shall be stainless steel AISI 410. The valve
      shall be Audco make only.

3.0   PIPING INSTALLATION:

3.1   Pipe runs and sizes should to meet the site conditions. The contractor
      on the award of the work shall prepare detailed working drawings,
                          - 62 -              - 62 -             - 62 -
      showing the cross section, longitudinal sections, details of fittings,
      locations of isolating, drain and air valves etc. They must keep in view
      the specific openings in buildings and other structures through which
      the pipes are designed to pass.

3.2   Piping shall be properly supported on or suspended from strands,
      clamps, hangers etc. as specified and as required. The tenderer shall
      adequately design all the brackets, saddles, clamps, hangers etc. and be
      responsible for their structural integrity.

3.3   Pipe supports shall be of steel, adjustable for height and prime coated
      with rust preventive paint and finish coated black. Where pipe and
      clamp are of dissimilar material, a gasket shall be provided in between.

      Spacing of pipe supports shall not exceed the following:
      Pipe (mm)                               Sapcing (Meters)
      3 to 12                                 1.22
      19 to 25                                1.83
      32 to 150                               2.44
      150 and above                           3.05

      Pipe hangers shall be fixed on walls and ceilings by means of metallic
      rawl plugs or approved shear fasteners.

3.4   Vertical risers shall be parallel to wall and column lines and shall be
      straight and plump. Risers passing from floor to floor shall be
      supported at each floor by clamps or collars attached to pipe and with
      a 12 mm thick rubber pad or any resilient material. Where pipes pass
      through the terrace floor, suitable flashing shall be provided to prevent
      water leakage. Risers shall also have a suitable elbow or concrete pipe
      support at the lowest point.

3.5   Pipe sleeves of 50 mm diameter shall be provided wherever pipes pass
      through walls and the annular space filled with felt and finished with
      retaining rings.

3.6   Insulated piping shall be supported in such a manner as not to put
      undue pressure on the insulation.

3.7   Cut-outs required in the floor slabs for taking the various pipes are
      provided. Tenderers shall carefully examine the cutouts provided and
      clearly point out wherever the cutouts do not meet with the
      requirements.

3.8   Piping work shall be carried out with minimum disturbance to the
      other work on the site. A program of work shall be chalked out in
      consultation with the Engineer.

3.9   All pipes using screwed fittings shall be accurately cut to the required
      sizes and threaded in accordance with I.S. 554/1955 and burrs
      removed before laying. Open ends of the piping shall be blocked as
                     - 63 -          - 63 -        - 63 -
       the pipe is installed to avoid entrance of foreign matter. Wherever
       reducers are to be made in horizontal runs, eccentric reducers shall be
       used if the piping is to drain freely; in other locations, concentric
       reducers may be used.

3.10   Drains shall be provided at all low points in the piping system and
       shall be of the following sizes:

             Mains                                           Drain

       Upto 300 mm                                           25 mm
       Over 300 mm                                           40 mm

       Drains shall be provided with gate valves of equal size with rising
       spindle. Drains shall be piped through equal size G.I. pipe to the
       nearest drain or floor waste. Piping shall be pitched towards drain
       points.



4.0    PRESSURE GAUGES:

4.1    The pressure gauges shall be Bourbon tube type confirming to IS : 3624
       and shall be with siphon cock and angle valve. Pressure gauges shall
       be not less than 150 mm dia. and of appropriate range etc. duly
       calibrated before installation. The Pressure gauges shall be of
       H.GURU/equ. make.
4.2    Care shall be taken to protect pressure gauges during pressure testing.

5.0    THERMOMETERS:

5.1    Thermometers shall be either 150 mm dia. dial or direct reading
       industrial type, of appropriate range, duly calibrated before
       installation. Thermometers shall be installed in separable wells.

6.0    INSULATION:

6.1    Pipes shall be insulated in accordance with specifications in section
       `INSULATION‟.

7.0    VIBRATION ELIMINATION:

7.1    Piping installation shall be carried out with vibration elimination
       fittings wherever required.

8.0    TESTING:

8.1    All piping shall be tested to hydrostatic test pressure of at least 1½
       times the maximum operating pressure, but not less that 7 Kgs/Sq.Cm.
       for a period of not less than 24 hours. All leaks and defects in joints

                      - 64 -         - 64 -        - 64 -
      revealed during the testing shall be rectified to the satisfaction of the
      Engineer.
8.2   Piping repaired subsequent to the above pressure test shall be retested
      in the same manner.
8.3   System may be tested in sections and such sections shall be securely
      capped.
8.4   The owner shall be notified well in advance by the Contractor of his
      intention to test a section or sections of piping and all testing shall be
      witnessed by the Engineer or his authorized representative.
8.5   The contractor shall provide all materials, tools, equipment,
      instruments, services and labour required to perform the test and to
      remove water resulting from cleaning and/after testing.
8.6   The contractor shall make sure that proper noiseless circulation of fluid
      is achieved through all coils and other heat exchanger in the system
      concerned. If proper circulation is not achieved due to air bound
      connections, the Contractor shall rectify the defective connections. He
      shall bear all the expenses for carrying out the above rectifications,
      including the tearing up and re-finishing of floors, walls, etc. as
      required.


8.6   No insulation shall be applied to piping until after the completion of
      the pressure testing to the satisfaction of the Engineer.

9.0   PAINTING:

9.1   After all the piping has been installed, tested and run for at least 10
      days of eight hours each, the piping shall be given two finish coats, as
      follows:
      ----------------------------------------------------------------------------------------------
      Service                             Flow                                Colour
      ----------------------------------------------------------------------------------------------
      Chilled water                       supply return              as approved by the
                                                                     Engineer
      ====================================================

9.2   The direction of flow of fluid in the pipe shall be visibly marked in
      White arrows.

1.8   ELECTRICAL EQUIPMENT

1.0   SCOPE:

1.1   The scope of this section comprises the supply & installation of all
      electrical equipment, such as, electrical motors

2.0   RATINGS & STANDARDS:

2.1   Rating of the motors shall be as indicated by you in the data sheets and
      as per the requirements of the airflow and static pressure. Ratings shall

                          - 65 -              - 65 -            - 65 -
      be on the basis of the specified ambient temperature and without
      exceeding the maximum temperature limits set by IS 325/1961.

2.2   Unless otherwise stated, Indian Standard Specifications shall apply.
      Where I.S. specifications are not available, the relevant British Standard
      Specifications shall be followed.

3.0   SQUIRREL CAGE INDUCTION MOTORS:

3.1   All motors shall be screen protected drip proof type TEFC with Class-C
      insulation, conforming to I.S. 325/1961 unless otherwise specified.

3.2   The motor shall be statically and dynamically balanced.

3.3   Bearings shall be combination ball and roller type with limit
      lubricators.

3.4   Termination shall be of ample size housed in a termination box . The
      terminal box shall be suitable for cable entry. Two earth terminals shall
      be provided.

3.5   The starting torque shall match with the load torque and the starting
      current shall not exceed 6 times the full load current.

4.0   INSTALLATION:

4.1   All motors shall be mounted on a common foundation with the driven
      equipment coupled through flexible couplings or through belt drive.
      Installation shall be in accordance with I.S. 900/1956.

4.2   Flexible connections shall be provided to all motors terminals
      wherever the motor is mounted on guide rails and belt drive is
      adopted. Even in the case of direct drive motors, the connections shall
      be flexible enough to prevent transmission of vibration.

4.3   All drive arrangements and couplings shall be provided with a safety
      guard.

5.0   TESTING:

5.1   Motors shall be tested in accordance with the relevant Indian Standard
      Specifications and test certificates furnished for routine type and high
      voltage tests.

6.0   PAINTING:

6.1   All motors, starters and the frame work shall be painted with two coats
      of a suitable paint of approved colour.




                     - 66 -          - 66 -         - 66 -
- 67 -   - 67 -   - 67 -
     Schedule of Technical Data for each Air Handling Unit
                (To be submitted for each AHU separately)


        Technical data shall be furnished as below:


I)      General:
        1)   Make:-
        2)    Air Discharge Direction:- Horizontal or Vertical
        3)    Overall Dimensions:-
        4)    Weight (including water):-
        5)    Type of Vibration Isolators:-
        6)    Approx. noise level (db):-
        7)    Drive belts & size (Flat, Belt, V-Belt):-
        8)    G.I. Casing Gauge:-
        9)    AHU body insulation material & thickness:-
        10)   Density of insulation material :-
        11)   Drain Tray Material :-
        12)   Drain tray insulating material & thickness:-
        13)   Whether inspection door provided for AHU body:-


II)     Fan Section:
        1)   Air handling capacity (CFM/CMH):-
        2)    Total static press (mm WG):-
        3)    Fan speed (r.p.m.):-
        4)    Nos. of Fan outlet & area:-
        5)    Fan diameter:-
        6)    Balance (Static and/or Dynamic):-
        7)    Bearings:-
        8)    Make & Mode of Fan.




                      - 68 -         - 68 -        - 68 -
III)   Filter Section:
       1)     Type:-
       2)    Gross filter area:-
       3)    Velocity through filter (F.P.M.):-
       4)    Press drop through filter when new (mm, W.G.):-
       5)    Efficiency:-
       6)    Filter material:-
       7)    Filter Casing Material & Gauge

IV)    Cooling Coil:
       1)    Coil fin material & thickness:-
       2)    Copper tube diameter & thickness:-
       3)    Water through coil (F.P.M.):-
       4)    No. of fins per inch:-
       5)    Water press drop in the coil (psig):-
       6)    coil Face area :-
       7)    Nos. of coils:-
       8)    No. of rows of each coil:-

V)     Drive Motor for AHU:
       1)    Make:-
       2)    Frame size:-
       3)    Insulation Class:-
       4)    HP/KW rating:-
       5)    Type


VI)    VALVES
1.     Butterfly Valve
       1]    Make :-
       2]    Model :-
2.     Gate Valve
       1]    Make :-
       2]    Model :-




                       - 69 -         - 69 -      - 69 -
VII)   Gauges

1.     Pressure Gauge

       1)    Make:-
       2)    Type:-

2.     Thermometers

       1)    Make:-
       2)    Type:-

VIII) Miscellaneous

1.     Insulation (Duct/Piping)
       1)    Make:-
       2)    Thickness & Density:-

2.     Piping
       1)    Make
       2)    Class of Pipe

3.     Ducting Sheet
       1)   Make of Sheet

4.     Anti Vibration Mounting
       1)    Type
       2)    Make

Note: Any other additional technical details may be included by the
     tenderer.




                      - 70 -     - 70 -    - 70 -
       ACCEPTABLE/APPROVED MAKE OF MATERIALS


      Material                            Make


1. Galvanized Plane Sheets                Jindal/SAIL

2. Pipes                                  Tata/Jindal

3. Butterfly Valve/Ball Valve             AUDCO

4. Gate Valve                             Leader

5. Globe Valve                            Leader/AUDCO

6. „Y‟/Plot Strainer                      TrishuL/Emerald

7. Non Return Valve                       AUDCO/C&R

8. Gauges                                 H Guru/Star Scientific

9. Thermometers                           H Guru/Star Scientific

10. Pipe Insulation                       Beardsell/Lloyds/
                                          Phenotherm

11. Duty Insulation                       Owens Corning/Beardsell/
                                          U P Twiga

12. Electrical Motor                      Siemens/Crompton/ABB

13. Anti Vibration Maintenance            RMS Corporation/Dunlop




                       - 71 -    - 71 -      - 71 -
     TATA INSTITUTE OF FUNDAMENTAL RESEARCH
                 Technical Services


           TENDER DOCUMENT

   Replacement of very old Air Handling Units with
Supply, Installation, Testing & Commissioning of New
  Single Skin AHUs along with associated ducting,
insulation, piping, valves etc. at TIFR, Colaba, Mumbai




        - 72 -       - 72 -     - 72 -
                           CONDITIONS OF TENDER



1.    Quotations must be submitted in duplicate giving complete details; in
      particular, the offers should clearly specify applicable taxes, make, offered,
      warranty/guarantee terms, delivery period and delivery charges, if the price is
      ex-works/ex-Godown/ex-shop.

2.    Quotation should be valid for a period of 120 days from the date of
      opening of the tender.

3.    Tenders in sealed envelopes duly superscribed with the Tender No.
      and due date, shall be addressed to the Purchase Officer, Tata Institute
      of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai – 400
      005.

4.    Tenders will be opened in the presence of attending tenderers on the
      date and time specified in the enquiry; in the event the due date
      declared is a holiday, the tender will be opened on the following
      working day.

5.    This tender documents/form is not transferable.

6.    Tenders containing erasures or alterations will not be considered.

7.    Tenders which do not comply with the above conditions are liable to
      be rejected.

8.    The Institute will not defray any expenses whatsoever incurred by the Bidders
      for the preparation of bids.

9.    In case Bidder finds discrepancies or omissions from the specifications
      or other documents or has any doubt as to their meaning, he shall at
      once request in writing to the Purchase Officer, TIFR, who will for
      interpretation/clarification issue interpretation and clarifications as he
      may consider necessary in writing as an addendum. Copies of such
      addenda, if issued, shall be signed by the Bidder and shall form a part
      of his bid. Verbal clarifications given shall not be binding on the
      Institute.


10.   Before submitting the bids, the Bidders shall make themselves fully
      conversant with the technical specifications and other documents as
      attached so that no ambiguity arises at a later date in this respect.




                      - 73 -            - 73 -         - 73 -
11.   The owner reserves the right to postpone the date of submission and
      opening of bids.

12.   The bidders shall quote in English their rates/prices both in figures, as
      well as in words against each item of the work as detailed in the
      enclosed Schedule of Quantities. In the event of any discrepancy
      between the quoted rates/prices in words and that quoted in figures,
      the rates/prices quoted in words shall govern.

13.   The bidders must return the complete set of bid document. Each page
      of the bid document must be signed and dated by the bidder. Any bid
      not so signed and dated is likely to be rejected. All writing shall be in
      ink only. Any corrections in the entries in the Schedule of Quantities of
      this bid document, shall be initialed and dated by the bidder before
      submission of the bid. No parts of the bid document shall be altered,
      overwritten or amended by the Bidder

14.   The Institute shall be under no obligation to accept the lowest or any
      tender received in response to this tender notice and shall be entitled
      to reject any tender without assigning any reason whatsoever.




                     - 74 -          - 74 -        - 74 -
                   GENERAL CONDITIONS OF CONTRACT


1.0    Definition of Terms :

1.1.   In construing these general conditions and the specifications the
       following works shall have the meanings herein assigned to them
       unless there is something in the subject or context inconsistent with
       such works.

