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Xenia City School District
Commissioning Design Review Comments
School Name: McKinley Elementary
Project No.: 10-1632.02
Date Issued: January 7, 2011
Issued By: Philip J. Becker, PE, LEED AP, Commissioning Authority, firstname.lastname@example.org
Distribution: Jeff Lewis, Xenia Community Schools; James Froehlich, Scaparotti Construction Group; Keith Krzeminski, Been Kuo, OSFC
As part of the project team, we are making these comments in an effort to improve the overall quality of the project. The specific intent of these comments is to raise questions about
issues such as operation, maintainability, and safety that may impact the short or long term operation of the facility or the ability of the design to function properly. Please have the
appropriate member of the design team review and comment on the following items. We are available to discuss any questions you may have. Note: New comments are in BOLD
Item Comment Response Status
BUILDING ENVELOPE GENERAL (BG)
BG1 Review comments are based on the requirements of the Ohio School Design Manual. No Response Needed N/A
BG2 The Ohio School Design Manual recommends testing of the building envelope by pressurization (no No Response Needed N/A
more than .04 cfm/sf loss through the envelope at a pressure of 1.57 psf). Comments on the
building air barrier are aimed at achieving this level of performance.
BG3 Air barrier systems for a building enclosure are materials interconnected to form assemblies (such No Response Needed N/A
as walls, roofs, windows, etc.) with flexible joints that can accommodate expected relative
movement of the assemblies. Where called for, air barriers should be installed to resist both wind
and interior fan pressures as well as movement of the structure. We recommend that these
materials and joints to be identified in the specifications and on the drawings.
BG4 Comments that reference a specific drawing are general in nature. They are intended to be applied No Response Needed N/A
to similar details, assemblies, and conditions.
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Item Comment Response Status
BUILDING ENVELOPE (B)
B1 SD: This building may require an air barrier to pass an air pressurization test as recommended by DD: Testing is specified in Division 01 Closed
the Ohio School Design Manual. We recommend that the architect of record provide test Specification Section 014100 - Air Barrier
requirements to the project specifications as follows: Air leak test shall be performed and not exceed Quality Control
.04 cfm/sf at 1.57 psf. We recommend the air barrier to be identified on details with a specific
lintetype consistently throughout details. DD: Spec section 072723 (1.6)(F) identifies testing on
mock-up panel. Please confirm if testing will be performed on main building. CD: Comment
B2 SD: The Ohio School Facilities Commission "Guidelines for Commissioning" in the construction DD: Testing is specified in Division 01 Closed
phase recommends thermal imaging testing as a part of envelope commissioning . We recommend Specification Section 014100 - Air Barrier
the architect of record consider adding test requirements to project specifications to include thermal Quality Control
imaging of all parts of the building envelope. DD: Please confirm if the Owner will incorporate this
test. CD: Comment closed.
B3 SD: We recommend providing a large scale detail to include the foundation and footing. DD: Detail --- Closed
D/A5.A provided, comment closed.
B4 SD: We recommend providing cavity drainage material to base of wall cavities consistently --- Closed
throughout drawings. DD: Comment closed.
B5 SD: We recommend all exterior jamb details allow insulation to extend fully to jamb blocking. --- Closed
Consider providing large scale details. DD: Details provided on sheets A6.2 thru A6.5, comment
B6 SD: We recommend an air barrier to extend fully to door and window jambs and be sealed to the --- Closed
frame. This may require a transition strip to overlap at openings. Consider providing large scale
details. DD: Details provided on sheets A6.2 thru A6.5, comment closed.
B7 SD: We recommend that an air barrier overlap the wall system at the window head & sills and be --- Closed
sealed to the windows. This may require a transition strip to overlap at openings. Consider
providing large scale details. DD: Details provided on sheet A6.4, comment closed.
B8 SD: We recommend a continuous transition of air barriers from wall to roof. Various roof overhangs --- Closed
& parapets do not show a continuous air barrier. DD: Comment closed.
B9 SD: We recommend that vertical air barriers (walls) and roof membranes that form air barriers --- Closed
overlap between 12" and 24" to maintain integrity of air barrier. DD: Comment closed.
B10 SD: Section 2603.4 of the Ohio Building Code requires a thermal barrier between the foam plastic --- Closed
insulation and the metal deck of the roof assembly. We recommend the architect of record review
this section for compliance. DD: Comment does not apply to polyisocyanurate, comment closed.
