Attachment- 41 07 Electrical Narrative.pdf

VA PROJECT NUMBER

PROJECT NAME

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

SUBMITTAL 100% Bid Documents SUBJECT Electrical Narrative

Electrical 1

DIVISION 26 - ELECTRICAL

1. GENERAL

A. The electrical portion of this project will include support for the following on the Sam Rayburn Memorial VA Medical Center campus:

1. Provide normal and essential power for a new Data Center on the 5th floor of building 1. This shall include new fully-redundant UPS’s and busways in accordance with the VA OIT Infrastructure Standard for Telecommunications Spaces.

2. Provision of normal and essential power required for the modifications to the existing telecommunications rooms.

3. Renovation of OI&T closets as indicated in the drawing package to include room modifications.

4. Additional power and data drops for end user deployment equipment.

5. Design in accordance with VA design guides and applicable standards and codes.

B. Specific provisions for this project will include evaluating the electrical service to each of the buildings being affected, providing new rack-mounted UPS systems, and expanding electrical distribution as required. Each telecommunications room (TR) will be evaluated to have the required number of circuits & receptacles for the number of data racks. The critical branch of the essential electrical system (EES) will be used to serve circuits in the TR’s where critical power is available. All telecommunication rooms will be evaluated to ensure all equipment complies with single point grounding per OEHRM design guidelines.

2. ELECTRICAL CODES AND STANDARDS

A. Architectural Barriers Act (ABA) Standards

B. VA Barrier Free Design Standard (A Supplement to the ABA)

C. ASHRAE Standard 90.1-2019 – Energy Standard for Buildings Except Low-Rise Residential Buildings

D. Illuminating Engineering Society (IES) Handbook, 10th Edition

E. IEBC 2021 – International Existing Building Code

F. IECC 2021 – International Energy Conservation Code

G. JCAHO EC 7.40 – Emergency Electrical Power System Inspection, Maintenance, and Testing

H. NFPA 70-2020 - National Electrical Code (NEC)

I. NFPA 99-2021 – Health Care Facilities Code

J. NFPA 101-2021 – Life Safety Code

K. NFPA 110-2022 – Standard for Emergency and Standby Power Systems

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 2

L. NFPA 111-2022 – Standards on Stored Electrical Energy Emergency and Standby Power Systems

M. NFPA 780-2020 – Standard for the Installation of Lightning Protection Systems

N. VA PG-18-10 Electrical Design Manual, December 2019

O. VA PG-18-10 Lighting Design Manual, January 2022

P. VA PG-18-10 Telecommunications and Special Telecommunications Systems Design Manual – February 2016

Q. Office of Information and Technology (OIT) Infrastructure Standard for Telecommunications Spaces v3.1 (1 July 2021)

R. OEHRM Site Infrastructure Requirements

S. VA PG-18-10 Physical Security and Resiliency Design Manual, June 2023

3. ELECTRICAL DEMOLITION

The following items are anticipated to be demolished.

A. Removal of existing UPS system and normal/emergency power services in the existing server room.

B. Removal of all existing rack-mounted UPS’s in the TR’s.

C. Removal of all existing rack-mounted receptacles in the TR’s, including all conduit and conductors.

D. Receptacles located in each telecommunications room will be analyzed to confirm they are on the proper branch of the EES. Any outdated, hazardous, or improper receptacles will be demolished, or new conductors will be provided from the critical branch of the EES.

E. Each TR’s lighting will be analyzed to ensure it is meeting the current VA design manuals. If non-compliant, light fixtures will be demolished and replaced with new.

4. SITE POWER DISTRIBUTION SYSTEMS

A. Replacement and/or addition of generators is outside the scope of this project.

Information in this section is included to provide context of existing emergency electrical distribution systems across the campus.

1. Buildings 8, 9, and 10 lack emergency power generation, hence there is no critical branch to serve the telecommunication equipment. New telecom will be connected to the normal power branch and provided with standard, 10-minute-runtime UPSs per advice from DCIE. Refer to appendix C item 38 from 65% Design Coordination Review comments.

2. The building 29 generator is expected to be replaced due to lack of spare capacity.

New duct banks will likely be required to serve the new distribution equipment inside of building 29.

5. BUILDING POWER DISTRIBUTION SYSTEMS

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Electrical 3

A. A complete load analysis was conducted while on site for each of the existing telecommunication’s spaces. Sufficient metering data was available to confirm the spare capacity for the critical buildings on campus.