1.2    The term `Contractor‟/`Supplier‟/`Bidder‟/`Vender‟ shall mean the
       Tenderer whose tender has been accepted by the Owner and shall
       include the Tenderer‟s heirs, successors and assignees approved by the
       Purchaser:

1.3    The `Purchaser‟ shall mean Tata Institute of Fundamental Research,
       Homi Bhabha Road, Colaba, Mumbai – 400 005 and shall include the
       Purchaser‟s heirs, successors and assignees.

1.4    The term `Sub-Contractor‟ shall mean the firm or persons named in the
       contract for any part of the work or any person to whom any part of
       the work has been sublet with the consent in writing of the Engineer-
       In-Charge and shall include his heirs, successors and assignees
       approved by the Purchaser.

1.5    The Term `Inspector‟ shall mean any person appointed by/or on behalf
       of the Purchaser to inspect supplies, stores or work under the contract
       or any person deputed by the Inspector for the purpose.

1.6    The term `Particulars‟ shall mean, the following :

       a)    Specifications
       b)    Drawing
       c)    Sealed Pattern denoting a pattern sealed and signed by the
             Inspector.
       d)    Proprietary make denoting the produce of an individual firm.
       e)    Any other details governing the construction, manufacture
             and/or supply as existing for the contract.

1.7    The term `Engineer‟ shall mean Engineer, Central Services, Tata
       Institute of Fundamental Research, Colaba, Mumbai or some other
       person for the time being or from time to time duly appointed in
       writing by the Owner to act as Engineer for the purpose of the Contract
       or in default of such appointment the Purchaser.




                      - 75 -          - 75 -        - 75 -
1.8    The term `Specification‟ shall mean the specifications annexed to or
       issued with these Conditions of Contract.

1.9    The term `Site‟ shall mean the place or places at which the Equipment
       is to be delivered or work done by the Contractor shall include where
       applicable the lands and buildings upon or in which the works are to
       be executed and shall also include the place or places at which
       fabrication and other work is being carried out by the Contractor.

1.10   `Electrical Equipment‟, `Stores‟, `Work‟ or `Works‟ shall mean and
       include equipment and materials to be provided and work to be done
       by the Contractor under the Contract.

1.11   The `Contract‟ shall mean acceptance of the work order placed on
       contractor/supplier under section (2) of these conditions and shall
       include these conditions of Contract, Specifications, Schedule,
       Drawing, Letter of Intent of the Purchaser and any subsequent
       amendments mutually agreed upon.

1.12   `Tests on Completion‟ shall mean such tests are prescribed by the
       specifications or have been mutually agreed to between the
       Contractor/Supplier and the Purchaser to be made before the
       equipment is taken over by the Purchaser.

1.13   `Writing‟ shall include any manuscript, typewritten or printed
       statement under or over signature or seal as the case may be. Words
       importing `person‟ shall include firms, companies, corporations and
       association of individuals whether incorporate or not.

1.14   Words importing singular shall also include plural and vice versa
       where context requires.

2.0    Contract:

2.1    Contractor/Supplier should send their acceptance letter on receipt of
       `Letter of Intent‟ or work order within stipulated period. On expiry of
       said period or exorbitant delay in commencing or executing the work,
       the Purchaser shall not be liable to any claim from the Contractor/
       Supplier for work entrusted to and may revoke the contract.




                      - 76 -         - 76 -        - 76 -
3.0   Work at Site:

3.1   The contractor should ensure that his people follow safe practices at
      work.

3.2   Access to the works shall be allowed only to the Contractor/Supplier,
      Sub-Contractors or his duly appointed representatives.             The
      Contractor/ Supplier shall not object to the execution of work by other
      contractors or tradesman and shall afford them every facility for
      execution of their several works simultaneously with his own.

3.3   Work at the Purchaser‟s premises shall be carried out at such time as
      the Purchaser may approve but the Purchaser shall give the
      Contractor/ Supplier all reasonable facilities for the same. The
      Contractor/Supplier shall provide sufficient fencing, notice boards etc.
      to guard the works and warn the public.

3.4   The Contractor shall obey Central, local and State regulations and
      enactment pertaining to workmen and labour and the Engineer shall
      have the right to enquire into and decide all complaints on such
      matters.

4.0   Delays:

4.1   The Contractor shall not be entitled to any compensation for any loss
      suffered by him on account of delays in commencing or executing the
      work, whatever the cause for such delays may be, including delays in
      procuring Government controlled or other materials and delay in
      obtaining instructions and decisions from Engineer-In-Charge. The
      Contractor shall, however, merit extension of time as hereinafter
      mentioned.

5.0   Taking Over:
      The equipment when erected at site shall be deemed to have been
      taken over by the Purchaser when the Engineer will have certified in
      writing that the equipment has fulfilled the contract conditions.




                      - 77 -         - 77 -       - 77 -
6.0   Extension of Time:

6.1   If the Contractor is delayed in the progress of work by changes ordered
      in the work, or by any cause, which the Engineer shall decide to justify
      the delay, then the time of completion shall be extended by a
      reasonable time. No such extension shall be allowed unless requests
      for extension are made in writing by the Contractor/Supplier to the
      Engineer within 15 days from the date of occurrence of the delay.

7.0   Other Damages:

7.1   The Contractor/Supplier shall be responsible for all injury to persons,
      animals or things and for all damage to the works, structure of, and
      decorative work in the property which may arise from operation or
      neglect of himself or any of his Sub-Contractor or of his or Sub-
      Contractor‟s employees, whether such injury or damage may arise
      from carelessness, accident or any other cause whatever in any way
      connected with the carrying out of this contract. This clause shall be
      held to include any damage to buildings, whether immediately
      adjacent or otherwise, any damage to roads, streets, foot paths, as well
      as all damage caused to the works forming the subject of this contract
      by frost or other inclemency of weather. The Contractor/Supplier shall
      indemnify the Purchaser and hold him harmless in respect of all and
      any expenses or property as aforesaid and also in respect of any claim
      made in respect of injury or damage under any acts of Government or
      otherwise and also in respect of any award of compensation or
      damages consequent upon such claim.

7.2   The Contractor/Supplier shall reinstate all damage of every sort
      mentioned in this clause, so as to deliver up the whole of the contract
      works complete and perfect in every respect and so as to make good or
      otherwise satisfy all claims for damage to the property of third parties.

7.3   The Contractor/Supplier shall indemnify the Purchaser against all
      claims which may be made against the Purchaser, by any member of
      the public or other party, in respect of anything which may arise in
      respect of the works or in consequence thereof and shall, at his own
      expense, effect and maintain, until the work has been „taken over‟.




                     - 78 -          - 78 -        - 78 -
7.4   The Contractor/Supplier shall also indemnify the Purchaser against all
      claims which may be made upon the Purchaser whether under the
      Workmen‟s Compensation Act or any other statute in force during the
      currency of this contract or at common law in respect of any employee
      of the Contractor/Supplier or of any of his sub-contractor and shall at
      his own expense effect and maintain until the work has been `Taken
      Over‟, with an approved office.


7.5   The Purchaser, with the concurrence of the Engineer, shall be at liberty
      and is hereby empowered to deduct the amount of any damages
      compensation costs, charges and expenses arising or accruing from or
      in respect of any such claims or damages from any sums due to or
      become due to the Contractor/Supplier.




                     - 79 -          - 79 -       - 79 -
                 GENERAL INFORMATION TO BIDDERS


1.    On behalf of Tata Institute of Fundamental Research (hereinafter
      referred to as the Institute) bids are invited for design, supply,
      installation, testing & commissioning of Air- Conditioning system for
      INO Laboratory with associated ducting, Insulation, refrigerant piping,
      cabling etc at TIFR on Homi Bhabha Road, Navy Nagar, Colaba,
      Mumbai-400 005.

2.    The Air-conditioning system shall be installed in stand alone
      Laboratory building. The Laboratory building is situated near the
      Animal House. It is only a ground floor structure.

3.    It is important that the bidder must satisfy himself before quoting that
      the space provided is adequate for installation of his plant along with
      all equipments and accessories as no extra space can be provided. The
      tenderers must visit the site and take the actual measurement before
      quoting. The bidders shall furnish a fully dimensioned layout for his
      Package unit, with all equipment and accessories along with quotation.

4.    Bidder shall furnish the data called for in data sheets and the schedules
      in the standard Proforma to facilitate correct evaluation of his bid in a
      most expeditious manner. It is in the interest of the bidder to submit
      the bid in above manner with complete technical details, failing which
      it is likely that his bid may not be considered.

5.    Bidder shall be deemed to have carefully examined the specification in
      its complete form and to have fully informed and satisfied himself as to
      the details, nature, character and quantities of the work to be carried
      out, site conditions, and other pertinent matters and details.

6.     It is the intent of the owner/purchaser to incorporate these
       specification documents in the final contract order for the supply of
       material, equipment and services. Bidders are required to review
       these documents and clearly state in their proposals the acceptance of
       the same. Exceptions, if any shall be clearly stipulated in appropriate
       bidding schedule. The final contract between purchaser and vendor shall be
       subjected to such changes, if any, mutually agreed upon by purchaser and
       vendor and included in the main text of the contract/order.

7.    Bidder shall clearly specify all the deviations with respect to this
      specification in the appropriate schedule.


8.     SCHEDULE OF QUANTITIES TO BE FURNISHED BY VENDORS

8.1    All equipments mentioned in the enclosure should conform to the
       respective technical specifications. Only main items of the tender
       have been brought out specifically in this schedule, however all


                     - 80 -          - 80 -         - 80 -
         accessories as per specification or otherwise should be furnished at
         the time of quotation with cost of individual item.

8.2      Tenderers are required to fill in unit rates for all the items mentioned
         in the enclosure and any additional items quoted by them in the
         Financial Bid. In absence of the unit rates, the offer may be
         considered as invalid.

8.3     All the equipments supplied shall be as per the „List of Approved
        Make‟ attached .


9.       ITEMS TO BE FURNISHED BY THE PURCHASER:

9.1      Following shall be furnished by the purchaser:

9.1.1    Building, foundations and trenches.

9.1.2    Water and power for testing and commissioning.

10.      SERVICES SUPPLIED BY PURCHASER DURING ERECTION:

         The purchaser will provide for the contractor following services
         during the performance of work.

10.1     Temporary electric power at 415 V, 3 ph., 50 Hz at one point only
         which will be within 50 M of location of works free of cost. Water
         shall be provided free of cost for testing and commissioning.

10.2     The contractor shall make his own arrangement for supply, erection
         and dismantling on completion of works of his temporary
         distribution system, distribution panels and other equipments he
         may require to take the power from the purchaser's supply points.

10.3     The contractor's temporary distribution system shall be subjected in
         every respect to the approval of the purchaser and shall be arranged
         so as to avoid any interference with other operations on the site.

10.4     The purchaser will not hold himself responsible for the consequences
         of any interruptions to the continuity of the power supply or power
         system voltage and frequency fluctuations.

10.5     The electric power shall not be used for heating purposes.

10.6     Electrical power made available to the contractor, during testing and
         commissioning for the refrigeration unit is free of charge.

10.7     There is no EOT crane or mono rail to assist in erection work.
         Tenderer should provide suitable derricks & tripods for lifting heavy
         load.


                       - 81 -          - 81 -        - 81 -
11.    SERVICE SUPPORT, SPARES & TOOLS:

11.1   The bidder shall provide in detail the Service Support Set-up in
       Mumbai of the manufacturer or himself and lead time for
       replacement of faulty parts and for providing technical service.
       The entire system will be on comprehensive AMC with the
       supplier after the expiration of the guarantee period.

11.2   The tenderer shall furnish complete set of tools & wrenches for
       making adjustments, repairs & preventive maintenance including
       those required for erection.

12     COMPLETION DRAWINGS (FINAL DRGS) & MANUALS:

12.1   The contractor shall submit tracings in original with five prints of all
       installation drawings based on which equipments are installed &
       commissioned.

12.2   Contractor shall supply the following literature in four sets:
           a.      Start-up, operation and maintenance instructions of Air-
                   conditioning unit and its parts.
           b.      Installation instructions.
           c.      Field wiring diagrams.
           d.      Operation and Maintenance Manual of electrical parts
                   used in the same.

.




                     - 82 -          - 82 -        - 82 -
             INSTRUCTIONS TO BIDDERS & SPECIFIC
               NON-TECHNICAL REQUIREMENTS


1.   The details in respect of Earnest Money, Security Deposit

     a)    Earnest Money Deposit:
           Bidder must deposit Rs. 60,000/- towards EMD along with the
           tender failing which tender will be rejected. EMD will be
           accepted in the form of Bank Draft only favouring Registrar,
           TIFR, Mumbai.

     b)    Security Deposit:
           5% (i.e. five percent) of the gross value of the work will be
           deducted from the Contractor‟s bill towards Security Deposit.

     c)    Refund of Security Deposit:
           The Security Deposit (5%) will be refunded to the contractor
           after the expiry of defect liability period.

     d)    Defect Liability Period:
           12 (twelve) calendar months from the date of Institute‟s
           satisfactory completion certificate will be taken as defect liability
           period.

     e)    Bidders other than successful bidder will be refunded the EMD
           submitted by them within 12 months from the date of opening
           of the tender and no interest shall be paid against the said
           deposit.

     f)    In case the successful bidder fails to undertake the said work,
           his EMD amount will be forfeited.

     g)    The EMD paid shall be part of Security Deposit, i.e. 5% of the
           Contract value which will be refunded after expiry of Defects
           Liability period.

2.   No interest will be payable on the deductions towards Security
     Deposit/ Earnest Money.

3.   The Bidder shall submit the copy of their PAN card.




                    - 83 -          - 83 -         - 83 -
4.    Prices and rates quoted shall include cost of all materials, labour, plant,
      equipment, temporary work, tools, setting out, supervision, transport,
      taxes, royalties, octroi and any local tax or levy payable on all
      transactions, insurance and everything necessary for due performance
      of work under this contract.

5.    Prices and unit rates shall be valid even if the contract is split.

6.    Contract should be fixed rate contract. No escalation in prices of the
      materials during the currency of the contract is permitted. However
      any statutory variations like change in excise duty, taxes etc. if levied
      after award of the work shall be paid on production of proof of such
      changes. .

7.    a)     Site Visit:
             The bidders may like to visit the work site before submitting
             their bids to get conversant with site conditions, which may
             affect the work.

      b)     Location of Site:
             Tata Institute of Fundamental Research
             Navy Nagar, Colaba, Mumbai-400 005

8.    The work should be completed within 6 months from the date of issue
      of Purchase Order.

9.    Work shall commence at site within 2 months from the date of issue of
      letter of Purchase Order.

10.   The Contractor should plan and give his daily program for execution
      of work in advance so that no disturbance is created in the routine
      working of the Institute.