B11 SD: We recommend the architect of record to review compliance for combustible roof materials. i.e. DD: Specifications for fire-retardant treated Closed
plywood that may need to be fire retardant. DD: Comment still applies. CD: Comment closed. plywood will be added to Specification Section
B12 SD: We recommend lapping roof membrane completely over top of roof curbs and providing an --- Closed
airtight seal to maintain integrity of air barrier. Confirm if curbs or equipment will be placed on top of
roof. DD: Comment closed.
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Item Comment Response Status
B13 SD: We recommend providing air and thermal barriers for roof penetrations where voids occur for --- Closed
details including drainage, curbs, plumbing, mechanical, hatches, etc. to communicate barrier
transitions. Consider providing large scale details for these items. DD: Comment closed.
B14 SD: We recommend that a wall mock-up be constructed to verify the construction methods & --- Closed
materials and assure that wall performance will be satisfactory. We recommend the mock-up
include more components found in walls and exhibit how the air barrier in the wall transitions to the
roof. A mock-up based on these recommendations will be larger than a typical masonry mock-up.
We also recommend that the mock-up be detailed on the drawings. The mock-up should include the
following building components: DD: Spec section 042000 (1.7)(G) provides adequate mock-up,
Exterior wall materials
Wall flashings & weeps
Cell vents (top of wall)
Typical parapet/eave detail
Ventilated attic/soffit spaces
Transitions from wall to roof/roof to wall (flashing & insulation details)
Typical wall penetrations
Typical roof penetrations
Roof & attic vents
B15 SD: We recommend providing details for sun shade devices or canopies to ensure any penetrations DD: Sunshades are being considered for Closed
through the wall cavity and air and thermal barriers are sealed properly. DD: Detail sheet A6.7, we deletion as a Value Engineering item. If
recommend to provide additional spray-foam insulation after areas are cut out for mounting. CD: they remain in the project, a note will be
Note added, comment closed. been added to cover this in the Construction
Documents (CD) Phase.
B16 SD: Care should be taken to ensure the curtain wall system is sealed to provide a continuous air --- Closed
and thermal barrier. DD: Comment closed.
B17 SD: Please review material note 58 on sheet A5.1. It appears this is a spray-foam insulation. DD: --- Closed
Material note 58 omitted, comment closed.
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Item Comment Response Status
B18 SD: Wall sections 2, 4/A5.1, we recommend providing a continuous air barrier to the CMU back-up --- Closed
wall. DD: Detail 3/A2.3 provided and addresses comment, comment closed.
B19 SD: Wall section 4/A5.1, we recommend providing a continuous insulation either at top of parapet or --- Closed
between roof plane and metal wall. This occurs at other similar details. DD: Detail 4/A2.3 provided
and addresses comment, comment closed.
B20 SD: Wall section 4/A5.1, we recommend providing continuous insulation in the wall cavity where the DD: This has been revised and will be Closed
wider CMU block is located. DD: Comment still applies to 12” wide CMU located at base of wall. shown on the final CD Phase documents.
CD: Comment closed.
B21 SD: Wall section 22/A5.7, we recommend providing a continuous air barrier and possibly an exterior DD: The manufacturer does not recommend Open
substrate over the metal walls. DD: Detail reference is now 64/A5.16. Please provide material note substrate, and continuous air barrier is a
as drawings progress. CD: Please confirm if the air barrier is a material incorporated on the part of the system. The air barrier is
backside of the metal wall panel as indicated with the linetype. Also, confirm if the seams of delineated.
the product prevent air flow from entering into the wall cavity.
B22 SD: Wall section 24/A5.7, we recommend providing a continuous air barrier from the lower roof DD: This will be modified and shown on the Open
plane up the wall to upper roof plane. DD: Detail 1/A2.4 provided. We recommend to provide a final CD Phase documents.
continuous air barrier behind metal wall panels. CD: Please confirm how the air barrier is
adhered to the metal framing.
B23 SD: Wall section 29/A5.8, we recommend providing a continuous air and thermal barrier above the DD: The air/thermal barrier is shown, but Open
window to underside of roof deck. DD: Detail reference is now 30/A5.8. It appears spray-foam better representation and notation will be
insulation has been provided. Please confirm with material note. CD: Also, if the spray-foam provided to clarify.
insulation is being provided and performs as an air barrier then note '2' for a separate air
infiltration barrier may not be required. Please review.
B24 SD: Wall section 32/A5.9, we recommend providing continuous insulation from the sill down to the --- Closed
roof plane. DD: Refer to detail 3/A2.4. Spray-foam insulation now provided, comment closed.
