36C24225R0044 0001 - Amendment No.1 - RFI and Questions.pdf

5. PROJECT NUMBER (if applicable)

CODE7. ADMINISTERED BY

2. AMENDMENT/MODIFICATION NUMBER

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6. ISSUED BY

8. NAME AND ADDRESS OF CONTRACTOR

4. REQUISITION/PURCHASE REQ. NUMBER3. EFFECTIVE DATE

9A. AMENDMENT OF SOLICITATION NUMBER

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PAGE OF PAGES

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

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BPA NO. 1. CONTRACT ID CODE

FACILITY CODECODE

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

E. IMPORTANT:

is extended,

(a) By completing Items 8 and 15, and returning __________ copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY is not extended.

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is required to sign this document and return ___________ copies to the issuing office.is not, A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. IN ITEM 10A.

15C. DATE SIGNED

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER

Contractor

16C. DATE SIGNED

14. DESCRIPTION OF AMENDMENT/MODIFICATION

16B. UNITED STATES OF AMERICA

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER 16A. NAME AND TITLE OF CONTRACTING OFFICER

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Prescribed by GSA - FAR (48 CFR) 53.243

(Type or print) (Type or print)

(Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

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(SEE ITEM 11)

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ONE

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

(Signature of person authorized to sign) (Signature of Contracting Officer)

0001 04-29-2025 632-15-101

36C242

Department of Veterans Affairs Network Contracting Office 2 James J. Peters VA Medical Center 130 West Kingsbridge Road Bronx NY 10468-3904

36C242

Department of Veterans Affairs James J. Peters VA Medical Center Network Contracting Office 2 130 West Kingsbridge Road Bronx NY 10468-3904

To all Offerors/Bidders

36C24225R0044

04-03-2025

X

X X x 1

Request for Proposal (RFP) #36C24225R0044; Amendment #1 Replace Primary Electrical Distribution at Northport.

The purpose of Amendment #1 is to provide responses to Request for Information (RFI) and Questions. This amendment also seeks to replace the Specifications document published as part the initial solicitation.

Please see the following additional documents for reference: (1) Certified Relay Test Report (2) ATI NPVA Certificate

(3) NP Sequence of Operation - Purge Addition (4) NVMA Center - CESIR Report (5) OI Northport (6) Site Visit Atten-dance Sign in Sheet (7) Post Installation Certification (8) Protection and Controls Test Plan

________________ PLEASE SEE CONTINUATION SHEET FOR MORE DETAILS _____________

REQUEST FOR INFORMATION RESPONSES

1. Who is responsible for the CHP interconnection Application since it’s a new/replacement service?

R. The facility currently has a CHP interconnection agreement in place with the utility and the CHP system is currently operating intermittently. If a new CHP interconnection application is required because the existing equipment is being replaced or modified, that application and its administration with the Utility would be the responsibility of the VA (not the ESPC contractor) & potentially the designer of record for the new Primary Switchgear project.

2. A copy of all available existing installation’s Interconnection documentation on the CHP: • Single-line

• Three-line

• DC Diagrams

• Interconnect type (Tariff) / Appendix C

• CESIR Study Report

• The Final as left / tested Relay settings

• Final PSEG close out documents

R. For requested diagrams see reference As-Built documents included at the end of the design package. See attachments for supplemental documents requested.

3. Please confirm where the CHP relay is located.

R. In the ESPC installed primary switchgear building down by the roadside.

4. On the Scope of Work - compliance page #6, please confirm a site walk through was mandatory for bidders?

R. Site Visit / walkthrough is not mandatory.

5. Drawings ES100 & ES101 legend states “Existing duct bank to be abandoned with existing electrical feeders removed. Provide new pull wire in abandoned duct bank sections”

R. There is no question on this item. Please follow the contract document.

6. Please confirm existing duct bank that will remain in place is not a conflict with new concrete encased feeders A, B, C, D & E routing?

R. The existing ductbanks to be abandoned will have feeders removed and new pull wires installed, as shown on the drawings. New electrical and communication ductbanks will generally run parallel to existing lines, but at locations shown on ES200, ES201, and ES202, new ductbanks will cross below existing ductbanks, maintaining a minimum 12" vertical separation.

Crossings must use smooth bends (30° or maximum 45° angles) for elevation transitions.