1. A load analysis will determine the loading requirements for each TR. The A/E will do the following:

a) Utilize the information gathered while on site and include additional safety factors for future growth. Provide UPS’s and additional electrical equipment that is sized based off of this analysis. Equipment in each TR will meet the latest VA OIT Design Manual; however, the upstream equipment will not be modified unless determined that future growth is unachievable with the current configuration. An addition 25% safety factor has also been applied to allow for additional equipment implementation in the future.

B. Due to recent changes in VA and BICSI requirements, it is likely that the TR’s through-out the campus are not properly grounded. If a main ground bar is existing at the main electrical service of each building, then a new main telecommunications ground bar (MTGB) will be established for the main TR in each building. If a main building ground is not established at the main electrical service of any building, then a new earth ground will be established, tied to a new main electrical service ground, and then extended to establish a new MTGB for the main TR in that building. If TR’s do not have a copper ground bar, then they will be replaced.

6. RACK-MOUNTED UPS SYSTEM

A. A traditional rack-mounted UPS system is planned to be utilized for all of the TR’s.

This will include a rack-mounted zone power distribution unit (PDU) in each space and dedicated rack-mounted UPS’s for each rack.

1. Each zone PDU has two (2) inputs. Each input will require it’s own power source.

One side of the PDU will be powered by a critical power panelboard and the other from a normal power panelboard.

2. The size and location of the zone PDU is determined based off of the latest VA specifications. Each scenario can be seen in Appendix A.

B. Each UPS will be sized to provide a minimum of 10-minute run-time for all connected loads in accordance with the latest VA Physical Security and Resiliency Design Manual.

7. BUILDING LIGHTING SYSTEMS

A. The lighting in each TR will be analyzed to ensure it is up to the latest VA standards. If the standards are not being met, then new lighting will be provided in the TR.

8. ELECTRICAL CALCULATIONS

A. Voltage drop calculations will be performed for all new feeders and branch circuits.

Feeders and branch circuits will be sized to limit voltage drop to the levels recommended by the energy code (2% for feeders, 3% for branch circuits, with the

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 4 combined drop no more than 5%).

B. Preliminary fault currents will be calculated to determine the available interrupting current (AIC) rating for all new electrical equipment. These calculations will be performed via SKM PowerTools for Windows software. Final fault current and arc-flash calculations will be performed by the electrical equipment supplier and based upon installed equipment on the project. A protective device coordination study will also be performed by the electrical equipment supplier and all recommended settings will be implemented at the time of installation.

9. GENERAL ELECTRICAL EQUIPMENT

A. Building Lightning Protection

1. All new rooftop mounted equipment will be bonded into existing lightning protection systems in accordance with NFPA 780.

B. Switchboards and Distribution Panelboards

1. New distribution panelboards will be sized for the loads they serve and include 30% spare capacity and spare space. Panelboard bussing will be copper. The distribution panelboard ampere interrupting current (AIC) rating will be fully rated and sized based on the available fault current. Floor mounted distribution panelboards will be mounted on a 4” tall concrete house-keeping pad.

2. New circuit breakers in existing switchboard and distribution panelboards will have available ampere interrupting current (AIC) ratings to match the panelboard.

C. Surge Protection

1. A Type 2 Surge Protective Device (SPD) will be provided at panelboards that serve sensitive electronic equipment.

D. Panelboards

1. New panelboards will be provided as required for the project. Panelboards will include main circuit breakers where required by the NEC and bolt-on style circuit breakers. 20% spare capacity will be provided per the VA Electrical Design Manual. Bussing will be copper. Fault currents will be calculated to determine the AIC rating for the panelboard and circuit breakers. All panelboards and circuit breakers will be fully rated.

2. Panelboards will be provided with clear, concise schedules.

E. Disconnect Switches

1. New disconnect switches will be provided for HVAC equipment. Switches will be heavy duty style, rated for the environment installed in and fused if required to protect equipment from high available fault currents. Disconnecting means will be provided within sight of all motors and other equipment.