B25 SD: Wall section 41/A5.11, we recommend providing a continuous air barrier from the top of window DD: Not sure if this is closed as noted, but Closed
up to the top of the parapet. DD: Detail not located in review set, comment closed. the air barrier is shown and clarified on the
B26 SD: Wall section 44/A5.12, we recommend providing a continuous air barrier at the metal wall panel DD: The manufacturer does not recommend Open
locations. DD: Detail reference is now 47/A5.12. Comment still applies to provide an air barrier substrate, and continuous air barrier is a
between metal wall panels and framing where condensation may occur. CD: Please confirm if the part of the system. The air barrier is
air barrier is a material incorporated on the backside of the metal wall panel as indicated with delineated.
the linetype. Also, confirm if the seams of the product prevent air flow from entering into the
B27 SD: Wall section 65/A5.17, we recommend providing a continuous air and thermal barrier from the --- Closed
top of window to the top of the roof plane. DD: Detail reference is now 66/A5.17. Spray-foam
insulation provided, comment closed.
B28 DD: Detail 4/A2.3, we recommend to provide a continuous air barrier over the exterior substrate. DD: This is now graphically represented. Closed
CD: Comment closed.
B29 CD: For window head details similar to 7/A6.5, we recommend to review the wall cavity to Open
ensure condensation is able to weep effectively below the mortar net through the thermal
break down to the weep hole location.
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Item Comment Response Status
G1 SD: We would like to review the owner's project requirements (OPR) and the basis of design (BOD) Typically the Commissioning Agent is to Closed
or schematic design narrative. These will be used to insure that proposed systems will meet the assist the Owner in completing the Owner's
needs of the owner as stated in the OPR. We have attached an example OPR that the owner can Project Requirements (OPR). For this
use as a starting point for creating this document. We have highlighted the areas that require them project the CM has created the OPR and
to edit or add information about this project. Please contact us if anyone has questions on the has verified it with the owner.
information that needs to be included here. DD: This comment still applies. CD: OPR received
and compared to the basis of design document and we have no comments. This comment is
G2 SD: Please provide the energy model calculations for review when they are complete. OSFC Equest is used as the energy modeling Closed
requires all OSFC projects to use eQUEST (or approved equal software analysis) as part of the program. The model will be updated at
integrated design process. DD: We did not receive the energy and load model outputs, and we each design phase and outputs will be
would also like the inputs. This comment still applies. CD: Energy and load model inputs and included in phase submissions. Are you
outputs received. This comment is closed. requesting input information?
G3 SD: Please provide ventilation calculations for review when they are complete. DD: We will review Ventilation calculation will be included in Open
the ventilation calculations with the CD submission. CD: We have not received these Construction Document Phase.
calculations. Comment still applies.
G4 SD: The mechanical drawings in this package begin with Sheet M2.1. Are there drawings previous Not in Schematic Design. Additional Closed
to this that were not including in the set of drawings? DD: Additional drawings included. Comment Drawings will be added in all phases.
G5 DD: A copy of the commissioning specifications is attached for inclusion in the project book. We Open
have attempted to number the section and format it to match the project specifications as submitted
to us. If a different format or number is required, please let us know. We recommend that the
current version of the commissioning specification (23 08 00) be removed. CD: The original
commissioning spec (23 08 00) is still included in the specification, we recommend this be
P1 DD: We recommend that the engineer provide an automatic shut-off valve with emergency This will be incorporated in the CD Phase Open
pushbutton in addition to the manual shut-off valve for gas to kitchen stove (or other kitchen documents.
equipment) and for science labs. CD: Comment still applies.
H1 SD: We recommend that all air handling units are specified with hinged access doors to all sections, - We will incorporate into the Specifications. Closed
lights inside of all sections with access, and windows into sections with dampers or fans. DD: - Specification Section 237313, Article
Comment still applies. CD: This has been added to the specification, comment closed. 2.2,C.4 has been revised to read as follows:
( see attachment)
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Item Comment Response Status
H2 DD: For any fan with a variable frequency drive, we recommend that the specifications require the - We will incorporate into the Specifications. Closed
contractors to provide a sheave change so that the fan motor is producing its full rated horsepower - This requirement was included in
at a VFD speed of 100%. In this way, the controls will keep the motor speed where it needs to be to Specification Section 230593, Testing,
satisfy the system, but if there is excess fan capacity, the control system will be able to take Adjusting, and Balancing for HVAC. See
advantage of it with no other change by the owner. Very often, we see fan motors that are 75% Article 3.6,A.5. We will also include extra
loaded or less with the VFD at 100% speed. DD: Comment still applies. CD: Specification has sheave requirements in Specification
been changed, comment closed. Section 237313.