11.   Turnover Tax/Works Contract Tax:
      Turnover tax applicable to this contract shall be mentioned clearly and
      included by the bidder in his bid. No claim shall be entertained by the
      owner thereafter.
12.   Date of Taking Over:
      Site shall be deemed to have been taken over by owner when Engineer
      In-Charge certifies the completion of work in all respect as per tender
      conditions and specification.




                      - 84 -           - 84 -         - 84 -
13.   Income Tax as per the prevailing rates will be deducted from the
      progressive bills.
14.   The contractor shall not without the consent in writing of the Owner
      assign or sublet the contract.
15.   No labour below the age of 18 years shall be employed at site.
16.   Contractor shall be liable to pay workman compensation to his labour
      as per prevailing rules for any accident occurring at our site.
17.   The contractor shall pay wages to his workmen as per the Statutory
      Minimum Wages Act.
18.   The Contractor shall provide all risk insurance for his men, material
      and machines and absolve us of all risk and liabilities whatsoever
      pertaining to his men, material and machines.
19.   The Contractor will arrange for photo passes of his personnel and get
      the same endorsed by our Establishment/Security Department before
      beginning the work.
20.   The Contractor will ensure that his workmen follow safe practices at
      Work.
21.   The Contractor will work from 8.00 a.m. to 6.00 p.m.
22.   No labour camp etc. will be allowed to be put up inside or in the
      vicinity of the Institute.
23    Any dispute arising from this contract will be referred to two
      arbitrators one to be appointed by you and one by us. The two
      arbitrators, in the event of their disagreement will appoint an Umpire.
      The decision of the Umpire shall be final and binding. The arbitration
      will proceed as per Indian Arbitration Act, 1940, as amended up to
      date.
24.   The contractor should ensure that his engineer/supervisor is present
      at site throughout the progress of works till completion.
25.   Terms of Payment:
      Payment of pipe lines shall be made as per unit length i.e. per running
      mtr./feet.
25.1.1 Unless otherwise agreed to in writing between the Purchaser and the
       Contractor/Supplier, payment for the delivery of the equipment
       approved by the Inspector will be made as follows:
a)          70% of the Contract value against delivery, prorata of the value
            of goods delivered and after checking the same at site.
b)          15% on completion of erection.
c)          10% on commissioning and final inspection and testing at site.
d)          5% against PBG valid for 12 months from the date of handing
            over or after expiry of the Defect Liability period as stated in
            Clause 1d) page 11.




                     - 85 -         - 85 -        - 85 -
26.   The bidder should submit technical data sheet, drawings, any other
      technical detailed asked for in the tender with Part II i.e. Technical Bid
      of the Tender.
27.   The schedule of quantities and rates shall be read in conjunction with
      the specification, tender drawings, other tender documents, relevant IS
      Codes, Engineering hand books, etc. the Contractor shall not rely
      merely on the description given in the Schedule of Quantities.

28.   The quantities mentioned in “Bill of Quantities” are estimated
      quantities. However the payment shall be made as per actual quantities
      measured at site, after completion of work.

29.   Contractor will be fully responsible for lifting, shifting and handling
      Institute‟s properties such as any articles and materials lying nearby to
      proper place as instructed by Site In-Charge.

30.   All the materials used shall be used only after approval and tests of the
      Engineer-In-Charge as per specifications.
31.   All the debris shall be removed by the Contractor at his cost to any
      nearest BMC approved dumping yard.
32.   Storage and custody of material, till the time of handing over to TIFR,
      shall be the responsibility of contractor.
33.   The contractor after award of work, should submit detailed schedules
      showing program and order in which contractor proposes to carryout
      the work with dates and estimated completion time for various parts of
      work. This should be submitted in the form of Bar-chart.
34.   The Engineer can instruct the contractor to make any alteration,
      omission, or variation in work. The difference in cost due to instruction
      shall be added or deducted from contract price as the case may be in
      accordance with the rate applicable in the contract.
35.   DEVIATION FROM THE SPECIFICATIONS:
      The Contractor must tender for the equipment as herein specified
      but may submit alternate proposals for modifications to details where
      such modifications offer technical advantages and will make cost
      savings to the owner. The basis and details of calculations of
      operating cost and the net expected final saving shall be indicated
      wherever such a claim is made. The acceptances or otherwise of
      alternate proposal/deviations/ modifications etc. will be decided
      solely by the owner.

36.   Inspection of Material & Equipment:
      Supplier shall arrange for inspection/testing of AHUs at his works.
      TIFR will have liberty to inspect/test the parts of AHUs during the
      manufacturing/assembly. No charges will be paid extra towards
      inspection/testing. The bidder shall make necessary arrangements for
      travel, boarding & lodging for 3 engineers of TIFR deputed for
      inspection & testing of the AHUs at manufacturer‟s premises.
                     - 86 -         - 86 -       - 86 -
- 87 -   - 87 -   - 87 -
              BASIS OF DESIGN & SCOPE OF WORK

 1.1   Design Parameters for selection of air handling unit & its components
       shall be:

       Maximum face velocity across prefilter -         400 – 450 Ft./Min.
       Maximum face velocity across coils        -      450 – 500 Ft./Min.
       Maximum fan outlet velocity               -      1600 Ft./Min.
       Maximum fan speed                         -      800 RPM
       Maximum fan motor speed                   -      1500 RPM


1.2    Piping shall be sized for the following design parameter

       Maximum flow velocity                     -      8 Ft./Sec.
                                                        = 2.5 Mtrs./Sec.
       Maximum friction                          -      5 Ft. per 100 Ft. run

1.3    Design parameters for duct design shall be

       Max. flow velocity [S.A. Duct]            -      1200 Ft./min.
                                                        = 365 Mtr./min.

       Max. flow velocity [R.A. Duct]            -      800 Ft./min.
                                                        = 240 Mtrs./min.

       Max. friction drop                        -      0.1” WG/100 Ft. run
                                                        = 1 cm WG/100 M run

       Max. velocity at supply air diffusers     -      500 Ft./Min.
                                                        = 150-200 Mt./Min.

2.0    The proposed new AHUs will be put after replacing the old AHUs,
       which are in running position. The contractor shall have to carry out
       the work in short span of time (during shut down), preferably during
       weekends including Sunday. The contractors need to work day and
       night to ensure minimum disturbance to users.
3.0    The contractor should inspect the site before quoting and ascertain for
       himself the nature, character and extent of work to be executed and
       should include all items and services necessary, whether specially
       mentioned or not in the specifications, scope etc. to meet with the
       intent and purpose of these specification.




                      - 88 -            - 88 -       - 88 -
4.0    After award of work contractor should submit the GA drawing as well
       as data sheet of AHU, parts etc. for engineer‟s approval. He shall start
       the manufacturing only after the approval.
5.0    All AHUs with the motor above 5 HP should use the flat type belt for
       transmission of power (“Habasit-Iakoka” make flat belt only). Below 5
       HP motor, a regular V-type belt of Fenner make should be provided.
6.0    The static pressure & air flow rate mentioned in the tender are
       maximum for the purpose of designing the components. However it is
       contractor‟s responsibility to prove the airflow rate at the time of
       commissioning. He can use V belt pulley at initial stage and later on
       replace with flat belt once system stabilizes.
7.0    During the replacement of AHU contractor shall cut/modify the
       existing header/coil connection as per the new requirement. The new
       piping shall be paid on RMT basis as per the tender rate. Similarly
       ducting connection includes cutting/modifying the existing ducting
       including making new plenum, if necessary. The new ducting shall be
       paid on Sqft basis as per tender rate.
8.0    The manufacturer of AHU should have the single space for assembly &
       testing of AHU preferably at his work, where different section of AHU
       like casing, coil etc. manufactured.
9.0    Supplier shall arrange for inspection/testing of AHU at his works.
       TIFR will have liberty to inspect/test the parts of AHU during the
       manufacturing/assembly of AHU. No charges will be paid extra
       towards inspection/testing. The bidder shall make necessary
       arrangements for travel, boarding & lodging for 3 engineers of TIFR
       deputed for inspection & testing of the AHUs at manufacturer‟s
       premises.
10.0   Ceiling suspended type AHU should have intermediate anti vibration
       device to stop transmission of vibration to ceiling.
11.0   There are various sizes of insulated piping in the institute on which the
       layers of sand cement plaster required. Bidder should quote his rate of
       sand cement plaster of various sizes as per item no. 16 of BOQ.
12.0   Spare Motor with pulley shall be provided on extended shaft for Two
       AHUs (23500 CFM & 9000 CFM Catering to Pelletron Building)
13.0   Power supply shall be given by TIFR at AHU motor as per requirement
       but the termination at motor end (With Copper Lugs) shall be in the
       scope of contractor.
14.0   Out of eight AHUs, 4 AHUs of Pelletron block, one AHU for `C‟ Block
       Mezzanine & one AHU (ceiling suspended) of Pent House are to be
       replaced on one to one basis, whereas the remaining two AHUs
       capacity have been changed. It is the responsibility of successful bidder
       to prove the capacity of each AHU. Mere quoting on the basis of
       tender will not absolve the successful bidder from proving the capacity
       of AHUs.




                      - 89 -          - 89 -        - 89 -
15.0   All welding must conform to the requirements of applicable IS
       standards. All welding procedures and details shall be subject to the
       approval of Engineer In-Charge. All necessary arrangements for
       working at heights above the floor level like scaffolding, rope etc. shall
       be arranged by the Contractor. All materials, equipments, tools &
       tackle, shifting and lifting arrangement and other necessary items
       required to carry out the work shall be arranged by the Contractor. All
       other necessary equipments, arrangements like welding machine, gas
       cutter, welding rods, drill bits, drilling machine, grinder, gas cylinders
       for gas cutting etc. shall be arranged by the Contractor. Electricity &
       water needed for carrying out the work shall be provided free of cost
       by TIFR.

16.0   The Contractor shall make arrangements to store his tools, equipments
       etc. in his own tool box having proper locking arrangements. Material
       required for carrying out the work such as flanges, nuts and bolts,
       rubber gasket, pipes etc. shall be provided by the Contractor. All the
       above material shall be of high standards and subjected to the approval
       of the Engineer In-Charge.

17.0   The work shall be carried out with least disturbance to the users.
       The shut down if any required for carrying out the works shall be
       minimum and advance intimation to be given. Shut down periods
       will be intimated for the work to be taken up after obtaining the
       necessary approval form the Users.

18.0   The Contractor shall inspect the site and ascertain for himself the
       nature and extent of work to be executed and shall include all the
       items and services necessary whether specifically mentioned or not
       in the tender specification, drawing, so as to meet the intent and
       purpose of this specification.




                      - 90 -          - 90 -        - 90 -
                     TECHNICAL SPECIFICATIONS

1.    SCOPE :
      The scope of this section comprises the supply, installation, testing and
      commissioning of single skin air handling units of the size and capacity
      set forth in the Schedule of Equipment.

2.0   CABINET TYPE:
2.1   The unit shall be of sectionalized construction consisting of Fan section,
      coil section, Filter section and drain pan.

2.2   Metallic casing shall be fabricated from 16 Gauge galvanized sheet
      steel ribbed and reinforced for structural strength and rigidity. 16
      Gauge hot section channels shall be used for reinforcing .It shall be
      sectionalized construction with proper sealing at the joints to make the
      joints air tight. Fan section and panels with bearing supports shall be
      reinforced with heavy gauge channels. For AHUs supported on floor,
      leg packages shall be provided for attachment to the Fan and Filter
      sections, raising the height by 350mm. All edges shall be formed inter
      locking to stiffen and support the weight and shall be secured with
      galvanized nuts and bolts.

2.3   Fan impeller shall be of forward curved blade centrifugal type.
      Impeller shall be of double width double inlet type. Two or three
      wheels shall be provided for each AHU. Blower section (includes
      Scroll, impeller blades, etc.) shall be fabricated from 16 gauge
      galvanized sheet steel. Fan housing shall be made of die formed side
      sheets with stream lined inlet and guide vanes to ensure smooth air
      flow into the fans. Fan shaft shall be of solid cold rolled carbon steel,
      ground and polished. The whole assembly shall be statically and
      dynamically balanced for smooth operation.
      Fan shaft bearing shall be of heavy-duty type selected for an average
      operating life of 100,000 hours. Bearing shall be self-aligning type. They
      shall be permanently lubricated. Bearing housing shall be fabricated
      from malleable iron and suitably supported from outside.

       Fan motor shall be mounted on an adjustable sound isolating base
      located on the top surface above the AHU.

2.4   Cooling Coils shall be of the fin and tube having Aluminum fins firmly
      bonded to Copper tube (Seamless solid drain). Capacity of the coil
      shall be as required under the Schedule of Equipment. Velocity of air
      across coil face shall not exceed 500 CFM. Tube shall be of 5/8” O.D.
      and with 10-12 fins per inch. Coils shall be tested at 300 psig Nitrogen
      pressure in presence of our engineers. Shut off valve (Butterfly type)
      at the inlet and outlet of coil to be provided. Proper purging and drain
      arrangement to be made on header of coil. Copper tube gauge



                     - 91 -          - 91 -         - 91 -
       thickness shall not be less than 20 SWG. Aluminum fins gauge shall
       not be less than 32 G. Fin punching profile must follow full length air
       of contact with tube and must be turned at edges to increase rigidity
       and contact.

       Drain pan shall be constructed of 18 G stainless steel with sandwich
       type insulation in-between bottom plates. Necessary support shall be
       provided to slide the coil in the drain pan. Outlet shall be provided on
       both the side of drain pan. An extension drip pan shall be provided at
       proper location outside the casing to catch all drip from external coil
       connections and valves.
       End panel of the coil section casing shall be removable for withdraw of
       the coil and shall be provided with opening for coil connections.

2.5    Filters shall be cleanable viscous metal AL box type and shall be 50 mm
       thick. The filter shall be hold with stiffeners in-between made out of
       hollow SS material.

2.6    Suitable, easily openable service door (for Internal Maintenance)
       between coil section and fan section to be provided to enable a
       person to enter inside

2.7    Unit shall be thermally and sound insulated as in section “Insulation”

2.8    Spring type Anti Vibration Mounting of approved make shall be
       provided as vibration isolators.

2.9    Sheet metal fresh air louvers with frame, damper, etc. shall be
       provided in the clear opening in masonry made by the owner.