2. Motor-rated disconnect switches will be provided for any fan-powered boxes.

F. Building Feeders, Branch Circuits, and Raceways

1. All conductors will be copper and routed within raceways.

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Electrical 5

2. A copper ground conductor will be routed with all circuits except building service entrance feeders.

3. Minimum raceway size will be 3/4” above grade and 1” below grade.

G. Wiring Devices

1. Receptacles will be hospital grade, NEMA 5-20R grounding type, and ivory in color as required by the VA design guide.

2. Cover plates will be 302 brushed stainless steel. Cover plates for devices fed from emergency circuits will be 302 brushed stainless steel and engraved with “EMERGENCY” with red letters.

3. Tamper-resistant receptacles will be hospital grade, NEMA 5-20R grounding type, and gray in color.

4. Ground-fault circuit interrupter (GFCI) style duplex receptacles will be provided within 6’ of all sinks.

5. Exterior receptacles will be weather-resistant, GFCI style duplex receptacles and be provided with while-in-use covers.

H. Grounding and Bonding

1. Equipment grounding conductors will be installed with all feeders, and power and lighting branch circuits.

2. All metallic raceways will be grounded and the equipment grounding conductor will be bonded to all junction boxes, pull boxes, enclosures and panelboards.

3. New equipment installed will comply with single point grounding per

ANSI/NECA/BICSI 607-C.

4. Each telecommunications room will be analyzed to ensure it is meeting VA design standards for internal Communications Circulating Grounding System (CCGS).

This includes:

a) Ensuring all equipment is properly grounded to the Telecommunication Ground Bar (TGB)

b) Ensuring the TGB is connected to the Telecommunications Main Grounding Busbar (TMGB).

5. See Appendix A for General Grounding and Bonding Diagram for each telecommunications room

6. See Appendix A for General Grounding and Bonding requirements for each building (per 2016 VA Telecommunications Design Guide, Appendix A).

I. Labeling/Nameplates

1. All new and/or modified low-voltage building electrical distribution equipment will be provided with new phenolic resin labels screwed to the equipment. Normal power distribution equipment will have white lettering on a black background.

Essential electrical distribution equipment will have white lettering on a red background. Lettering will be ½” tall and include the name of the equipment, name of the equipment it is fed from, and the sizes of the conductors that it is fed

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 6 with.

2. All new wiring device cover plates will be labeled with a permanent adhesive label listing panel and circuit feeding the wiring device.

10. GENERAL LIGHTING EQUIPMENT

A. Building Lighting

1. TR lighting will consist of strip light style fixtures with LED light sources with integral lamps and drivers. Drivers will be a minimum of 85% efficient at full load, have a power factor greater than 95%, total harmonic distortion less than 20%, and operate with a universal 120/277V input. All lights will be serviceable from below the ceiling. All light fixtures in the TR’s will be connected to the critical branch of the EES.

B. Lighting Controls

1. Standard manual light switches will be quiet toggle type, specification grade and ivory in color as required by the VA design guide. Manual light switches will be utilized in spaces where automatic control of lights is detrimental to the occupant, such as in electrical and mechanical rooms.

11. PHYSICAL SECURITY

1. This project will address all physical security deficiencies as outlined by the physical security consultant as outlined in the “Physical Security Risk Mitigation Design Guidance”. This will include, but is not limited to, intrusion detection, access controls, security cameras, and panic-duress.

END DIVISION 26 DESIGN NARRATIVE

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 7

Appendix A: Drawings

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 8

General Grounding and Bonding Diagram for each telecommunications room:

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 9

General Grounding and Bonding requirements for each building (per 2016 VA Telecommunications Design Guide, Appendix A):

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 10

Rack-mounted Equipment (per 2020 VA Infrastructure Standard for Telecommunications Spaces):

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 11

Appendix B: Calculations

PROJECT NAME: EHRM INFRASTRUCTURE UPGRADE–BONHAM, TX DATE: May 23, 2023

FOR: FWVAMC/NIHCS

BY: Ian Collins

CHECKED BY: Evans Sordiashie, PE.

PROJECT No.: 549A-21-700

COMMENTS: Estimated load calculations are based on historical data from previous designs and NEC 2020.

Server Room

Devices/Equipment Quantity Average Estimated Load (W) **Demand Factors Estimated Demand

Load (W)

Modem/Demarc 2 500 100% 1000

Server Cabinets 9 3500* 63% 19845

HDA Network Cabinets 2 2800* 63% 3528

MDA Network Cabinets 4 3500* 63% 8820

Misc. Telecom Equip -- 3500 100% 3500

*kW heat load for Generic Small Data MCR as electrical Loads.