H3 SD: We recommend the engineer show design condition assumptions near air handling unit - We will incorporate into the Air-Handling Open
schedules, e.g., heating and cooling conditions for the inside and outside, stating temperatures and Unit (AHU) schedules.
humidities. Providing this information on the drawings will be useful for the school district for any - We will incorporate into the Air-Handling
future additions or alterations. DD: More information for the DOAS would also be useful. Comment Unit (AHU) schedules and/or the
still applies. CD: Design conditions are not shown on the mechanical schedules for the air schematics.
handling units. Comment still applies.
H4 SD: Please provide an analysis of why the type of chiller was chosen for use in the design. OSFC - We will provide an analysis of both chiller Closed
would like a complete analysis of air cooled vs. water cooled chillers for the projects to make sure types during the CD Phase.
that not only first cost is considered but energy and maintenance costs as well. DD: An analysis - It would not be cost effective to design
pertaining to the chillers was not included in these documents. Comment still applies. CD: indoor water chillers for this size of a
Comment closed based on engineer's response. building. The cost would be much greater
and take up more building space. The cost
of the project is currently over the budget,
and we cannot afford to add anymore to the
H5 SD: The narrative for the mechanical plans only discuss one chiller, but Sheet M2.1 shows 2 - We will revise the narrative. Closed
chillers. The drawings also show four chilled water circulating pumps and separate equipment - The narrative has been revised to indicate
accessories for the two chillers. Please review and correct this inconsistency. DD: We did not 2 chillers and the pump description has
receive an updated copy of the design narrative. Please provide the updated copy for review. CD: been revised to match the Drawings.
H6 The basis of design lists the minimum chilled beam water supply temperature as 56°F, while the - We will review temperatures and revise as Closed
maximum unoccupied space dew point is listed as 58°F. This could potentially lead to condensation necessary.
issues on the beams. Please review these temperatures. DD: The entering water temperature for - No additional response is required.
the chilled beams is shown as 57° F on the mechanical schedules. This is above the maximum
space dew point of 56°F. This comment is closed.
H7 DD: We recommend that an analog temperature or pressure gage be installed adjacent to any DDC Although it is a good idea, the budget is Closed
temperature or pressure sensor installed in a water system. If the engineer is in agreement with already a concern; therefore, we do not feel
this, then it is recommended to have this stated in the specifications and shown on the drawings so we can incorporate it into this project.
that the control contractor and mechanical contractor coordinate these locations. CD: Comment
closed based on engineer's response.
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Item Comment Response Status
H8 DD: The installation specifications for the air terminal units indicate the units should be installed to A detail has been created and will be Closed
maintain sufficient clearance for normal service and maintenance. We recommend that all VAVs included in the CD Drawings. A copy of the
and chilled beam units be installed so that they can be maintained. No pipe or duct be closer than detail is attached.
12” from the control panel side of the unit or meet code requirements and manufacturer’s
recommendations. The units should not be installed directly above a light fixture or a ceiling tile with
a speaker or fire sprinkler head which would limit access. Piping, ductwork, conduit, etc. should not
be allowed to be installed directly below terminal units. A detail should be provided which identifies
all of these requirements to avoid arguments in the field. CD: Sheet M5.4 details the installation
and clearance provisions for the terminal units. Comment closed.
H9 DD: The winter supply leaving air temperature for the heat wheel of AHU-A201 does not match the We will revise prior to the CD Phase Open
mixed air conditions for the given outside and return air temperatures and flows. The scheduled submission. 64.1 degrees, Fahrenheit is not
leaving air temperature is 64.1°F but we calculate a dry bulb temperature of 48.4° F. The entering correct. The entering air is also a typo.
CFM also appears to be incorrect, though this is not the cause of the heat wheel calculation
discrepancy. CD: Comment still applies. The conditions have not been updated.
C1 SD: Controls General Comment: It is recommended that some type of controls schematics, Sequence of operations will be included with Open
sequences of operation, and points list be provided in the design drawings to clearly communicate the Specifications. We will review the need
to the controls contractor the number of sensors and their specific location in the system. DD: This for control schematics and points list during
schematic is also useful in describing the use of each sensor in the system. For example, a control future phases.
sequence may be accomplished with just one discharge air sensor in the unit. However, the owner
may desire a sensor in the mixed air section and after each coil for diagnostic purposes. A
schematic is very helpful during the commissioning process to determine if the controls contractor is
meeting the design intent. Additionally, after a period of years drawings are typically retained but
specifications are often missing, leaving no record of the designed operating sequence. CD:
Comment still applies.
C2 SD: As the specification is written, we recommend that the control graphics be described in great Would a control schematic be sufficient? Open
detail for each system. In many cases we see the specification call for graphics but with no
description of what is to be shown on them. DD: We recommend the specifications state as a
requirement that all points and alarms pertaining to that system be displayed somewhere on the
graphic screens. At a minimum, start/stop points, schedule, all set points, reset schedules, inputs,
and outputs for each system need to be shown. Labeling of alarms is also a continual problem.
