0551B 07g - CD - Cx Comments

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0551B 07g - CD - Cx Comments Powered By Docstoc
					STAN Engineers
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                                                                    Xenia City School District
                                                              Commissioning Design Review Comments
                                                                    Construction Documents

School Name:     McKinley Elementary
Project No.:     10-1632.02
Date Issued:     January 7, 2011
Issued By:       Philip J. Becker, PE, LEED AP, Commissioning Authority,
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
      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
    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
                                                                                                                           061600, Sheathing.
    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,
          comment closed.
             Exterior wall materials
             Thermal insulation
             Air barrier
             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
                 Light Fixtures
                 Electrical outlets
             Typical roof penetrations
                 Plumbing vents
                 HVAC vents
                 Equipment curbs
                 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
          wall cavity.
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)

    238afbb6-0044-4378-8a29-b8ffeedf87e5.xlsx                                                                                                                          Page 5
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.
          Comment closed.
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

   238afbb6-0044-4378-8a29-b8ffeedf87e5.xlsx                                                                                                                              Page 7
  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
                                                                                                                    208/120-volt distribution.
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.
          Comment closed.
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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Item                                                   Comment                                                                       Response                             Status
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.
          CD: Completed.
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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Item                                                  Comment                                                                       Response                            Status
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.
          Comment closed.

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Item                                               Comment                                                               Response                        Status
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
          bank testing.

238afbb6-0044-4378-8a29-b8ffeedf87e5.xlsx                                                                                                            Page 13

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