**Demand Factors deduced from Spur Design Historical and Metering Data.

36693

3669.3

40362

50 kW

Sub total (W)

Total Estimated UPS Size

(@85% Design Capacity)

Total Estimated UPS Load (W)

10% future Growth (W)

549A-21-700 (Spur 2216) EHRM Infrastructure Upgrades – Bonham, TX

Electrical 12

Appendix C:

65% Design Coordination Review

DESIGN COORDINATION AND REVIEW-COMMENTS

COMMENTS BY TITLE/ROLE PHONE

Andrew Stevens Project Manager 405-673-2146

PROJECT TITLE AND LOCATION TYPE OF REVIEW

X 65% DESIGN DEVELOPMENT

Bonham EHRM Infrastructure Upgrades 100%

Bonham, TX FINAL

OTHER

DWG. NO. OR COMMENTS REVIEW ACTION - CONCUR/NON-CONCUR

PAR. NO. (Make general comments after specific comments) (& reasons where significant)

1 HEFP E-402 ARCH

2 HEFP E-402 ARCH

3 HEFP ARCH

4 HEFP AE-108 ARCH

5 HEFP AE-109 ARCH

6 HEFP M-402 MECH

7 HEFP MECH

8 HEFP MECH

PROJECT NO.

549A4-21-700

DATE

February 24, 2023

See RFI 005

FRP is called out on room schedule, mounting details and elevation will be added next submission

See RFI 006

47kW was the calculated heat load with the telecom equipment and environmental load combined. The 49kW is expected to meet the N+1 redundancy requirement. Narrative to be updated for the next submission.

CFD analysis will be included in the next submission.

Narrative will be updated with MCR information in the next submission.

TR's serving multiple floors. Building 4 only shows 1 TR but has more than one level, this and any other buildings that have TR's servicing multiple floors need to submit a variance/exception request

65% - AE stated a Variance will be submitted

TR's serving multiple floors. Building 9 only shows 1 TR but has more than one level, this and any other buildings that have TR's servicing multiple floors need to submit a variance/exception request

65% - AE stated a Variance will be submitted

CATEGORY

Operating conditions in the MCR are between 72°F and 81°F at the IT equipment inlet; design is based on these conditions. conditions in

TR's are detailed but MCR not detailed in narrative at 35%.

Satisfactory Computational Fluid Dynamics (CFD) model for non-standard MCR design is presented, new and existing, includes any updates to CRACs. Note: DCIE to review (MCR). Not detailed in narrative at 35%. CFD is expected at 65%

65% - Not included. Odd shaped data center with non uniform placement of the CRACs should trigger a CFD model for inclusion in the 65%

Heat rejection capacity at N+1 is matched to the ultimate design capacity for the MCR. Not detailed in narrative at 35%. Additional details are expected at the next stage of design

65% - 2 each CRACs at 166MBH or 49kW. At N+1 49kW seems more appropriate than the 100kW for each UPS unit. It is difficult to find where the AE is determining sizing of the CRACS and UPS.. they should be based on a similar load

Devise on wall is Mechanical Unit. It is mounted high on wall, but we can move the rack plan south and still meet the 3/3/3/1 rule.

Devise on wall is Mechanical Unit. It is mounted high on wall, but we can move the rack plan south and still meet the 3/3/3/1 rule.

White painted walls/backboard. Fire retardant backboard. not detailed in narrative or drawings

COMMENT

NO.

COMMENTS BY:

TRs are of a standard form factor (typically 10’x10’ for 2 channel racks, 8'x10' for 1 channel rack) with an 8’ tall door. 65% - Most

TR's except for B1 TR116A appear to fit the standard. While 3 feet clearance is desired around all 4 sides of a rack it is acceptable to have

3' front and back and one side at 3'. However the other side should have minimum 1' clearance. Detail 4 seems to show the rack right against a device on the wall. Suggest moving the rack 12" plan south.

Network racks in TRs are centered with 3’ clearance around (not against a wall). Exception Memo process shall be leveraged for specific TRs that can not meet this requirement after exhausting due diligence. 65% - Most TR's except for B1 TR116A appear to fit the standard. While 3 feet clearance is desired around all 4 sides of a rack it is acceptable to have 3' front and back and one side at 3'. However the other side should have minimum 1' clearance. Detail 4 seems to show the rack right against a device on the wall. Suggest moving the rack 12" plan south.