2.10   The Unit cost shall be complete with all accessories, including the
       following:
       1] Manual air vents at high point and drain at low point. 2] Water
       Thermometers at Inlet & Outlet.3] Pressure gauges with siphon cocks
       at Inlet & Outlet. 4) Canvass Connection

3.     PERFORMANCE DATA & TESTING:
       Air handling units shall be selected for the lowest operating noise level
       of the equipment for performance rating and power consumption data
       with operating points(On Fan Curve) clearly indicated shall be
       submitted with the tenders and verified at the time of testing and
       commissioning . The following test result shall be furnished during
       commissioning in the presence of department‟s Engineer;

       a) Air Side
            Air Flow Rate in CFM or Cub.M per hour
            Static pressure in mm wg
            Entering Dry bulb & Wet bulb temperature
            Leaving Dry bulb & Wet bulb temperature


                      - 92 -          - 92 -        - 92 -
     b) Water Side
         Inlet temperature in degree C
         Outlet temperature in degree C
         Pressure drop in psig

4.   PAINTING:
     Unit shall be painted with approved type of Epoxy paint (minimum
     two coats)

5.   CODES & STANDARDS FOR AIR HANDLING UNIT:
     The design, manufacture and performance of AHU shall comply all
     currently applicable statutes, regulations and safety codes in the
     locality where the equipment will be installed. The equipment shall
     also conform to the requirements of the latest editions of applicable
     Indian/U.S.A. standards. Nothing in this specification shall be
     construed to relieve the vendor of this responsibility. In particular the
     equipment shall conform to the latest editions of the following
     standards:

a)   ANSI 89.1    Safety code for mechanical refrigeration.
b)   IS:659       Safety code for air-conditioning.
c)   IS:660       Safety code for mechanical refrigeration.
d)   AHRAE        Standard-33 methods of testing for rating forced
                  Circulation air-cooling and air heating coils.
e)   ARI-410      Standard for forced circulation air cooling and air
                  Heating coils.

     G.I. insulated condensate drain piping with drain valve, upto sump or
     floor drain within the air handling unit room. The drain shall be
     provided with proper „U‟ loop. Only piping and valve shall be
     measured and paid at unit rate.

6.   PERFORMANCE DATA:
     Air handling units shall be selected for the lowest operating noise level
     of the equipment. Fan performance rating and power consumption
     data with operating points clearly indicated shall be submitted with
     the tenders and verified at the time of testing and commissioning of
     AHU.




                    - 93 -          - 93 -        - 93 -
      SHEET METAL WORK
1.0   SCOPE:

1.1   The scope of this section comprises the supply and installation of all
      sheet metal ducts.

1.2   MATERIAL:

1.2.1 Ducts shall be made of galvanized steel sheets. The galvanized steel
      sheets shall conform to IS 277-1965 with 200gsm Zink coating.

1.2.3 The thickness of sheets shall be as given below:

Dimensions     Gauge       Gauge      Type of Joints           Type of Bracings
of ducts        G.I.        Al

Upto 600        24              22   G.I. Flange at        Cross bracings.
                                     2.5 centre

601 to 750      24              22   25 x 25 x 3 mm   25 x 25 x 3 mm MS
                                     Angle iron frame angles bracing at 1500
                                     With 6 mm dia. mm from joints
                                     Nuts & bolts

751 to 1000     22          20       25 x 25 x 3 mm   25 x 25 x 3 mm MS
                                     Angle iron frame angles bracing at 1500
                                     With 6 mm dia. mm from joints
                                     Nuts & bolts

1001 to 1500    22              20   40 x 40 x 5 mm   40 x 40 x 3 mm MS
                                     Angle iron frame angles bracing at 1500
                                     With 8 mm dia. mm from joints
                                     Nuts & bolts

1501 to 2250    20              16   50 x 50 x 3 mm        40 x 40 x 3 mm MS
                                     Angle iron to be      angle bracing at
                                     Cross braced          1200 mm from joints
                                     diagonally with       or 40 x 40 x 3 mm MS
                                      10 mm dia. nuts      angle diagonal bracing
                                     and bolts at 125
                                     centre.

2250 & above    18              14   50 x 50 x 6 mm        50 x 50 x 3 mm MS
                                     Angle iron 10         angle bracing at
                                     mm dia. nuts          1200 mm from joints
                                     and bolts at 125      or 50 x 50 x 3 mm MS
                                     centre.               angle diagonal bracing


                       - 94 -        - 94 -           - 94 -
HANGERS FOR DUCT:

Duct Size      Spacing            Size of MS equal angle     Size of rod dia
 [mm]           [M]                   [mm x mm]                   [mm]

Upto 750         2.5                     40 x 3                     10

751 to 1500      2.0                     40 x 3                     12

1501 to 2250     2.0                     50 x 3                     15

2251 to above    2.0                     50 x 3                     15

      All the MS angle, use for duct support & brazing etc, shall be hot dip
      galvanized

1.4   DAMPERS:

1.3.1 All dampers shall be louver dampers of robust construction & tightly
      fitted. The design, method of handling and control, shall be suitable
      for the location and service required.

1.3.3 Dampers shall be provided with suitable links, louvers and quadrants
      as required for their proper operation, control or setting in any desired
      position. Dampers & their operating devices shall be made robust,
      easily operable and accessible through suitable access doors in the
      ducts. Every damper shall have an indicating device clearly showing
      the damper position at all times.

1.3.3 Dampers shall be placed in ducts & on main supply or return air duct
      for the proper volume control and balancing the system.

1.4   GRILLS & DIFFUSERS:

1.4.1 All side wall supply air grills shall be similar and equal to Tuttle and
      Bailey Triflox T 647 double deflection register with approved damper.
      Supply air grills shall be provided with vertical and horizontal
      adjustable bars and volume control multi-louver damper that shall be
      key operated from the front of the grills.

1.4.2 All return air grilles shall be similar & equal to Tuttle & Bailey
      Aerovane 770D grills.




                         - 95 -      - 95 -        - 95 -
1.5   INSTALLATIONS:

1.5.1 The duct fabrication & installation shall generally conform to I.S. 655-
      1963.

1.5.2 The contractor shall provide and neatly erect all sheet metal work or as
      may be required to carry out the intent of these specifications and this
      shall meet with the approval of the Engineer in all its parts and details.

1.5.3 All necessary allowances and provisions shall be made by the
      contractor for beams, pipes or other obstructions in the building.
      Where necessary to avoid beams or other structural work or plumbing
      or other pipes or conduits the ducts shall be transformed, divided or
      curved to one side, as approved or directed by the Engineer.

1.5.4 All metal work in dead or furred down spaces shall be erected in time
      to cause no delay to other contractors in the building.

1.5.5 Ducting over furred ceiling shall be supported from the slab above, or
      from beams. In no case shall a duct be supported from the ceiling
      hangers or be permitted to rest on a hung ceiling.

1.5.6 If a duct cannot be run as decided, the Contractor shall install the duct
      between the required point by any path available, subject to the
      approval of the Engineer.

1.5.7 All ducts shall be rigid and shall be adequately supported and braced
      where required with standing beams, tees or angles of ample size to
      keep the ducts true to shape and to prevent buckling, vibration or
      breathing.

1.5.8 All joints shall be made tight and all interior surfaces shall be smooth.
      Bends shall be made with radius not less than ½ the width of the duct
      or with scientifically designed interior curved vanes, as approved. The
      vanes shall be so spaced that the aspect ratio of each of the individual
      elbow formed by the vanes will be about five.

1.5.9 All sheet metal connections, partitions & plenums required to confine
      the flow of air to and through the filters and fans, shall be constructed
      of 18 G galvanized Iron, thoroughly stiffened with 1” x 1” angle Iron
      braces and fitted with all necessary doors as required by the Engineer,
      to give access to all parts of the apparatus. Doors shall be not less than
      18” x 20” in size.

1.5.10 Where metal ducts or sleeves terminate in wood work, brick or
       masonry openings, tight joints shall be made by means of closely fitted
       heavy flanged collars.

                      - 96 -          - 96 -        - 96 -
1.5.11 Air handling units shall be connected to duct work by inserting at air
       inlet and air outlet a double canvas sleeve. Each sleeve shall be
       minimum 4” long securely bonded and bolted to duct and units. Each
       sleeve shall be made smooth and the connecting duct work rigidly held
       in line with unit inlet or outlet.

1.6    INSULATION:

1.0    SCOPE:

1.1    The scope of this section comprises the supply and application of
       insulation as herein specified.

2.0    COLD INSULATION:

2.1    All pipes, ducts & equipments operating at temperature lower than the
       ambient shall be insulated in the manner specified hereinafter.

2.2    The insulating material shall be as follows:

       f)     Pipes:
              Rigid preformed sections of expanded polystyrene of uniform
              density of 24 Kgs./m3 with a `K‟ value of not more than 0.23
              B.T.U/ Hr./In/Sq.ft./0F at 500F mean temperature.

2.4    No insulation shall be applied on pipes until the pipes are satisfactorily
       tested.

       Thickness of pipe insulation shall be 50mm.

2.5    Pipe insulation shall be applied as follows:
  a)   Pipes shall be thoroughly cleaned with wire brush and rendered free
       from all rust and grease.

  b)   Two coats of bitumen shall be applied on the cleaned pipe surface.

  c)   Rigid pipe sections of insulation shall be fixed tightly to the surface
       taking care to seal all joints and covered with Polythene sheet.

  d)   24 G x 20 mm mesh wire netting shall be applied, butting all joints and
       shall be laced down with G.I. wire.

  f)   Insulated surface shall be finished with two layers of sand cement
       plaster. Each layer shall be not less than 7 mm thick.



                      - 97 -          - 97 -          - 97 -
2.5   All valves, fittings, strainers etc. in chilled water piping shall be
      insulated to the same thickness as specified for the main run of piping.
      Valve bonnets, yokes and spindles shall be insulated in such a manner
      as not to cause damage to insulation when the valve is used or
      serviced.

2.6   Cabinet air handling units shall be insulated as follows.
      Fans & coil section panels shall be internally lined with fire retardant
      quality 25 mm thick, 24 Kgs./m3 density thermocole slab (with black
      pigmented neoprene coating).

      The insulation should be stuck to the body of AHU without making
      any hole in the body.

2.7  Ducts shall be insulated as follows:
     ----------------------------------------------------------------------------------------------
        Type                            Location                               Insulation
     ----------------------------------------------------------------------------------------------
  a) Supply duct                unconditioned space                 50 mm, 24 kg/m3 density
                                                                    TF quality, thermocole
                                                                    slab.
  b) Supply duct                conditioned space                   25 mm, 24 kg/m3 density
                                                                    TF quality, thermocole
                                                                    Slab.
  c) Return duct or             unconditioned space                 25 mm, 24 kg/m3 density
     plenum                                                         TF quality, thermocole
                                                                    slab.
     ====================================================
     Contractor shall submit the Insulation material test certificate clearly
     showing density, K value, lot ,etc of material.

2.8   Duct insulation shall be applied as follows:
      a)     Black bitumen paint shall be applied over the surface after
             cleaning the ducts.
      g)     24 kg/m3 density thermocole slab insulation of specified
             thickness shall be put by using Bitumen uniformly over
             Insulation surface.
      h)     The Thermocol Insulation shall be covered with 40 G AL foil. Al
             foil should be wrapped on Thermocole uniformly, using
             Bitumen.
      i)     The Joints of AL foil shall be overlapped at least 75mm covered
             with AL tape. Stripping should be done at distance of 1 meter to
             hold the insulation, wherever required.
      j)     Wherever necessary and particularly in larger duct, strapping
             with PVC material should be done after thermocol insulation
             and before putting AL foil

2.9   Acoustic Insulation of Duct:-
      The acoustic Insulation shall be done with 48 Kg/cu.m.Density,25mm
      thick Resin bonded Fibre Glass.



                          - 98 -             - 98 -            - 98 -
      The duct surface shall be cleaned and hot bitumen applied in patches
      and resin bonded glass wool cut to appropriate sizes and stuck to the
      duct wall. The insulated face shall be covered with RP tissue papers &
      perforated AL sheet of 28 Gage thickness having 3mm perforations at
      5mm staggered centre and held in position with rivets or galvanized
      steel bolt with counter sunk heads & 50 x 50 x 2 mm plate washers at
      not more than 600mm centers.

1.7   PIPING

1.0   SCOPE:
      The scope of this section comprises the supply & laying of all pipes
      required for this project. On the award of the contract, the tenderer
      shall prepare his own detailed working drawings.

2.0   CHILLED WATER PIPING:

2.1   All chilled water piping and fittings shall be of M.S. Class `C‟ (heavy
      class) of TATA/Jindal make only. The pipe confirming to BIS 1239 for
      pipe size upto 150 mm dia. and for pipe size 200 mm dia. and above
      shall be as per BIS 3589 having minimum 6 mm thickness. All joining
      in piping shall generally be by welding unless otherwise mentioned or
      as directed at site. All welding shall be done by qualified welders and
      shall strictly confirm to Indian Standard code of procedure for manual
      metallic welding of mild steel as per BIS 823.
2.2   The piping shall be so designed that the water velocity through the
      piping shall not exceeds maximum 8 fps and also the piping friction
      drop shall be limited to 4 m per hundred meter of pipe length.
      Pipe threads shall be of I.S. 554/1955 and flanges of I.S. 1536/1960..
      Pipes shall be sloping towards drain points.

2.3   Fittings shall be new and from standard manufacturers. Fittings shall
      be malleable casting of pressure ratings suitable for the piping system.
      Fittings used on welded piping shall be of the weldable type. Flanges
      shall be new and from standard manufacturers. Supply of flanges shall
      include bolts, washers etc. as required.

2.4   Tee-off connections shall be through reducing tees, wherever possible.
      Otherwise ferrules welded to the main pipe shall be used.

2.5   All equipment and valve connections or connections to any other
      mating pipes, shall be through unions/screwed flanges upto 50 mm
      dia. And flanges (welded or screwed for G.S.) for larger diameters or as
      required for the mating connection.

2.6   All welded piping is subject to the approval of the Engineer and
      sufficient number of flanges and unions shall be provided as required
      under.

2.7   All the drain piping shall be of G.I. „C‟ class of TATA/Jindal make with
      the Insulation as specified in the „Insulation‟
                     - 99 -          - 99 -       - 99 -
2.8   Gate valves shall be provided conforming to the following
      specifications.

      ----------------------------------------------------------------------------------------------
      Size                       Construction                                 Ends
      ----------------------------------------------------------------------------------------------
      12 to 65 mm                Gun metal                                    Screwed female

      65 mm & over          a) Body - Cast Iron                               Flanged
                            b) Spindle, valves seat,
                                              Bronze or
                               Wedge, nut etc. –
                                              Gun Metal
      ===================================================

      Valves shall conform to I.S. 780/1963 & flanges to I.S. 1536/1960 or as
      required. Valves shall have non rising spindles unless otherwise
      specified and shall be suitable for 300 psig test pressure. The valve
      shall be of Leader make. Tail pieces shall be used wherever required.