We also recommend that all set points be adjustable and that the acceptable range of adjustment
be stated in the as-built sequence of control. Some control systems allow inputs to be changed
(e.g., Invensys and Honeywell allow this for some inputs). For systems that do not have this
feature, all sensor inputs should be required to be brought into a virtual point so that the virtual point
can be manipulated for system testing.CD: Comment still applies. A control schematic would be
helpful for describing some of these points, but a list of the requirements for the graphics
would ensure that all desired points, setpoints, schedules, and alarms are properly
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Item Comment Response Status
C3 SD: We recommend that the engineer show the approximate location of remote sensors such as Devices will be identified in the Closed
duct static pressure sensors and hydronic system differential pressure sensors on the design M6 Drawings.
drawings rather than leaving their location up to the contractor. Often, when location is left up to the
contractors, we see them placed in locations that are convenient for the contractor but not
necessarily the best location for serving their intended purpose. Also, it should be stated that the
contractor shall note the exact location of the remote sensors on the as-built control drawings for
future reference. DD: Sensor locations have been shown on the drawings. This comment is closed.
C4 SD: Heat wheel control has consistently been a problem on nearly every OSFC project we have Sequence of operations will be included with Open
commissioned. The problems usually start with an ambiguous sequence of operation for the heat the Specifications. Please review and
wheel and we recommend that close attention be paid to this part of the system. We would be comment where necessary.
happy to discuss this in more detail with the engineer to share some of the lessons learned on other
jobs. DD: The air handling units specify an integrated sequence for heat wheel control. However,
there is not a detailed set of sequences for the heat wheel in the DOAS section or the sequence of
operations for the dedicated outside air unit. We recommend more clarification to ensure proper
C4 Contd CD: Sequence of operation has been included in the specification in the DOAS section. As
this unit is 100% outside air, we are confused as to what is implied by "economizer" in the
heat wheel sequences. Please clarify.
C5 SD: We recommend providing labeling for all control system sensors, panels, and actuators. The We will incorporate into the Specifications. Open
names on the labels should be required to match the point names given on the computer graphics
and also shown on the as-built drawings. We recommend that the specifications clearly state the
requirement for labeling the control system. DD: Comment still applies. CD: A labeling
requirement could not be found in the specification. Comment still applies.
C6 DD: We have seen many problems in the field involving interface of controls between the building We will review in the CD Phase and provide Closed
automation system and other equipment that is provided with manufacturer's controls. Simple as necessary
statements in the specification that require all panels to communicate via Bacnet or Lon tend to
leave the door open for problems. Where possible, we recommend that the building automation
system contractor be responsible for control of as much of the systems as is practical. We do not
recommend packaged controls for pumping systems or energy recovery units as these systems can
easily be picked up by the BAS contractor. Where interface is required, such as at boilers, chillers,
or heat pumps, we recommend that contractor's various responsibilities be described in great detail.
C6 cont'd The dedicated outside air handling unit will require more coordination with regards to integrating the
internal controls and the network interface. Please specify which points are necessary for
monitoring and include this information in the sequence of operations and the section detailing the
DOAS. CD: Information describing the equipment interfacing for the boilers, chillers, etc. is
provided in Section 23 09 00 Article 1.8. A list of points for the DOAS controls
communication is included in Section 23 73 16 article 2.13. Comment closed.
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Item Comment Response Status
C7 DD: We recommend that the specifications note that the controls contractor shall convene a pre- We will review in the CD Phase and provide Closed
submittal meeting with the engineer and commissioning agent within one month of the notice to as necessary
proceed. The purpose of this meeting is to review the sequences of operation, outline where the
proposed system deviates from the specified sequence of operation, and identify potential problems
with the specified sequence. Once the sequences of operation are agreed to by all parties, the
contractor should proceed with the formal controls submittal process. In addition, we recommend
that the control contractor should be required to submit a print out of all graphics proposed for the
project within one month following submittal approval. These should be reviewed jointly by the
owner, engineer, and commissioning agent. CD: Pre-submittal meeting is specified in the
contractor responsibilities in Section 23 09 00 Article 1.6.H. Comment is closed.
C8 DD: Condensate sensors are shown on the drawings and discussed in the sequences of operation, We will review in the CD Phase and provide Open
but not mentioned in the DDC or chilled beams specifications. Please identify the party responsible as necessary
for providing this item. We also recommend that the condensate sensor be required to be
thoroughly cleaned when construction is complete but prior to owner occupancy. Previous
experience has shown that these sensors will give false readings if dirty. CD: Condensate sensors
are still not discussed in the DDC or chilled beam specifications. Comment still applies.