9 HEFP

Mechanical 2

M601

MECH

10 HEFP M-402 MECH

11 HEFP

E-601

T-302

ELEC

12 HEFP

E-601

T-302

ELEC

13 HEFP Electrical 3 ELEC

14 HEFP E-402 ELEC

15 HEFP E403 ELEC

16 HEFP

Elec Narrative pg

ELEC

TRs are provided with dedicated heat rejection systems (typically mini-split

DX systems).

Dedicated cooling for anticipated active critical load is specified. Each network rack has 5kW of electrical capacity. Each installed enclosure requires 5kW (17,000 BTU/h) of cooling capacity to be available, but in aggregate 5kW per enclosure is not required. Design heat rejection capacity in these telecommunications spaces as follows:

Dedicated cooling for anticipated active critical load is specified. Each network rack has 5kW of electrical capacity. Each installed enclosure requires 5kW (17,000 BTU/h) of cooling capacity to be available, but in aggregate 5kW per enclosure is not required. Design heat rejection capacity in these telecommunications spaces as follows:

a. 1 rack TR = 5kW (e.g. single 5kW cooling unit).

b. 2 rack TR = 7kW (e.g. 3.5kW x2 cooling units).

c. 3 rack TR = 8.5 kW (e.g. 3.5kW + 2.5kW x2 cooling units).

d. 4 rack TR =10kW (e.g. 2.5kW x4 or 5kW x2 cooling units). Discussed in Narrative, additional details expected at next stage such as schedules in TR's

65% - DS schedule shows 23MBH (or 7kW) unit for room 116A. 116A is a single rack and should be getting approx. 5kw unit. There appears to be a 19.1MBH unit available as shown for room 135 which might suffice for a one rack TR... unless observed conditions in 116A were unique and require above the prescribed units (in left column)

Bld3 room 135 is a 2 rack TR and should get a 24MBH unit to get approx. 7kw of cooling.

Rack mounted UPS Runtime. UPS runtime only required to have 10 min runtime

116A will be adjusted to be a 5kW unit for the next submission.

B3-135 will be upgraded to a 2.5-ton unit for the next submission. A load of 26.5 MBh was calculated for the space.

Those units have been removed.

Split Units shown in MCR. Split units shown in MCR/DC, is there a reason for this being installed

Lighting in TRs. Detail 6 shows improper alignment of lighting.

Should be parallel to front and rear of racks as is shown in most TRs

Rack UPS Runtimes. "Spaces with generator backup will be provided with 10 minutes worth of run-time while spaces without generator backup will be provided with 1-hour runtime in accordance with VA requirements."

The UPS were sized based off of 15 racks at 3.5kW with an additional 25% for future growth.

Additionally, UPS of this size are not recommended to be loaded to more than 80%. This calculation gave us a UPS size of 82kW and we went to the next standard size of 100kW.

The UPS were sized based off of 15 racks at 3.5kW with an additional 25% for future growth.

Additionally, UPS of this size are not recommended to be loaded to more than 80%. This calculation gave us a UPS size of 82kW and we went to the next standard size of 100kW.

UPS only require 10 minute of battery runtime when generator power is available.

Drawings to be updated at next submission

Drawings to be updated at next submission

Agreed, Narrative to be updated at next submission

Space/Power requirements in small TR. The space requirements for

TR 116A may just meet the very minimum space requirements (3ft clearance on 3 sides and 1 ft on the 4th side) however the traditional power distribution for this TR using a 30A Zone PDU will not work.

This setup will most likely require elimination of the zone PDU and use of 2 separate 20A circuits to each individual rack providing A/B power to the vertical PDU's. If this can be achieved please provide details and add to variance request.

65% - note 11 still indicates 30A feeding a Zone PDU. Single racks do not utilize a zone PDU. Single rack are fed by 2 L21-20 whips

UPS and distribution sizing is matched to the ultimate design capacity for the MCR. Use Telecommunication Design Philosophy as guide. Bldg 1, one liner shows 2 100kW UPS's backing up the MCR however, has the proper analysis been done on the existing MCR/DC to determine if this is appropriate. In addition has the predicted layout of the MCR in B1 Level 5 taken into account that this will be a new

MCR and it is expected to allow up to 5kW per standard density rack.