2.9   Butterfly valves shall perform the function of isolating valves.
      Butterfly valves shall have cast iron body with Nitrile rubber bonded
      bakelite hard back seat. Disc shall be of high duty iron with epoxy
      coating on nickel plating. All butterfly valves shall be provided with
      locking devices. The shaft shall be stainless steel AISI 410. The valve
      shall be Audco make only.

3.0   PIPING INSTALLATION:

3.1    Pipe runs and sizes should to meet the site conditions. The contractor
      on the award of the work shall prepare detailed working drawings,
      showing the cross section, longitudinal sections, details of fittings,
      locations of isolating, drain and air valves etc. They must keep in view
      the specific openings in buildings and other structures through which
      the pipes are designed to pass.

3.2   Piping shall be properly supported on or suspended from strands,
      clamps, hangers etc. as specified and as required. The tenderer shall
      adequately design all the brackets, saddles, clamps, hangers etc. and be
      responsible for their structural integrity.

3.3   Pipe supports shall be of steel, adjustable for height and prime coated
      with rust preventive paint and finish coated black. Where pipe and
      clamp are of dissimilar material, a gasket shall be provided in between.

      Spacing of pipe supports shall not exceed the following:
      Pipe (mm)                               Sapcing (Meters)
      3 to 12                                 1.22
      19 to 25                                1.83
      32 to 150                               2.44
      150 and above                           3.05
                        - 100 -               - 100 -            - 100 -
       Pipe hangers shall be fixed on walls and ceilings by means of metallic
       rawl plugs or approved shear fasteners.

3.4    Vertical risers shall be parallel to wall and column lines and shall be
       straight and plump. Risers passing from floor to floor shall be
       supported at each floor by clamps or collars attached to pipe and with
       a 12 mm thick rubber pad or any resilient material. Where pipes pass
       through the terrace floor, suitable flashing shall be provided to prevent
       water leakage. Risers shall also have a suitable elbow or concrete pipe
       support at the lowest point.

3.5    Pipe sleeves of 50 mm diameter shall be provided wherever pipes pass
       through walls and the annular space filled with felt and finished with
       retaining rings.

3.6    Insulated piping shall be supported in such a manner as not to put
       undue pressure on the insulation.

3.8    Cut-outs required in the floor slabs for taking the various pipes are
       provided. Tenderers shall carefully examine the cutouts provided and
       clearly point out wherever the cutouts do not meet with the
       requirements.

3.8    Piping work shall be carried out with minimum disturbance to the
       other work on the site. A program of work shall be chalked out in
       consultation with the Engineer.

3.9    All pipes using screwed fittings shall be accurately cut to the required
       sizes and threaded in accordance with I.S. 554/1955 and burrs
       removed before laying. Open ends of the piping shall be blocked as
       the pipe is installed to avoid entrance of foreign matter. Wherever
       reducers are to be made in horizontal runs, eccentric reducers shall be
       used if the piping is to drain freely; in other locations, concentric
       reducers may be used.

3.10   Drains shall be provided at all low points in the piping system and
       shall be of the following sizes:

             Mains                                            Drain

       Upto 300 mm                                            25 mm
       Over 300 mm                                            40 mm

       Drains shall be provided with gate valves of equal size with rising
       spindle. Drains shall be piped through equal size G.I. pipe to the
       nearest drain or floor waste. Piping shall be pitched towards drain
       points.




                     - 101 -         - 101 -        - 101 -
4.0   PRESSURE GAUGES:

4.1   The pressure gauges shall be Bourbon tube type confirming to IS : 3624
      and shall be with siphon cock and angle valve. Pressure gauges shall
      be not less than 150 mm dia. and of appropriate range etc. duly
      calibrated before installation. The Pressure gauges shall be of
      H.GURU/equ. make.
4.2   Care shall be taken to protect pressure gauges during pressure testing.

5.0   THERMOMETERS:

5.1   Thermometers shall be either 150 mm dia. dial or direct reading
      industrial type, of appropriate range, duly calibrated before
      installation. Thermometers shall be installed in separable wells.

6.0   INSULATION:

6.1   Pipes shall be insulated in accordance with specifications in section
      `INSULATION‟.

7.0   VIBRATION ELIMINATION:

7.1   Piping installation shall be carried out with vibration elimination
      fittings wherever required.

8.0   TESTING:

8.1   All piping shall be tested to hydrostatic test pressure of at least 1½
      times the maximum operating pressure, but not less that 7 Kgs/Sq.Cm.
      for a period of not less than 24 hours. All leaks and defects in joints
      revealed during the testing shall be rectified to the satisfaction of the
      Engineer.
8.2   Piping repaired subsequent to the above pressure test shall be retested
      in the same manner.
8.3   System may be tested in sections and such sections shall be securely
      capped.
8.4   The owner shall be notified well in advance by the Contractor of his
      intention to test a section or sections of piping and all testing shall be
      witnessed by the Engineer or his authorized representative.
8.5   The contractor shall provide all materials, tools, equipment,
      instruments, services and labour required to perform the test and to
      remove water resulting from cleaning and/after testing.
8.6   The contractor shall make sure that proper noiseless circulation of fluid
      is achieved through all coils and other heat exchanger in the system
      concerned. If proper circulation is not achieved due to air bound
      connections, the Contractor shall rectify the defective connections. He
      shall bear all the expenses for carrying out the above rectifications,
      including the tearing up and re-finishing of floors, walls, etc. as
      required.



                    - 102 -          - 102 -        - 102 -
8.6   No insulation shall be applied to piping until after the completion of
      the pressure testing to the satisfaction of the Engineer.

9.0   PAINTING:

9.1   After all the piping has been installed, tested and run for at least 10
      days of eight hours each, the piping shall be given two finish coats, as
      follows:
      ----------------------------------------------------------------------------------------------
      Service                             Flow                                Colour
      ----------------------------------------------------------------------------------------------
      Chilled water                       supply return              as approved by the
                                                                     Engineer
      ====================================================

9.2   The direction of flow of fluid in the pipe shall be visibly marked in
      White arrows.

1.8   ELECTRICAL EQUIPMENT

1.0   SCOPE:

1.3   The scope of this section comprises the supply & installation of all
      electrical equipment, such as, electrical motors

2.0   RATINGS & STANDARDS:

2.1   Rating of the motors shall be as indicated by you in the data sheets and
      as per the requirements of the airflow and static pressure. Ratings shall
      be on the basis of the specified ambient temperature and without
      exceeding the maximum temperature limits set by IS 325/1961.

2.2   Unless otherwise stated, Indian Standard Specifications shall apply.
      Where I.S. specifications are not available, the relevant British Standard
      Specifications shall be followed.

3.0   SQUIRREL CAGE INDUCTION MOTORS:

3.1   All motors shall be screen protected drip proof type TEFC with Class-C
      insulation, conforming to I.S. 325/1961 unless otherwise specified.

3.2   The motor shall be statically and dynamically balanced.

3.3   Bearings shall be combination ball and roller type with limit
      lubricators.

3.4   Termination shall be of ample size housed in a termination box . The
      terminal box shall be suitable for cable entry. Two earth terminals shall
      be provided.



                       - 103 -               - 103 -             - 103 -
3.5   The starting torque shall match with the load torque and the starting
      current shall not exceed 6 times the full load current.

4.0   INSTALLATION:

4.1   All motors shall be mounted on a common foundation with the driven
      equipment coupled through flexible couplings or through belt drive.
      Installation shall be in accordance with I.S. 900/1956.

4.2   Flexible connections shall be provided to all motors terminals
      wherever the motor is mounted on guide rails and belt drive is
      adopted. Even in the case of direct drive motors, the connections shall
      be flexible enough to prevent transmission of vibration.

4.3   All drive arrangements and couplings shall be provided with a safety
      guard.

5.0   TESTING:

5.1   Motors shall be tested in accordance with the relevant Indian Standard
      Specifications and test certificates furnished for routine type and high
      voltage tests.

6.0   PAINTING:

6.1   All motors, starters and the frame work shall be painted with two coats
      of a suitable paint of approved colour.




                   - 104 -          - 104 -        - 104 -
 Schedule of Technical Data for each Air Handling Unit
              (To be submitted for each AHU separately)


      Technical data shall be furnished as below:


VIII) General:
      14) Make:-
      15)   Air Discharge Direction:- Horizontal or Vertical
      16)   Overall Dimensions:-
      17)   Weight (including water):-
      18)   Type of Vibration Isolators:-
      19)   Approx. noise level (db):-
      20)   Drive belts & size (Flat, Belt, V-Belt):-
      21)   G.I. Casing Gauge:-
      22)   AHU body insulation material & thickness:-
      23)   Density of insulation material :-
      24)   Drain Tray Material :-
      25)   Drain tray insulating material & thickness:-
      26)   Whether inspection door provided for AHU body:-


IX)   Fan Section:
      9)   Air handling capacity (CFM/CMH):-
      10)   Total static press (mm WG):-
      11)   Fan speed (r.p.m.):-
      12)   Nos. of Fan outlet & area:-
      13)   Fan diameter:-
      14)   Balance (Static and/or Dynamic):-
      15)   Bearings:-
      16)   Make & Mode of Fan.




                  - 105 -          - 105 -       - 105 -
X)     Filter Section:
       8)     Type:-
       9)    Gross filter area:-
       10)   Velocity through filter (F.P.M.):-
       11)   Press drop through filter when new (mm, W.G.):-
       12)   Efficiency:-
       13)   Filter material:-
       14)   Filter Casing Material & Gauge

XI)    Cooling Coil:
       9)    Coil fin material & thickness:-
       10)   Copper tube diameter & thickness:-
       11)   Water through coil (F.P.M.):-
       12)   No. of fins per inch:-
       13)   Water press drop in the coil (psig):-
       14)   coil Face area :-
       15)   Nos. of coils:-
       16)   No. of rows of each coil:-

XII)   Drive Motor for AHU:
       6)    Make:-
       7)    Frame size:-
       8)    Insulation Class:-
       9)    HP/KW rating:-
       10)   Type


XIII) VALVES
1.     Butterfly Valve
       1]    Make :-
       2]    Model :-
2.     Gate Valve
       1]    Make :-
       2]    Model :-




                    - 106 -           - 106 -     - 106 -
XIV) Gauges

1.   Pressure Gauge

     1)    Make:-
     2)    Type:-

2.   Thermometers

     1)    Make:-
     2)    Type:-

VIII) Miscellaneous

1.   Insulation (Duct/Piping)
     1)    Make:-
     2)    Thickness & Density:-

2.   Piping
     1)    Make
     2)    Class of Pipe

3.   Ducting Sheet
     1)   Make of Sheet

4.   Anti Vibration Mounting
     1)    Type
     2)    Make

Note: Any other additional technical details may be included by the
     tenderer.




                 - 107 -       - 107 -      - 107 -
       ACCEPTABLE/APPROVED MAKE OF MATERIALS


      Material                             Make


1. Galvanized Plane Sheets                 Jindal/SAIL

2. Pipes                                   Tata/Jindal

3. Butterfly Valve/Ball Valve              AUDCO

4. Gate Valve                              Leader

5. Globe Valve                             Leader/AUDCO

6. „Y‟/Plot Strainer                       TrishuL/Emerald

7. Non Return Valve                        AUDCO/C&R

8. Gauges                                  H Guru/Star Scientific

9. Thermometers                            H Guru/Star Scientific

10. Pipe Insulation                        Beardsell/Lloyds/
                                           Phenotherm

11. Duty Insulation                        Owens Corning/Beardsell/
                                           U P Twiga

12. Electrical Motor                       Siemens/Crompton/ABB

13. Anti Vibration Maintenance             RMS Corporation/Dunlop




                       - 108 -   - 108 -       - 108 -
     TATA INSTITUTE OF FUNDAMENTAL RESEARCH
                 Technical Services


           TENDER DOCUMENT

   Replacement of very old Air Handling Units with
Supply, Installation, Testing & Commissioning of New
  Single Skin AHUs along with associated ducting,
insulation, piping, valves etc. at TIFR, Colaba, Mumbai




       - 109 -      - 109 -      - 109 -
                           CONDITIONS OF TENDER



9.    Quotations must be submitted in duplicate giving complete details; in
      particular, the offers should clearly specify applicable taxes, make, offered,
      warranty/guarantee terms, delivery period and delivery charges, if the price is
      ex-works/ex-Godown/ex-shop.

10.   Quotation should be valid for a period of 120 days from the date of
      opening of the tender.

11.   Tenders in sealed envelopes duly superscribed with the Tender No.
      and due date, shall be addressed to the Purchase Officer, Tata Institute
      of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai – 400
      005.

12.   Tenders will be opened in the presence of attending tenderers on the
      date and time specified in the enquiry; in the event the due date
      declared is a holiday, the tender will be opened on the following
      working day.

13.   This tender documents/form is not transferable.

14.   Tenders containing erasures or alterations will not be considered.

15.   Tenders which do not comply with the above conditions are liable to
      be rejected.

16.   The Institute will not defray any expenses whatsoever incurred by the Bidders
      for the preparation of bids.

9.    In case Bidder finds discrepancies or omissions from the specifications
      or other documents or has any doubt as to their meaning, he shall at
      once request in writing to the Purchase Officer, TIFR, who will for
      interpretation/clarification issue interpretation and clarifications as he
      may consider necessary in writing as an addendum. Copies of such
      addenda, if issued, shall be signed by the Bidder and shall form a part
      of his bid. Verbal clarifications given shall not be binding on the
      Institute.


10.   Before submitting the bids, the Bidders shall make themselves fully
      conversant with the technical specifications and other documents as
      attached so that no ambiguity arises at a later date in this respect.




                     - 110 -           - 110 -         - 110 -
11.   The owner reserves the right to postpone the date of submission and
      opening of bids.

12.   The bidders shall quote in English their rates/prices both in figures, as
      well as in words against each item of the work as detailed in the
      enclosed Schedule of Quantities. In the event of any discrepancy
      between the quoted rates/prices in words and that quoted in figures,
      the rates/prices quoted in words shall govern.

13.   The bidders must return the complete set of bid document. Each page
      of the bid document must be signed and dated by the bidder. Any bid
      not so signed and dated is likely to be rejected. All writing shall be in
      ink only. Any corrections in the entries in the Schedule of Quantities of
      this bid document, shall be initialed and dated by the bidder before
      submission of the bid. No parts of the bid document shall be altered,
      overwritten or amended by the Bidder

14.   The Institute shall be under no obligation to accept the lowest or any
      tender received in response to this tender notice and shall be entitled
      to reject any tender without assigning any reason whatsoever.