C9 DD: We recommend including a high temperature or enthalpy limit to disable the economizer for the We will review in the CD Phase and provide Open
air handling units. CD: Comment still applies. as necessary
C10 DD: More information should be provided to clearly communicate the lead/lag sequencing for the We will review in the CD Phase and provide Open
boilers and the chillers. This should include a time delay before the lag equipment enables or as necessary
disables as well as how often the equipment rotates the lead position. CD: Comment still applies.
E1 SD: General: We recommend the generator remote annunciator panel be located at administration The remote annunciator will be located for Closed
office area or custodial office for monitoring. DD: Comment still applies. CD:Generator Panel is convenient access by staff as indicated.
located in main mechanical room. Comment closed.
E2 SD - Sheet E6.1 Fire Alarm Plan: We recommend locating main fire alarm panel in the The fire alarm control panel has been Closed
administration office area for convenient monitoring and operation. Add pull stations at building located in the same room as the telephone
exits. Consider adding smoke/heat detectors in mechanical/electrical technology rooms. DD: service demarc in an effort to minimize the
Engineer's preference. communication line run distance. Pull
stations and detectors will be included as
E3 SD: Sheet E4.1, Classroom Lighting: Please provide a detailed sequence of operation for the Details will be provided with the Open
classroom dimming system including foot-candle levels required. Note: Not all light fixtures in Construction Documents. Light levels will be
classroom should be dimmed at the same rate. Consider multiple zones due to more daylight near designed around Ohio School Design
window wall and much less daylight on the corridor side of room. DD: Comment still applies. CD: Manual (OSDM) and Leadership in Energy
Lighting Control Schedule has been added. Control Schedule indicates 35FC, however and Environmental Design (LEED)
OSDM lists 50 FC for direct lighting systems. Please revise foot-candle level. recommendations. The level of daylighting
zone control will be provided to the best
extent allowed within the project budget.
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Item Comment Response Status
E4 SD: General: We recommend emergency lighting in all electrical closets, tech closets, mechanical We will comply Closed
and electrical rooms. DD: Completed.
E5 SD - Sheet E5.1 Power Plan: Feeders to DP-B are shown installed above the ceiling. Contractors Drawings will be revised giving the Closed
install a large portion of the feeders below the floor slab to save time/cost. Please reconsider. DD: Contractor the option of installing feeders
Completed. underground or above ceilings.
E6 SD - Sheet E7.1 Single Line: Please consider 480/277 volt as the distribution voltage in lieu of Considering the length of feeders versus Closed
120/208 to save the cost of additional and larger wiring and larger capacity equipment. DD: the addition of transformers (including
Engineer's preference. space, heating load, and energy losses), we
believe that greater cost and energy savings
will be achieved using
E7 SD - Sheet E7.1 Single Line: We recommend a grounding electrode detail be included on the Grounding details will be provided on the Closed
drawings. DD: Completed. E1 Series Drawings as well as in the Project
E8 SD: Please locate spare fuse cabinet on drawings in electrical room. DD: Comment still applies. The cabinet will be shown on Construction Open
CD: Two spare fuse cabinets are now shown in main electric room Sheet E6.3. Documents.
E9 DD: Sheet E1.3: Detail #11 - Please evaluate "a/b" switching for these 6-Lamp fixtures. Far right Will evaluate and revise accordingly Open
fixture seems appropriate where "a" ballast controls (4) outboard lamps (Two on each side of
fixture). However, the other two fixtures seem to depict the "a" ballast controlling just (2) outboard
lamps (One on each side of fixture). CD: "d" night light ballast neutral/hot is shown from two
different power sources. Please correct.
E10 DD: Sheet E1.3: Detail #11 - Reference is made to an emergency fluorescent power unit. Should Reference to the emergency fluorescent Closed
this portion of the detail actually be depicting a night light switching scheme. Please clarify. CD: power unit will be deleted.
E11 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - Neon pilot light adjacent to S2: Please Neon light will indicate that sufficient natural Open
clarify the purpose of this device. Include in sequence of operation if applicable. CD: Can LED pilot daylight is present to allow manual dimming
light be specified in lieu of neon light for longer lamp life? of electric lights when the system is in
daylight by-pass mode. See Note No. 1 on
the E4 series drawings.
E12 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - Master S2 switch at teacher's desk: Quiet Time (Study Time) control sequence Closed
"Quiet Time 1 Hour" mode is not referenced or defined in sequence of operation. CD: Completed. will be clarified.