JSA and FDSS is also expected to be installed in the MCR and space and power/heat rejection for this equipment needs to be factored as well. Solution delivery details specs for Generic small and extra small

MCR's.

Additional details are expected at the next stage of design.

65% - one line still indicates each UPS at 100kW which seems excessive. Difficulty in finding what AE is tracking as the current lod on the DC to base with some future growth the proper sizing of the

UPS and CRACs

An ultimate design capacity for the MCR is planned 3.5kW per enclosure in legacy remodels such as the current OEHRM upgrades, typically 5kW per server cabinet in new facilities). Additional details are expected at the next stage of design

65% - CRACs sized at 49kW. At N+1 49kW seems more appropriate than the 100kW for each UPS unit. It is difficult to find where the AE is determining sizing of the CRACS and UPS.. they should be based on a similar load

17 HEFP

GS001

Narrative Telcom pg 5of6

T-series drawing such as T-106

(example)

TELECOM

18 HEFP

GS001

Narrative Telcom pg 5of6

T-series drawing such as T-106

(example)

TELECOM

19 HEFP T-302 TELECOM

20 HEFP TELECOM

21 HEFP T-302 TELECOM

Tanisha

Gordon

T-107 TELECOM

23 DCIE ARCH

24 DCIE ARCH

25 DCIE ELEC

26 DCIE ELEC

27 DCIE ELEC

Item 3 – The requirement is a minimum 8x10 space for non-healthcare and 10x10 space for healthcare. There are additional criteria based on how many passive work area outlets (WAOs) are to be supported in the serving zone; these numbers are found in the flowchart in the TR Design Checklist.

Rack Elevation. pending rack elevation drawing

Location for JSA/FDSS in Data Center. General layout of the DC

(server room) does not see to indicate future location of JSA/FDSS.

JSA can likely be consolidated into existing racks. Cerner will need space for Cerner provided 2 cabinets). JSA and FDSS will add an additional approx. 10kW

BLDG 24 2nd floor Redundant paths not shown

Riser Diagram will be shown on next submission.

Will be shown at next submission

Typical Rack elevations shown on Telecom Details sheet T-401.

Item 18 – Power to the data center cannot be provided from normal branch; the data center will not meet the Rating 3 requirements. This is a no-go from DCIE’s perspective.

Item 19 – VA’s requirements are for 10 minutes of UPS runtime.

There is no VA requirement for 1 hour of runtime if there are no generators. If there are no generators, the facility is not mission critical and if it goes offline, so be it.

In MCRs, structured cabling systems are specified. Are cable tray or ladder racks shown?

Corrected in Narrative OM4/OS1 ISP, OS2 OSP.

Milestone Deliverables: DCIE is working with VA CFM to have an update published to the TIL specifying what types of drawings and other deliverables should be provided at each stage of design development for telecommunications space projects; below are additional items that we would like to see (where applicable based on the scope of the effort) in future milestone submittals.

Item 17 – This is listed as a DCIE comment, but it isn’t. Ultimate design capacity is based on the summation of the capacities for all of the IT equipment enclosures in a design, and is not a straight

5kW/enclosure; it also is not a straight 3.5kW/enclosure, which is the maximum that can be supported by a legacy facility using raised floor underfloor cooling distribution. See the attached CFD Model Criteria document.

Will adjust MCR to reflect.

Printing error on that sheet, we will reprint and send for review.

Need further clarification. Items have been added to checklist that were not in original checklist not required as part of OIT Design Manual. This would require a MOD from the CO and additional services to be able to provide this information

B1 160 (9'10" x 10')

B1 116A (6'10" x 14'1")

B3 201 (8'-0" x 10'-0") meets 3/3/3/1 rule

B9 107 (9'3" x 13'-11")

B11 102 (5'-8" x 9'-2") TE Location

B12 202 (9'-11" x 12'-0")

Agree

Drawings to be updated.

Drawings to be updated.

Multi-mode fiber for use within buildings is specified as OM4

(includes single-mode fiber OS1 as a hybrid cable). Single-mode for use between buildings is specified as OS2 (Inside of Plant (ISP)/

Outside Plant (OSP))Not detailed in Narrative or Drawings

Please be advised that buildings that are directly connected via hallways are considered inside plant and should have hybrid MM/SM fiber if they are directly connected to the building with the MCR/DC.

65% - Narrative indicates understanding of ISP and OSP fiber needs.