                   - 111 -          - 111 -        - 111 -
                   GENERAL CONDITIONS OF CONTRACT


15.0   Definition of Terms :

5.1.   In construing these general conditions and the specifications the
       following works shall have the meanings herein assigned to them
       unless there is something in the subject or context inconsistent with
       such works.

1.15   The term `Contractor‟/`Supplier‟/`Bidder‟/`Vender‟ shall mean the
       Tenderer whose tender has been accepted by the Owner and shall
       include the Tenderer‟s heirs, successors and assignees approved by the
       Purchaser:

1.16   The `Purchaser‟ shall mean Tata Institute of Fundamental Research,
       Homi Bhabha Road, Colaba, Mumbai – 400 005 and shall include the
       Purchaser‟s heirs, successors and assignees.

1.17   The term `Sub-Contractor‟ shall mean the firm or persons named in the
       contract for any part of the work or any person to whom any part of
       the work has been sublet with the consent in writing of the Engineer-
       In-Charge and shall include his heirs, successors and assignees
       approved by the Purchaser.

1.18   The Term `Inspector‟ shall mean any person appointed by/or on behalf
       of the Purchaser to inspect supplies, stores or work under the contract
       or any person deputed by the Inspector for the purpose.

1.19   The term `Particulars‟ shall mean, the following :

       f)    Specifications
       g)    Drawing
       h)    Sealed Pattern denoting a pattern sealed and signed by the
             Inspector.
       i)    Proprietary make denoting the produce of an individual firm.
       j)    Any other details governing the construction, manufacture
             and/or supply as existing for the contract.

1.20   The term `Engineer‟ shall mean Engineer, Central Services, Tata
       Institute of Fundamental Research, Colaba, Mumbai or some other
       person for the time being or from time to time duly appointed in
       writing by the Owner to act as Engineer for the purpose of the Contract
       or in default of such appointment the Purchaser.




                    - 112 -          - 112 -         - 112 -
1.21   The term `Specification‟ shall mean the specifications annexed to or
       issued with these Conditions of Contract.

1.22   The term `Site‟ shall mean the place or places at which the Equipment
       is to be delivered or work done by the Contractor shall include where
       applicable the lands and buildings upon or in which the works are to
       be executed and shall also include the place or places at which
       fabrication and other work is being carried out by the Contractor.

1.23   `Electrical Equipment‟, `Stores‟, `Work‟ or `Works‟ shall mean and
       include equipment and materials to be provided and work to be done
       by the Contractor under the Contract.

1.24   The `Contract‟ shall mean acceptance of the work order placed on
       contractor/supplier under section (2) of these conditions and shall
       include these conditions of Contract, Specifications, Schedule,
       Drawing, Letter of Intent of the Purchaser and any subsequent
       amendments mutually agreed upon.

1.25   `Tests on Completion‟ shall mean such tests are prescribed by the
       specifications or have been mutually agreed to between the
       Contractor/Supplier and the Purchaser to be made before the
       equipment is taken over by the Purchaser.

1.26   `Writing‟ shall include any manuscript, typewritten or printed
       statement under or over signature or seal as the case may be. Words
       importing `person‟ shall include firms, companies, corporations and
       association of individuals whether incorporate or not.

1.27   Words importing singular shall also include plural and vice versa
       where context requires.

16.0   Contract:

16.1   Contractor/Supplier should send their acceptance letter on receipt of
       `Letter of Intent‟ or work order within stipulated period. On expiry of
       said period or exorbitant delay in commencing or executing the work,
       the Purchaser shall not be liable to any claim from the Contractor/
       Supplier for work entrusted to and may revoke the contract.




                    - 113 -          - 113 -       - 113 -
17.0   Work at Site:

17.1   The contractor should ensure that his people follow safe practices at
       work.

17.2   Access to the works shall be allowed only to the Contractor/Supplier,
       Sub-Contractors or his duly appointed representatives.             The
       Contractor/ Supplier shall not object to the execution of work by other
       contractors or tradesman and shall afford them every facility for
       execution of their several works simultaneously with his own.

17.3   Work at the Purchaser‟s premises shall be carried out at such time as
       the Purchaser may approve but the Purchaser shall give the
       Contractor/ Supplier all reasonable facilities for the same. The
       Contractor/Supplier shall provide sufficient fencing, notice boards etc.
       to guard the works and warn the public.

17.4   The Contractor shall obey Central, local and State regulations and
       enactment pertaining to workmen and labour and the Engineer shall
       have the right to enquire into and decide all complaints on such
       matters.

18.0   Delays:

18.1   The Contractor shall not be entitled to any compensation for any loss
       suffered by him on account of delays in commencing or executing the
       work, whatever the cause for such delays may be, including delays in
       procuring Government controlled or other materials and delay in
       obtaining instructions and decisions from Engineer-In-Charge. The
       Contractor shall, however, merit extension of time as hereinafter
       mentioned.

5.0    Taking Over:
       The equipment when erected at site shall be deemed to have been
       taken over by the Purchaser when the Engineer will have certified in
       writing that the equipment has fulfilled the contract conditions.




                       - 114 -       - 114 -        - 114 -
8.0   Extension of Time:

8.1   If the Contractor is delayed in the progress of work by changes ordered
      in the work, or by any cause, which the Engineer shall decide to justify
      the delay, then the time of completion shall be extended by a
      reasonable time. No such extension shall be allowed unless requests
      for extension are made in writing by the Contractor/Supplier to the
      Engineer within 15 days from the date of occurrence of the delay.

9.0   Other Damages:

9.1   The Contractor/Supplier shall be responsible for all injury to persons,
      animals or things and for all damage to the works, structure of, and
      decorative work in the property which may arise from operation or
      neglect of himself or any of his Sub-Contractor or of his or Sub-
      Contractor‟s employees, whether such injury or damage may arise
      from carelessness, accident or any other cause whatever in any way
      connected with the carrying out of this contract. This clause shall be
      held to include any damage to buildings, whether immediately
      adjacent or otherwise, any damage to roads, streets, foot paths, as well
      as all damage caused to the works forming the subject of this contract
      by frost or other inclemency of weather. The Contractor/Supplier shall
      indemnify the Purchaser and hold him harmless in respect of all and
      any expenses or property as aforesaid and also in respect of any claim
      made in respect of injury or damage under any acts of Government or
      otherwise and also in respect of any award of compensation or
      damages consequent upon such claim.

9.2   The Contractor/Supplier shall reinstate all damage of every sort
      mentioned in this clause, so as to deliver up the whole of the contract
      works complete and perfect in every respect and so as to make good or
      otherwise satisfy all claims for damage to the property of third parties.

7.3   The Contractor/Supplier shall indemnify the Purchaser against all
      claims which may be made against the Purchaser, by any member of
      the public or other party, in respect of anything which may arise in
      respect of the works or in consequence thereof and shall, at his own
      expense, effect and maintain, until the work has been „taken over‟.




                   - 115 -          - 115 -        - 115 -
7.4   The Contractor/Supplier shall also indemnify the Purchaser against all
      claims which may be made upon the Purchaser whether under the
      Workmen‟s Compensation Act or any other statute in force during the
      currency of this contract or at common law in respect of any employee
      of the Contractor/Supplier or of any of his sub-contractor and shall at
      his own expense effect and maintain until the work has been `Taken
      Over‟, with an approved office.


7.6   The Purchaser, with the concurrence of the Engineer, shall be at liberty
      and is hereby empowered to deduct the amount of any damages
      compensation costs, charges and expenses arising or accruing from or
      in respect of any such claims or damages from any sums due to or
      become due to the Contractor/Supplier.




                   - 116 -          - 116 -        - 116 -
                 GENERAL INFORMATION TO BIDDERS


1.    On behalf of Tata Institute of Fundamental Research (hereinafter
      referred to as the Institute) bids are invited for design, supply,
      installation, testing & commissioning of Air- Conditioning system for
      INO Laboratory with associated ducting, Insulation, refrigerant piping,
      cabling etc at TIFR on Homi Bhabha Road, Navy Nagar, Colaba,
      Mumbai-400 005.

6.    The Air-conditioning system shall be installed in stand alone
      Laboratory building. The Laboratory building is situated near the
      Animal House. It is only a ground floor structure.

7.    It is important that the bidder must satisfy himself before quoting that
      the space provided is adequate for installation of his plant along with
      all equipments and accessories as no extra space can be provided. The
      tenderers must visit the site and take the actual measurement before
      quoting. The bidders shall furnish a fully dimensioned layout for his
      Package unit, with all equipment and accessories along with quotation.

8.    Bidder shall furnish the data called for in data sheets and the schedules
      in the standard Proforma to facilitate correct evaluation of his bid in a
      most expeditious manner. It is in the interest of the bidder to submit
      the bid in above manner with complete technical details, failing which
      it is likely that his bid may not be considered.

9.    Bidder shall be deemed to have carefully examined the specification in
      its complete form and to have fully informed and satisfied himself as to
      the details, nature, character and quantities of the work to be carried
      out, site conditions, and other pertinent matters and details.

6.     It is the intent of the owner/purchaser to incorporate these
       specification documents in the final contract order for the supply of
       material, equipment and services. Bidders are required to review
       these documents and clearly state in their proposals the acceptance of
       the same. Exceptions, if any shall be clearly stipulated in appropriate
       bidding schedule. The final contract between purchaser and vendor shall be
       subjected to such changes, if any, mutually agreed upon by purchaser and
       vendor and included in the main text of the contract/order.

7.    Bidder shall clearly specify all the deviations with respect to this
      specification in the appropriate schedule.


8.     SCHEDULE OF QUANTITIES TO BE FURNISHED BY VENDORS

8.1    All equipments mentioned in the enclosure should conform to the
       respective technical specifications. Only main items of the tender
       have been brought out specifically in this schedule, however all


                   - 117 -           - 117 -        - 117 -
         accessories as per specification or otherwise should be furnished at
         the time of quotation with cost of individual item.

8.2      Tenderers are required to fill in unit rates for all the items mentioned
         in the enclosure and any additional items quoted by them in the
         Financial Bid. In absence of the unit rates, the offer may be
         considered as invalid.

8.3     All the equipments supplied shall be as per the „List of Approved
        Make‟ attached .


9.       ITEMS TO BE FURNISHED BY THE PURCHASER:

9.1      Following shall be furnished by the purchaser:

9.1.1    Building, foundations and trenches.

9.1.2    Water and power for testing and commissioning.

10.      SERVICES SUPPLIED BY PURCHASER DURING ERECTION:

         The purchaser will provide for the contractor following services
         during the performance of work.

10.1     Temporary electric power at 415 V, 3 ph., 50 Hz at one point only
         which will be within 50 M of location of works free of cost. Water
         shall be provided free of cost for testing and commissioning.

10.2     The contractor shall make his own arrangement for supply, erection
         and dismantling on completion of works of his temporary
         distribution system, distribution panels and other equipments he
         may require to take the power from the purchaser's supply points.

10.3     The contractor's temporary distribution system shall be subjected in
         every respect to the approval of the purchaser and shall be arranged
         so as to avoid any interference with other operations on the site.

10.4     The purchaser will not hold himself responsible for the consequences
         of any interruptions to the continuity of the power supply or power
         system voltage and frequency fluctuations.

10.5     The electric power shall not be used for heating purposes.

10.6     Electrical power made available to the contractor, during testing and
         commissioning for the refrigeration unit is free of charge.

10.7     There is no EOT crane or mono rail to assist in erection work.
         Tenderer should provide suitable derricks & tripods for lifting heavy
         load.


                     - 118 -          - 118 -        - 118 -
11.    SERVICE SUPPORT, SPARES & TOOLS:

11.1   The bidder shall provide in detail the Service Support Set-up in
       Mumbai of the manufacturer or himself and lead time for
       replacement of faulty parts and for providing technical service.
       The entire system will be on comprehensive AMC with the
       supplier after the expiration of the guarantee period.

11.2   The tenderer shall furnish complete set of tools & wrenches for
       making adjustments, repairs & preventive maintenance including
       those required for erection.

12     COMPLETION DRAWINGS (FINAL DRGS) & MANUALS:

12.1   The contractor shall submit tracings in original with five prints of all
       installation drawings based on which equipments are installed &
       commissioned.

12.2   Contractor shall supply the following literature in four sets:
           a.      Start-up, operation and maintenance instructions of Air-
                   conditioning unit and its parts.
           b.      Installation instructions.
           c.      Field wiring diagrams.
           d.      Operation and Maintenance Manual of electrical parts
                   used in the same.

.




                   - 119 -          - 119 -        - 119 -
             INSTRUCTIONS TO BIDDERS & SPECIFIC
               NON-TECHNICAL REQUIREMENTS


1.   The details in respect of Earnest Money, Security Deposit

     a)    Earnest Money Deposit:
           Bidder must deposit Rs. 60,000/- towards EMD along with the
           tender failing which tender will be rejected. EMD will be
           accepted in the form of Bank Draft only favouring Registrar,
           TIFR, Mumbai.

     b)    Security Deposit:
           5% (i.e. five percent) of the gross value of the work will be
           deducted from the Contractor‟s bill towards Security Deposit.

     c)    Refund of Security Deposit:
           The Security Deposit (5%) will be refunded to the contractor
           after the expiry of defect liability period.

     d)    Defect Liability Period:
           12 (twelve) calendar months from the date of Institute‟s
           satisfactory completion certificate will be taken as defect liability
           period.

     e)    Bidders other than successful bidder will be refunded the EMD
           submitted by them within 12 months from the date of opening
           of the tender and no interest shall be paid against the said
           deposit.

     f)    In case the successful bidder fails to undertake the said work,
           his EMD amount will be forfeited.

     g)    The EMD paid shall be part of Security Deposit, i.e. 5% of the
           Contract value which will be refunded after expiry of Defects
           Liability period.

2.   No interest will be payable on the deductions towards Security
     Deposit/ Earnest Money.

3.   The Bidder shall submit the copy of their PAN card.




                  - 120 -          - 120 -         - 120 -
4.    Prices and rates quoted shall include cost of all materials, labour, plant,
      equipment, temporary work, tools, setting out, supervision, transport,
      taxes, royalties, octroi and any local tax or levy payable on all
      transactions, insurance and everything necessary for due performance
      of work under this contract.

5.    Prices and unit rates shall be valid even if the contract is split.

6.    Contract should be fixed rate contract. No escalation in prices of the
      materials during the currency of the contract is permitted. However
      any statutory variations like change in excise duty, taxes etc. if levied
      after award of the work shall be paid on production of proof of such
      changes. .

7.    a)     Site Visit:
             The bidders may like to visit the work site before submitting
             their bids to get conversant with site conditions, which may
             affect the work.

      b)     Location of Site:
             Tata Institute of Fundamental Research
             Navy Nagar, Colaba, Mumbai-400 005

8.    The work should be completed within 6 months from the date of issue
      of Purchase Order.

9.    Work shall commence at site within 2 months from the date of issue of
      letter of Purchase Order.

10.   The Contractor should plan and give his daily program for execution
      of work in advance so that no disturbance is created in the routine
      working of the Institute.