E13 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - S1 and S2 switch master On/Off Daylighting control sequence will be Closed
button: When this button is pushed "On" will the daylight harvesting system be activated also. clarified.
Please clarify and include in the sequence of operation. CD: Completed.
E14 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - We recommend switching stations S1 Switch plates are specified to include Closed
and S2 be provided with labeling of buttons. CD: Completed. engraved or permanently silk-screened
legend in Specification Section 260943.
E15 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - In the sequence of operation "Daylight Daylighting control sequence will be Closed
Override" is said to close relay R3. This implies that the lighting fixtures controlled by R3 will come clarified.
on even tough the daylight harvesting system has them turned "Off". If this is the case please take
note that the fixtures with R3s next to them are not near the window so these would not be the
fixtures you would expect the daylight harvesting system to have turned "Off". Please evaluate. CD:
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E16 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - In the sequence of operation "Daylight Daylighting control sequence will be Closed
Override" is said to close relay R3. Will this mean that the lights come to "Full On"? Please clarify. clarified.
E17 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - The sequence of operation does not Control sequence will be clarified. Closed
mention control of relay R4. Relay R4 is shown one time at a single fixture. Please clarify. CD:
E18 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - In the sequence of operation Control sequence will be clarified. Closed
occupancy sensor will automatically open R1 relay. Does this mean that all lights will go out?
Please clarify. CD: Completed.
E19 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - In the sequence of operation the "A/V Control sequence will be clarified. Closed
Light" mode is said to close relay R1 and open relays R2 and R3. What is the overall lighting goal
of this mode? Or what do relays R1, R2 and R3 actually control. Please clarify. CD: Completed.
E20 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - Fixtures have step dimming ballasts. Yes. Closed
Will these ballasts step the fixture lamps in a single 50% increment? Please clarify. CD:
E21 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - Fixtures have step dimming ballasts. Control sequence will be clarified. Closed
Will the day light harvesting system ever control the lamps to "Off"? Please clarify. CD: Completed.
E22 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - The "Daylight Dimming Zone" is Daylighting control zone is always the first Closed
depicted as the first two rows of lighting fixtures nearest the window. Will this zone look the same in two rows of lighting nearest the windows
the deeper kindergarten classrooms B105, B107 and B109. Also, what will the daylight dimming unless noted otherwise on the lighting plans.
zone look like in first and second floor end classrooms B112 and B207. Could these dimming zones
be depicted on the plan drawing for each individual classroom to eliminate confusion. CD:
E23 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - We recommend defining acceptable Daylighting control sequence will be Closed
footcandle levels in the classrooms when under day light harvesting mode. We recommend clarified.
defining these levels in terms of elevation such as "at desk height". We recommend stating that the
lighting fixtures controlled by the day light harvesting system shall be at there lowest level of light
output when natural light plus the artificial light (at its lowest setting) exceeds the minimum
requirements of the space. CD: Completed.
E24 DD: Sheet E1.4: Typical Classroom Wiring Diagram Detail - We recommend lighting control Part 3 of Specification Section 260943 will Closed
representative/technician be required to provide initial set up of lighting control systems with be reviewed and revised accordingly to
demonstration and training to owner/commissioning agent and also post commissioning repairs and clarify both pre and post commissioning
adjustments based on commissioning report. It should be specifically stated that these two requirements.
requirements will be accomplished during separate time frames implying separate site trips for each
provision. (Often we find manufacturer's representatives hesitant or unwilling to return to make
repairs and adjustments needed after discovery by commissioning agent.) CD: Completed.
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E25 DD: Sheet E4.1: Electrical Room A126 - We recommend rotating lighting fixtures 90º to their We will review. Closed
current orientation to run length wise with the switchgear equipment in the room. CD: Engineer's
design preference. Comment closed.
E26 DD: Sheet E4.1: Corridor A122 - We recommend that can lighting fixture at south end of corridor We will review. Closed
near intersection of Corridor A112 be placed on emergency circuit. CD: Completed.
E27 DD: Sheet E4.1: Music A124 - This room has a photo sensor shown. However, there is no lighting The daylighting control sequence will be Closed
control detail for this space. Please clarify day light harvesting requirements for Music Room. CD: clarified.
E28 DD: Sheet E4.1: Gymnasium A147 - North side of gymnasium plan indicates lamp ballast control Lighting plan and typical details will be Closed
configuration. This configuration information does not seem to match up with Detail #11, on Sheet reviewed, coordinated, and revised to agree.
E1.3. If this lamp ballast control configuration information and Detail #11 are to match please
provide cross reference information on plan. CD: Completed.