(note OS2 is for OSP, not OS1/2). Need a fiber riser diagram of confirm on drawings for counts, redundancy and geo diversity of paths. Telcom drawings such as T-106 do show correct fiber types and geo diversity. It is still advisable to have a single sheet riser diagram showing fiber runs to all TRs in a home run manner

Backbone riser diagrams indicate diverse (A/B) pathways from the

MDAs to each TR. Plan views show cable tray for backbone leaving

MCR on multiple paths. Backbone fiber counts are 24MM/12SM per path for same building, 24SM for outbuildings. TRs are individually fed from the MDAs (Main Distribution Area) on the diverse pathways; no daisy-chains or cross-connects. Not detailed in

Narrative or Drawings

Buildings that are directly connected via hallways are considered inside plant and it is possible that backbone fiber path diversity can be achieved using the hallways.

65% - Narrative indicates understanding of ISP and OSP fiber needs.

(note OS2 is for OSP, not OS1/2). Need a fiber riser diagram of confirm on drawings for counts, redundancy and geo diversity of paths. Telcom drawings such as T-106 do show correct fiber types and geo diversity. It is still advisable to have a single sheet riser diagram showing fiber runs to all TRs in a home run manner

28 DCIE TELECOM

29 DCIE

Mechanical

Narrative p2/4.

MECH

30 DCIE

Mechanical

Narrative p3/4

MECH

31 DCIE

Mechanical

Narrative p4/4

MECH

32 DCIE

Structural

Narrative.

STRUCT

33 DCIE

Architectural

Narrative p4/4

ARCH

34 DCIE ARCH

35 DCIE

Electrical

Narrative p1/4

ELEC

36 DCIE

Electrical

Narrative p2/3.

ELEC

37 DCIE

Electrical

Narrative p3.

ELEC

38 DCIE ELEC

39 DCIE

Telecom

Narrative p2

TELECOM

40 DCIE Sheet M-601 MECH

41 DCIE Sheet M-701 MECH

42 DCIE Sheet E-402 ELEC

43 DCIE Sheet E-403 ELEC

Concur. Controls section used language specific to TRs. Will need to confirm current ECC with

VA piror to updating language and controls information on drawings.

Concur. Model DS070 with will be used in the next submission.

Concur. Controls to be expanded upon in the next submission.

Station performed Structural analysis of 5th floor and it meets all requirements.

Yes, Variances have been submitted for every TR room on site.

RFI 001- Existing Doors are 7'-0"- Existing ceiling heights and existing equipment in ceiling do not allow to incread door heights to 8'-0"

RFI 002- Positive Pressure Requirements- There are a few reasons why pressurizing these telecommunications rooms does not seem intuitive or worth the effort it would require.

Outside of a new build where VAV systems can be put in place to also account for single TR rooms and pressures with redundant boxes. We’ve reduced primarily to mini-split units within each TR.

Controls for the data center CRAC unit operation need to be expanded significantly to allow the GC to procure and install the proper equipment. See attached Data Center CRAC Unit Operation Vision guidance.

Detail 4 – for a single-rack TR the power should be dual L21-20, not

L21-30 as shown. The L21-30 circuits feed a 30A Zone PDU, which is used to support (2) racks. With only a single rack, the Zone PDU is not needed.

Lighting is to be located in front of and in rear of network channel racks to maximize visibility for technicians working in the equipment.

DCIE recommends removing the column “Area Served.” TRs may support serving zones exceeding 10,000sf without a variance.

Please see guidance in attached for CRAC unit operation. The narrative is light on details, potentially indicating that the A/E is unaware of the type of control system that is being sought.

TEs are generally not provided with additional cooling. They are intended to use whatever cooling is available in the space, unless the environmental conditions are outside of those specified for TRs.

The variance schedule indicates that the project will seek a variance for every single telecommunications space in the project. This is not acceptable as it generally indicates that insufficient due diligence in finding appropriate spaces has been accomplished.

Floor loading capacity of telecommunication equipment rooms shall be sufficient to bear both the distributed and concentrated load of installed equipment. EIA/TIA Standard 569 prescribes a minimum live load capacity for distributed loads of 12.0 kPA (250 pounds per square foot) and a minimum concentrated live load of 4.5 kN (1,000 pounds) over the area of greatest stress to be specified. The fifth floor computer room plan is not acceptable for this reason.

Narrative to be updated.

Narrative to be updated.