11.   Turnover Tax/Works Contract Tax:
      Turnover tax applicable to this contract shall be mentioned clearly and
      included by the bidder in his bid. No claim shall be entertained by the
      owner thereafter.
12.   Date of Taking Over:
      Site shall be deemed to have been taken over by owner when Engineer
      In-Charge certifies the completion of work in all respect as per tender
      conditions and specification.




                    - 121 -           - 121 -          - 121 -
13.   Income Tax as per the prevailing rates will be deducted from the
      progressive bills.
14.   The contractor shall not without the consent in writing of the Owner
      assign or sublet the contract.
15.   No labour below the age of 18 years shall be employed at site.
16.   Contractor shall be liable to pay workman compensation to his labour
      as per prevailing rules for any accident occurring at our site.
17.   The contractor shall pay wages to his workmen as per the Statutory
      Minimum Wages Act.
18.   The Contractor shall provide all risk insurance for his men, material
      and machines and absolve us of all risk and liabilities whatsoever
      pertaining to his men, material and machines.
19.   The Contractor will arrange for photo passes of his personnel and get
      the same endorsed by our Establishment/Security Department before
      beginning the work.
20.   The Contractor will ensure that his workmen follow safe practices at
      Work.
21.   The Contractor will work from 8.00 a.m. to 6.00 p.m.
22.   No labour camp etc. will be allowed to be put up inside or in the
      vicinity of the Institute.
23    Any dispute arising from this contract will be referred to two
      arbitrators one to be appointed by you and one by us. The two
      arbitrators, in the event of their disagreement will appoint an Umpire.
      The decision of the Umpire shall be final and binding. The arbitration
      will proceed as per Indian Arbitration Act, 1940, as amended up to
      date.
24.   The contractor should ensure that his engineer/supervisor is present
      at site throughout the progress of works till completion.
25.   Terms of Payment:
      Payment of pipe lines shall be made as per unit length i.e. per running
      mtr./feet.
25.1.2 Unless otherwise agreed to in writing between the Purchaser and the
       Contractor/Supplier, payment for the delivery of the equipment
       approved by the Inspector will be made as follows:
e)          70% of the Contract value against delivery, prorata of the value
            of goods delivered and after checking the same at site.
f)          15% on completion of erection.
g)          10% on commissioning and final inspection and testing at site.
h)          5% against PBG valid for 12 months from the date of handing
            over or after expiry of the Defect Liability period as stated in
            Clause 1d) page 11.




                   - 122 -          - 122 -        - 122 -
26.   The bidder should submit technical data sheet, drawings, any other
      technical detailed asked for in the tender with Part II i.e. Technical Bid
      of the Tender.
27.   The schedule of quantities and rates shall be read in conjunction with
      the specification, tender drawings, other tender documents, relevant IS
      Codes, Engineering hand books, etc. the Contractor shall not rely
      merely on the description given in the Schedule of Quantities.

28.   The quantities mentioned in “Bill of Quantities” are estimated
      quantities. However the payment shall be made as per actual quantities
      measured at site, after completion of work.

29.   Contractor will be fully responsible for lifting, shifting and handling
      Institute‟s properties such as any articles and materials lying nearby to
      proper place as instructed by Site In-Charge.

30.   All the materials used shall be used only after approval and tests of the
      Engineer-In-Charge as per specifications.
31.   All the debris shall be removed by the Contractor at his cost to any
      nearest BMC approved dumping yard.
32.   Storage and custody of material, till the time of handing over to TIFR,
      shall be the responsibility of contractor.
33.   The contractor after award of work, should submit detailed schedules
      showing program and order in which contractor proposes to carryout
      the work with dates and estimated completion time for various parts of
      work. This should be submitted in the form of Bar-chart.
34.   The Engineer can instruct the contractor to make any alteration,
      omission, or variation in work. The difference in cost due to instruction
      shall be added or deducted from contract price as the case may be in
      accordance with the rate applicable in the contract.
35.   DEVIATION FROM THE SPECIFICATIONS:
      The Contractor must tender for the equipment as herein specified
      but may submit alternate proposals for modifications to details where
      such modifications offer technical advantages and will make cost
      savings to the owner. The basis and details of calculations of
      operating cost and the net expected final saving shall be indicated
      wherever such a claim is made. The acceptances or otherwise of
      alternate proposal/deviations/ modifications etc. will be decided
      solely by the owner.

36.   Inspection of Material & Equipment:
      Supplier shall arrange for inspection/testing of AHUs at his works.
      TIFR will have liberty to inspect/test the parts of AHUs during the
      manufacturing/assembly. No charges will be paid extra towards
      inspection/testing. The bidder shall make necessary arrangements for
      travel, boarding & lodging for 3 engineers of TIFR deputed for
      inspection & testing of the AHUs at manufacturer‟s premises.
                    - 123 -         - 123 -       - 123 -
- 124 -   - 124 -   - 124 -
              BASIS OF DESIGN & SCOPE OF WORK

 1.1   Design Parameters for selection of air handling unit & its components
       shall be:

       Maximum face velocity across prefilter -         400 – 450 Ft./Min.
       Maximum face velocity across coils         -     450 – 500 Ft./Min.
       Maximum fan outlet velocity                -     1600 Ft./Min.
       Maximum fan speed                          -     800 RPM
       Maximum fan motor speed                    -     1500 RPM


1.4    Piping shall be sized for the following design parameter

       Maximum flow velocity                      -     8 Ft./Sec.
                                                        = 2.5 Mtrs./Sec.
       Maximum friction                           -     5 Ft. per 100 Ft. run

1.3    Design parameters for duct design shall be

       Max. flow velocity [S.A. Duct]             -     1200 Ft./min.
                                                        = 365 Mtr./min.

       Max. flow velocity [R.A. Duct]             -     800 Ft./min.
                                                        = 240 Mtrs./min.

       Max. friction drop                         -     0.1” WG/100 Ft. run
                                                        = 1 cm WG/100 M run

       Max. velocity at supply air diffusers      -     500 Ft./Min.
                                                        = 150-200 Mt./Min.

2.0    The proposed new AHUs will be put after replacing the old AHUs,
       which are in running position. The contractor shall have to carry out
       the work in short span of time (during shut down), preferably during
       weekends including Sunday. The contractors need to work day and
       night to ensure minimum disturbance to users.
3.0    The contractor should inspect the site before quoting and ascertain for
       himself the nature, character and extent of work to be executed and
       should include all items and services necessary, whether specially
       mentioned or not in the specifications, scope etc. to meet with the
       intent and purpose of these specification.




                     - 125 -            - 125 -       - 125 -
4.0    After award of work contractor should submit the GA drawing as well
       as data sheet of AHU, parts etc. for engineer‟s approval. He shall start
       the manufacturing only after the approval.
19.0   All AHUs with the motor above 5 HP should use the flat type belt for
       transmission of power (“Habasit-Iakoka” make flat belt only). Below 5
       HP motor, a regular V-type belt of Fenner make should be provided.
20.0   The static pressure & air flow rate mentioned in the tender are
       maximum for the purpose of designing the components. However it is
       contractor‟s responsibility to prove the airflow rate at the time of
       commissioning. He can use V belt pulley at initial stage and later on
       replace with flat belt once system stabilizes.
21.0   During the replacement of AHU contractor shall cut/modify the
       existing header/coil connection as per the new requirement. The new
       piping shall be paid on RMT basis as per the tender rate. Similarly
       ducting connection includes cutting/modifying the existing ducting
       including making new plenum, if necessary. The new ducting shall be
       paid on Sqft basis as per tender rate.
22.0   The manufacturer of AHU should have the single space for assembly &
       testing of AHU preferably at his work, where different section of AHU
       like casing, coil etc. manufactured.
23.0   Supplier shall arrange for inspection/testing of AHU at his works.
       TIFR will have liberty to inspect/test the parts of AHU during the
       manufacturing/assembly of AHU. No charges will be paid extra
       towards inspection/testing. The bidder shall make necessary
       arrangements for travel, boarding & lodging for 3 engineers of TIFR
       deputed for inspection & testing of the AHUs at manufacturer‟s
       premises.
24.0   Ceiling suspended type AHU should have intermediate anti vibration
       device to stop transmission of vibration to ceiling.
25.0   There are various sizes of insulated piping in the institute on which the
       layers of sand cement plaster required. Bidder should quote his rate of
       sand cement plaster of various sizes as per item no. 16 of BOQ.
26.0   Spare Motor with pulley shall be provided on extended shaft for Two
       AHUs (23500 CFM & 9000 CFM Catering to Pelletron Building)
27.0   Power supply shall be given by TIFR at AHU motor as per requirement
       but the termination at motor end (With Copper Lugs) shall be in the
       scope of contractor.
28.0   Out of eight AHUs, 4 AHUs of Pelletron block, one AHU for `C‟ Block
       Mezzanine & one AHU (ceiling suspended) of Pent House are to be
       replaced on one to one basis, whereas the remaining two AHUs
       capacity have been changed. It is the responsibility of successful bidder
       to prove the capacity of each AHU. Mere quoting on the basis of
       tender will not absolve the successful bidder from proving the capacity
       of AHUs.




                    - 126 -          - 126 -        - 126 -
15.0   All welding must conform to the requirements of applicable IS
       standards. All welding procedures and details shall be subject to the
       approval of Engineer In-Charge. All necessary arrangements for
       working at heights above the floor level like scaffolding, rope etc. shall
       be arranged by the Contractor. All materials, equipments, tools &
       tackle, shifting and lifting arrangement and other necessary items
       required to carry out the work shall be arranged by the Contractor. All
       other necessary equipments, arrangements like welding machine, gas
       cutter, welding rods, drill bits, drilling machine, grinder, gas cylinders
       for gas cutting etc. shall be arranged by the Contractor. Electricity &
       water needed for carrying out the work shall be provided free of cost
       by TIFR.

16.0   The Contractor shall make arrangements to store his tools, equipments
       etc. in his own tool box having proper locking arrangements. Material
       required for carrying out the work such as flanges, nuts and bolts,
       rubber gasket, pipes etc. shall be provided by the Contractor. All the
       above material shall be of high standards and subjected to the approval
       of the Engineer In-Charge.

17.0   The work shall be carried out with least disturbance to the users.
       The shut down if any required for carrying out the works shall be
       minimum and advance intimation to be given. Shut down periods
       will be intimated for the work to be taken up after obtaining the
       necessary approval form the Users.

18.0   The Contractor shall inspect the site and ascertain for himself the
       nature and extent of work to be executed and shall include all the
       items and services necessary whether specifically mentioned or not
       in the tender specification, drawing, so as to meet the intent and
       purpose of this specification.




                     - 127 -          - 127 -        - 127 -
                     TECHNICAL SPECIFICATIONS

1.    SCOPE :
      The scope of this section comprises the supply, installation, testing and
      commissioning of single skin air handling units of the size and capacity
      set forth in the Schedule of Equipment.

3.0   CABINET TYPE:
2.1   The unit shall be of sectionalized construction consisting of Fan section,
      coil section, Filter section and drain pan.

2.2   Metallic casing shall be fabricated from 16 Gauge galvanized sheet
      steel ribbed and reinforced for structural strength and rigidity. 16
      Gauge hot section channels shall be used for reinforcing .It shall be
      sectionalized construction with proper sealing at the joints to make the
      joints air tight. Fan section and panels with bearing supports shall be
      reinforced with heavy gauge channels. For AHUs supported on floor,
      leg packages shall be provided for attachment to the Fan and Filter
      sections, raising the height by 350mm. All edges shall be formed inter
      locking to stiffen and support the weight and shall be secured with
      galvanized nuts and bolts.

2.3   Fan impeller shall be of forward curved blade centrifugal type.
      Impeller shall be of double width double inlet type. Two or three
      wheels shall be provided for each AHU. Blower section (includes
      Scroll, impeller blades, etc.) shall be fabricated from 16 gauge
      galvanized sheet steel. Fan housing shall be made of die formed side
      sheets with stream lined inlet and guide vanes to ensure smooth air
      flow into the fans. Fan shaft shall be of solid cold rolled carbon steel,
      ground and polished. The whole assembly shall be statically and
      dynamically balanced for smooth operation.
      Fan shaft bearing shall be of heavy-duty type selected for an average
      operating life of 100,000 hours. Bearing shall be self-aligning type. They
      shall be permanently lubricated. Bearing housing shall be fabricated
      from malleable iron and suitably supported from outside.

       Fan motor shall be mounted on an adjustable sound isolating base
      located on the top surface above the AHU.

2.4   Cooling Coils shall be of the fin and tube having Aluminum fins firmly
      bonded to Copper tube (Seamless solid drain). Capacity of the coil
      shall be as required under the Schedule of Equipment. Velocity of air
      across coil face shall not exceed 500 CFM. Tube shall be of 5/8” O.D.
      and with 10-12 fins per inch. Coils shall be tested at 300 psig Nitrogen
      pressure in presence of our engineers. Shut off valve (Butterfly type)
      at the inlet and outlet of coil to be provided. Proper purging and drain
      arrangement to be made on header of coil. Copper tube gauge



                    - 128 -          - 128 -        - 128 -
       thickness shall not be less than 20 SWG. Aluminum fins gauge shall
       not be less than 32 G. Fin punching profile must follow full length air
       of contact with tube and must be turned at edges to increase rigidity
       and contact.

       Drain pan shall be constructed of 18 G stainless steel with sandwich
       type insulation in-between bottom plates. Necessary support shall be
       provided to slide the coil in the drain pan. Outlet shall be provided on
       both the side of drain pan. An extension drip pan shall be provided at
       proper location outside the casing to catch all drip from external coil
       connections and valves.
       End panel of the coil section casing shall be removable for withdraw of
       the coil and shall be provided with opening for coil connections.

2.5    Filters shall be cleanable viscous metal AL box type and shall be 50 mm
       thick. The filter shall be hold with stiffeners in-between made out of
       hollow SS material.

2.6    Suitable, easily openable service door (for Internal Maintenance)
       between coil section and fan section to be provided to enable a
       person to enter inside

2.7    Unit shall be thermally and sound insulated as in section “Insulation”

2.8    Spring type Anti Vibration Mounting of approved make shall be
       provided as vibration isolators.

2.9    Sheet metal fresh air louvers with frame, damper, etc. shall be
       provided in the clear opening in masonry made by the owner.