E29 DD: Sheet E4.3: Stairs B100 - Type "FW-1X" lighting fixture at east side of stair may be positioned We will clarify in CD Phase. Open
under the stair landing. However, there is no mounting height for the FW-1X fixtures. Please clarify.
CD: Wall mount fixtures should include mounting height. Comment still applies.
E30 DD: Sheet E4.4: Stairs B111 - This stair has only (2) type "F22-X" lighting fixtures at its top. Will evaluate and revise accordingly. Open
Lighting level in stairwell may be low particularly at the bottom. Please evaluate. CD: Fixtures are
now type F-8X and are not on fixture schedule. Please revise.
E31 DD: Sheet E5.1: Main Cross-Connect A101 – A minimum of two emergency 120V circuits must be Emergency circuits will be provided. Open
provided in each technology Room for UPS connection per OSFC standards, Chapter 8, Section
1.09 Technology, Item D. CD: Comment still applies.
E32 DD: Sheet E6.1: Electrical Room A126 - Provide pull station at exterior exit from room. CD: A pull station will be included. Closed
E33 DD: Sheet E6.3: Main Electrical Room A126 – As currently depicted some pieces of the main A wider door will be provided in the electrical Closed
switchgear may not fit through the door of the electrical room. Please evaluate. CD: Completed. room.
E34 DD: Sheet E6.3: Kitchen A130 - Reminder all 120V receptacles for this area must be GFI type per Ground-fault circuit interrupter (GFCI) Open
NEC 210.7, (B), 2. CD: Comment still applies. See circuits ALX2 for reach-in refrigeration. protection will be provided. Receptacles
Please verify all kitchen circuiting for required GFCI protection. that are not readily accessible will be
protected at the circuit breakers.
E35 DD: Sheet E6.3: Mechanical Courtyard – We do not find specification for generator connection Clarification will be included in CD Phase. Open
cabinet. Please provide additional noting for this piece of equipment. CD: Comment still applies.
E36 DD: Sheet E7.1: Single Line Diagram - We do not find information in switchgear specification or on Clarification will be included in CD Phase. Open
single line diagram for kirk key switch depicted in switchgear. Please provide additional noting for
this piece of equipment. CD: Comment still applies. Also, Surge Arrestors are included in this
specification. If this is a requirement we recommend the device being shown on the single
line diagram to ensure it's installation.
E37 DD: Sheet E7.1: Single Line Diagram - For safety and maintenance purposes we recommend that Feeder protection and panel disconnect Closed
Panels ALX1 and ALX2 each be provided with a MCB as they are fed directly downstream of an means are provided ahead of the ATS for
automatic transfer switch with two potential power sources. CD: Engineer's design preference. both power sources.
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E38 DD: Sheet E7.1: Single Line Diagram - ATSs are shown as 4-Pole. Neutral at generator should be Grounding is shown on Drawing No. E1.2, Closed
indicated as being bonded to generator ground. CD: Completed. Detail No. 10.
E39 CD - Sheet E5.3: Recommend elevator sump pump and auto-door operators be on emergency Open
power in lieu of normal power.
E40 CD - Sheet E2.1 Site Plan: Indicate site lighting conductor sizes and homerun panel. Open
E41 CD - Sheet E4.1: Spotlights in center of gym do not appear to be protected from thrown balls. Open
Please consider another location. Switches in gym should be key operated in lieu of standard
E42 CD - Sheet E4.1: Are two wall mount occupancy sensors needed in administrative offices? Open
E43 CD - Sheet E4.3: Lighting levels may be low in rooms B130 and B133 due to number of Open
fixtures shown. L-22 light fixture type not on fixture schedule. Same comment for rooms
B222 and B223.
E44 CD - Sheet E6.3: Will domestic hot water recirc pump run 24/7? Pump may need a T-stat Open
controller. This motor should have a local fractional HP manual motor starter/disconnect
E45 CD - Sheet E5.1: Suggest indicating grounding bar locations in all technology rooms. Smoke Open
detectors are shown twice in student dining.
E46 CD - Sheet E5.4: Smoke dampers are shown twice. Provide a schematic detail for smoke Open
damper actuator wiring and circuit requirements. "FAPS" will require 120 volt emergency
circuit and FAPS panel should be shown on the fire alarm plans.
E47 CD - Sheet E7.1 Single Line Diagram: Panels BLX1, ALX3, BLX2 are 225A on diagram and Open
100A on panel schedules.
E48 CD - Sheet E7.1 Single Line Diagram: Why (2) 400A spare switches in MSB and no 100/60/30A Open
E49 CD - Generator Specification 263213: We recommend adding requirement for on-site load Open
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