Narrative to be updated.

Drawings to be updated.

Concur - Added to Narrative and Plans

Concur. Language updated to reflect that TEs generally do not receive additional cooling.

Concur. Language has been updated to specify downflow floor stand units.

UPS battery runtime requirements are 10 minutes. There is no requirement for 1 hour of runtime when there is not a generator. If a building does not have a generator, it is not mission critical, and therefore if the power goes out it is not a problem. Keeping a switch running when all of the end-user devices are without power is pointless.

The A/E does not appear to have a correct concept of the structured cabling system internal to the computer room. The language in section “Description of work to be performed SR/MCR/DC” does not make sense to the reviewer. (A TR function may be present in the

MCR, as currently indicated, and should be placed in one of the MDA racks.)

CRAC schedule calls out 50kW units, indicating the planned size of the data center is smaller than 50kW ultimate design load. Note that the model number shown is for an outdoor condensing unit, not an in-room CRAC.

Item 25 – Not a DCIE comment, but campus fiber backbone is to be field terminated (fusion spliced) on both ends. Pre-terminated fiber is only used in the MCR-internal structured cabling system.

Zone PDUs are only used in TRs with more than a single rack. The 1-rack TR may be present in a non-healthcare setting at this facility.

Both sources of power for a Rating 3 data center are required to be generator-backed. Providing normal power for one leg in the computer room is not acceptable as it does not meet the requirements of TIA-942 Rating 3. See sample one-line graphic below for guidance.

VRF and wall-mounted systems are not authorized for the data center.

It is not necessary to conduct a load analysis on the TRs. Racks in the

TRs (and their outfitting) will be based on the VA’s standard design without regard to current loading.

Service area is in same section as TR room size requirements. Is their a document as to what requirements need a variance to change and which do not?

Drawings to be updated at next submission

Drawings to be updated at next submission

Can discuss further in meeting

44 DCIE Sheet AE-104 ARCH

45 DCIE ARCH

46 DCIE Sheet M-402 MECH

47 DCIE Sheet E-404 TELECOM

48 DCIE MECH

49 DCIE Sheet E-601 ELEC

Concur. The design intent was to have one unit run at a time considering there is only one cold aisle in the current configuration and each unit can cool the space individually.

Alternatively, both telcom racks could be rotated to where the face outward and the CRAC units could be staggered. However, this option was considered not optimal in a failure mode because if one CRAC unit fails, an enitre row of racks would not receive cooling.

Concur. Model DS070 with will be used in the next submission.

Can discuss further in meeting with VA

Mechanical support for the data center only shows (2) CRAC units;

therefore, the design is assumed to want to flood the space with cooling air and not separate the airstreams. This bulk force approach will work for lower loading levels in the computer room, but it will not be able to support loading levels approaching half or more of ultimate design load because of mixing of supply and return air. This is an inefficient approach that is not supported by VA standards. All data center heat rejection approaches will require some manner of containment to separate the air streams so that the 20°F ΔT design condition can be achieved.

Layout of IT equipment enclosures in the proposed 5th floor computer room will not work. The available space is simply insufficient to support the telecommunications function requirements. For example, the bottom row has 2 enclosures for each MDA, but the server row is not supported by HDAs. The top row has HDAs supporting (3) server cabinets (where they can support up to 12); this is a very inefficient design. DCIE does not see any manner in which to use the allocated space and form factor to modernize the data center for the next 20 year lifecycle supporting the station.

New data center needs to have both A and B feeds from generator sources. Reviewer notes that building 1 plan is not going to work and so does not make more specific recommendations for sourcing.

Note that the ultimate design load of the design as shown is approximately 60kW. The mechanical systems do not support this level of design load.

The facility is not set up with 2N generation. A/E can add additional equipment to the system, but this will still introduce a single point of failure similar to the current design.

The allocated physical space and form factor will not support the requirements of a Rating 3 data center.

No elevation information for the proposed 5th floor computer room has been provided. As noted in previous design review, a minimum of

12’-0” of clear height is required to accept the necessary overhead infrastructure, and this is unlikely to be found in this space. This makes the proposed space unsuitable for use as a Rating 3 data center.

RCP submitted as part of 65% drawings show ceiling height of 11'-2". No existing Building on campus would meet the 16'-0" slab to deck requirement.

Please clarify. All clearances are met for equipment in the proposed MCR.