2.10   The Unit cost shall be complete with all accessories, including the
       following:
       1] Manual air vents at high point and drain at low point. 2] Water
       Thermometers at Inlet & Outlet.3] Pressure gauges with siphon cocks
       at Inlet & Outlet. 4) Canvass Connection

3.     PERFORMANCE DATA & TESTING:
       Air handling units shall be selected for the lowest operating noise level
       of the equipment for performance rating and power consumption data
       with operating points(On Fan Curve) clearly indicated shall be
       submitted with the tenders and verified at the time of testing and
       commissioning . The following test result shall be furnished during
       commissioning in the presence of department‟s Engineer;

       a) Air Side
            Air Flow Rate in CFM or Cub.M per hour
            Static pressure in mm wg
            Entering Dry bulb & Wet bulb temperature
            Leaving Dry bulb & Wet bulb temperature


                    - 129 -          - 129 -        - 129 -
     b) Water Side
         Inlet temperature in degree C
         Outlet temperature in degree C
         Pressure drop in psig

7.   PAINTING:
     Unit shall be painted with approved type of Epoxy paint (minimum
     two coats)

8.   CODES & STANDARDS FOR AIR HANDLING UNIT:
     The design, manufacture and performance of AHU shall comply all
     currently applicable statutes, regulations and safety codes in the
     locality where the equipment will be installed. The equipment shall
     also conform to the requirements of the latest editions of applicable
     Indian/U.S.A. standards. Nothing in this specification shall be
     construed to relieve the vendor of this responsibility. In particular the
     equipment shall conform to the latest editions of the following
     standards:

a)   ANSI 89.1    Safety code for mechanical refrigeration.
b)   IS:659       Safety code for air-conditioning.
c)   IS:660       Safety code for mechanical refrigeration.
d)   AHRAE        Standard-33 methods of testing for rating forced
                  Circulation air-cooling and air heating coils.
e)   ARI-410      Standard for forced circulation air cooling and air
                  Heating coils.

     G.I. insulated condensate drain piping with drain valve, upto sump or
     floor drain within the air handling unit room. The drain shall be
     provided with proper „U‟ loop. Only piping and valve shall be
     measured and paid at unit rate.

9.   PERFORMANCE DATA:
     Air handling units shall be selected for the lowest operating noise level
     of the equipment. Fan performance rating and power consumption
     data with operating points clearly indicated shall be submitted with
     the tenders and verified at the time of testing and commissioning of
     AHU.




                  - 130 -          - 130 -        - 130 -
      SHEET METAL WORK
1.0   SCOPE:

1.1   The scope of this section comprises the supply and installation of all
      sheet metal ducts.

1.2   MATERIAL:

1.2.1 Ducts shall be made of galvanized steel sheets. The galvanized steel
      sheets shall conform to IS 277-1965 with 200gsm Zink coating.

1.2.4 The thickness of sheets shall be as given below:

Dimensions     Gauge       Gauge      Type of Joints       Type of Bracings
of ducts        G.I.        Al

Upto 600        24             22    G.I. Flange at       Cross bracings.
                                     2.5 centre

601 to 750      24             22    25 x 25 x 3 mm   25 x 25 x 3 mm MS
                                     Angle iron frame angles bracing at 1500
                                     With 6 mm dia. mm from joints
                                     Nuts & bolts

751 to 1000     22             20    25 x 25 x 3 mm   25 x 25 x 3 mm MS
                                     Angle iron frame angles bracing at 1500
                                     With 6 mm dia. mm from joints
                                     Nuts & bolts

1001 to 1500    22             20    40 x 40 x 5 mm   40 x 40 x 3 mm MS
                                     Angle iron frame angles bracing at 1500
                                     With 8 mm dia. mm from joints
                                     Nuts & bolts

1501 to 2250    20             16    50 x 50 x 3 mm       40 x 40 x 3 mm MS
                                     Angle iron to be     angle bracing at
                                     Cross braced         1200 mm from joints
                                     diagonally with      or 40 x 40 x 3 mm MS
                                      10 mm dia. nuts     angle diagonal bracing
                                     and bolts at 125
                                     centre.

2250 & above    18             14    50 x 50 x 6 mm       50 x 50 x 3 mm MS
                                     Angle iron 10        angle bracing at
                                     mm dia. nuts         1200 mm from joints
                                     and bolts at 125     or 50 x 50 x 3 mm MS
                                     centre.              angle diagonal bracing


                     - 131 -         - 131 -          - 131 -
HANGERS FOR DUCT:

Duct Size      Spacing            Size of MS equal angle      Size of rod dia
 [mm]           [M]                   [mm x mm]                    [mm]

Upto 750         2.5                     40 x 3                      10

751 to 1500      2.0                     40 x 3                      12

1501 to 2250     2.0                     50 x 3                      15

2251 to above    2.0                     50 x 3                      15

      All the MS angle, use for duct support & brazing etc, shall be hot dip
      galvanized

1.5   DAMPERS:

1.3.1 All dampers shall be louver dampers of robust construction & tightly
      fitted. The design, method of handling and control, shall be suitable
      for the location and service required.

1.3.4 Dampers shall be provided with suitable links, louvers and quadrants
      as required for their proper operation, control or setting in any desired
      position. Dampers & their operating devices shall be made robust,
      easily operable and accessible through suitable access doors in the
      ducts. Every damper shall have an indicating device clearly showing
      the damper position at all times.

1.3.3 Dampers shall be placed in ducts & on main supply or return air duct
      for the proper volume control and balancing the system.

1.4   GRILLS & DIFFUSERS:

1.4.1 All side wall supply air grills shall be similar and equal to Tuttle and
      Bailey Triflox T 647 double deflection register with approved damper.
      Supply air grills shall be provided with vertical and horizontal
      adjustable bars and volume control multi-louver damper that shall be
      key operated from the front of the grills.

1.4.2 All return air grilles shall be similar & equal to Tuttle & Bailey
      Aerovane 770D grills.




                       - 132 -       - 132 -        - 132 -
1.5   INSTALLATIONS:

1.5.1 The duct fabrication & installation shall generally conform to I.S. 655-
      1963.

1.5.2 The contractor shall provide and neatly erect all sheet metal work or as
      may be required to carry out the intent of these specifications and this
      shall meet with the approval of the Engineer in all its parts and details.

1.5.3 All necessary allowances and provisions shall be made by the
      contractor for beams, pipes or other obstructions in the building.
      Where necessary to avoid beams or other structural work or plumbing
      or other pipes or conduits the ducts shall be transformed, divided or
      curved to one side, as approved or directed by the Engineer.

1.5.4 All metal work in dead or furred down spaces shall be erected in time
      to cause no delay to other contractors in the building.

1.5.5 Ducting over furred ceiling shall be supported from the slab above, or
      from beams. In no case shall a duct be supported from the ceiling
      hangers or be permitted to rest on a hung ceiling.

1.5.6 If a duct cannot be run as decided, the Contractor shall install the duct
      between the required point by any path available, subject to the
      approval of the Engineer.

1.5.7 All ducts shall be rigid and shall be adequately supported and braced
      where required with standing beams, tees or angles of ample size to
      keep the ducts true to shape and to prevent buckling, vibration or
      breathing.

1.5.8 All joints shall be made tight and all interior surfaces shall be smooth.
      Bends shall be made with radius not less than ½ the width of the duct
      or with scientifically designed interior curved vanes, as approved. The
      vanes shall be so spaced that the aspect ratio of each of the individual
      elbow formed by the vanes will be about five.

1.5.9 All sheet metal connections, partitions & plenums required to confine
      the flow of air to and through the filters and fans, shall be constructed
      of 18 G galvanized Iron, thoroughly stiffened with 1” x 1” angle Iron
      braces and fitted with all necessary doors as required by the Engineer,
      to give access to all parts of the apparatus. Doors shall be not less than
      18” x 20” in size.

1.5.10 Where metal ducts or sleeves terminate in wood work, brick or
       masonry openings, tight joints shall be made by means of closely fitted
       heavy flanged collars.

                    - 133 -          - 133 -        - 133 -
1.5.11 Air handling units shall be connected to duct work by inserting at air
       inlet and air outlet a double canvas sleeve. Each sleeve shall be
       minimum 4” long securely bonded and bolted to duct and units. Each
       sleeve shall be made smooth and the connecting duct work rigidly held
       in line with unit inlet or outlet.

1.6    INSULATION:

1.0    SCOPE:

1.1    The scope of this section comprises the supply and application of
       insulation as herein specified.

2.0    COLD INSULATION:

2.1    All pipes, ducts & equipments operating at temperature lower than the
       ambient shall be insulated in the manner specified hereinafter.

2.2    The insulating material shall be as follows:

       k)     Pipes:
              Rigid preformed sections of expanded polystyrene of uniform
              density of 24 Kgs./m3 with a `K‟ value of not more than 0.23
              B.T.U/ Hr./In/Sq.ft./0F at 500F mean temperature.

2.5    No insulation shall be applied on pipes until the pipes are satisfactorily
       tested.

       Thickness of pipe insulation shall be 50mm.

2.6    Pipe insulation shall be applied as follows:
  a)   Pipes shall be thoroughly cleaned with wire brush and rendered free
       from all rust and grease.

  b)   Two coats of bitumen shall be applied on the cleaned pipe surface.

  c)   Rigid pipe sections of insulation shall be fixed tightly to the surface
       taking care to seal all joints and covered with Polythene sheet.

  d)   24 G x 20 mm mesh wire netting shall be applied, butting all joints and
       shall be laced down with G.I. wire.

  g)   Insulated surface shall be finished with two layers of sand cement
       plaster. Each layer shall be not less than 7 mm thick.



                     - 134 -          - 134 -         - 134 -
2.5   All valves, fittings, strainers etc. in chilled water piping shall be
      insulated to the same thickness as specified for the main run of piping.
      Valve bonnets, yokes and spindles shall be insulated in such a manner
      as not to cause damage to insulation when the valve is used or
      serviced.

2.6   Cabinet air handling units shall be insulated as follows.
      Fans & coil section panels shall be internally lined with fire retardant
      quality 25 mm thick, 24 Kgs./m3 density thermocole slab (with black
      pigmented neoprene coating).

      The insulation should be stuck to the body of AHU without making
      any hole in the body.

2.7   Ducts shall be insulated as follows:
      ----------------------------------------------------------------------------------------------
         Type                            Location                               Insulation
      ------------------------------------------




2.9




      l)



      m)




                        - 135 -               - 135 -            - 135 -
n)




o)




     - 136 -   - 136 -   - 136 -
- 137 -   - 137 -   - 137 -
- 138 -   - 138 -   - 138 -
3.9




      - 139 -   - 139 -   - 139 -
- 140 -   - 140 -   - 140 -
- 141 -   - 141 -   - 141 -
1.5




      - 142 -   - 142 -   - 142 -
- 143 -   - 143 -   - 143 -
XV)
      27)
      28)


      29)
      30)
      31)
      32)
      33)


      34)
      35)


      36)
      37)
            - 144 -   - 144 -   - 144 -
         38)


         39)




XVI)
         17)
         18)
         19)
         20)
         21)
         22)
         23)
         24)




XVII)
         15)
         16)
         17)
         18)


         19)
         20)
         21)

XVIII)
         17)
         18)
         19)
         20)
         21)
         22)

               - 145 -   - 145 -   - 145 -
       23)
       24)

XIX)
       11)
       12)
       13)
       14)
       15)


XX)




XXI)




             - 146 -   - 146 -   - 146 -
- 147 -   - 147 -   - 147 -
- 148 -   - 148 -   - 148 -
17.




18.



19.




20.




21.


22.


23.


24.




      - 149 -   - 149 -   - 149 -
- 150 -   - 150 -   - 150 -
29.0

9.1.




1.28




1.29




1.30




1.31




1.32


       k)
       l)
       m)

       n)



            - 151 -   - 151 -   - 151 -
       o)



1.33




1.34




1.35




1.36




1.37




1.38




            - 152 -   - 152 -   - 152 -
1.39




1.40



30.0

30.1




31.0

31.1



31.2




31.3




       - 153 -   - 153 -   - 153 -
31.4




32.0

32.1




10.0

10.1




11.0

11.1



       - 154 -   - 154 -   - 154 -
11.2




       - 155 -   - 155 -   - 155 -
7.7




10.




11.




12.




      - 156 -   - 156 -   - 156 -
13.




      - 157 -   - 157 -   - 157 -
- 158 -   - 158 -   - 158 -
- 159 -   - 159 -   - 159 -
- 160 -   - 160 -   - 160 -
- 161 -   - 161 -   - 161 -
- 162 -   - 162 -   - 162 -
25.1.3




i)



j)
k)

l)




         - 163 -   - 163 -   - 163 -
- 164 -   - 164 -   - 164 -
1.6




      - 165 -   - 165 -   - 165 -
33.0




34.0




35.0




       - 166 -   - 166 -   - 166 -
36.0




37.0




38.0



39.0




40.0



41.0




42.0




       - 167 -   - 167 -   - 167 -
- 168 -   - 168 -   - 168 -
4.0




      - 169 -   - 169 -   - 169 -
- 170 -   - 170 -   - 170 -
      

      
      

      




      
      
      

10.



11.



          - 171 -   - 171 -   - 171 -
12.




      - 172 -   - 172 -   - 172 -
1.2.5




        - 173 -   - 173 -   - 173 -
1.6




1.3.5




        - 174 -   - 174 -   - 174 -
- 175 -   - 175 -   - 175 -
- 176 -   - 176 -   - 176 -
      p)




2.6




2.7




           - 177 -   - 177 -   - 177 -
h)




     - 178 -   - 178 -   - 178 -
2.10




       q)



       r)



       s)




       t)




            - 179 -   - 179 -   - 179 -
- 180 -   - 180 -   - 180 -
- 181 -   - 181 -   - 181 -
- 182 -   - 182 -   - 182 -
3.10




       - 183 -   - 183 -   - 183 -
- 184 -   - 184 -   - 184 -
1.7




      - 185 -   - 185 -   - 185 -
- 186 -   - 186 -   - 186 -
XXII)
        40)
        41)


        42)

              - 187 -   - 187 -   - 187 -
         43)
         44)
         45)
         46)


         47)
         48)


         49)
         50)
         51)


         52)




XXIII)
         25)
         26)
         27)
         28)
         29)
         30)
         31)
         32)




XXIV)
         22)
         23)
         24)
         25)



               - 188 -   - 188 -   - 188 -
        26)
        27)
        28)

XXV)
        25)
        26)
        27)
        28)
        29)
        30)
        31)
        32)

XXVI)
        16)
        17)
        18)
        19)
        20)


XXVII)




XXVIII)




              - 189 -   - 189 -   - 189 -
- 190 -   - 190 -   - 190 -
- 191 -   - 191 -   - 191 -

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:169
posted:7/27/2011
language:English
pages:192