The existing ductbank locations are shown on civil document based on an available reference record and Quality Level B survey (ASCE 38-22). The contractor must field verify all existing utilities, coordinate with civil survey data, and perform an 811 call prior to excavation, as required by law.

7. Please confirm abandoned feeders will be removed offsite by the EC.

R. All demolished materials, including abandoned wiring and cables shall be properly disposed by contractor. Please coordinate with owner if certain equipment and materials shall be saved, cleaned and turned back to owner.

8. Is electrical equipment expected to be provided by electrical contractor?

R. There is no equipment pre-purchased by the VA. All labor and material shall be sole responsibility of the contractor as noted on the design documentation.

9. Who is the fire alarm vendor?

R. Casey Fire Systems Inc.

___________END OF RFIs____________

HYDRONIC HEATING SYSTEM SEQUENCE OF OPERATIONS.

1. HEAT SHALL BE DELIVERED TO THREE SEPARATE SYSTEMS UPON AVAILABILITY

FROM THE GENERATOR OPERATION. THESE THREE SYSTEMS INCLUDE: A) THE

CONDENSATE PREHEAT LOOP; B) THE B92 HYDRONIC HEATING LOOP; AND C) THE

B92 DOMESTIC HOT WATER SYSTEM. SUFFICIENT HEAT CAPACITY EXISTS TO

SERVE ALL THREE LOADS SIMULTANEOUSLY. EXCESS HEAT NOT UTILIZED BY

THREE HEAT RECOVERY SYSTEMS WLL BE AUTOMATICALLY REJECTED THROUGH

THE 2G HEAT REJECTION SYSTEM.

2. 2G ONLY:

2.1. WHEN NAUTILOUS (2G PACKAGE SIDE) RECEIVES AN ENGINE RUN STATUS

FROM 2G CONFIRMING THAT THE ENGINE IS ONLINE, AND A 10-MINUTE

ADJUSTABLE TIME DELAY HAS EXPIRED TO ALLOW THE SYSTEM TO WARM-UP,

THE NAUTILOUS CONTROLS WILL ENABLE PUMPS P18.07/P18.08 (B92) AND

P18.03/P18.04 (CONDENSATE PREHEAT) TO OPERATE (On the 2G side). 2G WILL

CONTROL THE SPEED OF THE PUMPS BASED ON THE 2G SEQUENCE.

2.2. 2G WILL CONTROL EQUALIZED RUNTIME OF THE PUMPS.

3. BUILDING 203: PUMPS 18.03 AND 18.04 SHALL RAMP ON AND CV 18.04 (LOCKED

OPEN) SHALL CIRCULATE HOT WATER TO THE CONDENSATE PREHEAT LOOP. CV

18.04 IS A MIXING 3 WAY. THIS SYSTEM WILL BE LOCKED OPEN FOR NORMAL

OPERATION. THIS SYSTEM WILL HAVE THE CAPABILITY TO COME ONLINE AS

SOON AS THE CONDENSATE PREHEAT PUMPS ARE ACTIVATED ON THE 2G SIDE

AND MAINTAIN THE TEMPERATURE OF THE CONDENSATE TO THE HEAT

EXCHANGER IF NECESSARY. THE SYSTEM SHALL BE BALANCED WITH THE VFD

TO FLOW APROXIMATELY 146GPM TO MATHCH THE CAPACITY OF THE EXISTING

CONDENSATE PUMPS.

4. BUILDING 92 SYSTEM ENABLE/DISABLE:

4.1. SYSTEM ENABLE: THE BUILDING 92 CONTROLS WILL MONITOR BUILDING 92

LOOP TEMPERATURE. WHEN THE SUPPLY TEMPERATURE IS GREATER THAN

150 DEG F FOR 5 (ADJ) MINUTES, THE BUILDING 92 CONTROLS WILL BE

ENABLED TO ALLOW CV-4 TO ALLOW FLOW IN ACCORDANCE WITH SECTION

5B AND TO ENABLE CV-5 TO MODULATE IN ACCORDANCE WITH SECTION 6A.

4.2. SYSTEM DISABLE: WHEN THE SUPPLY TEMPERATURE IS LESS THAN 140 DEG F

FOR 5 (ADJ) MINUTES, THE BUILDING 92 CONTROLS WILL BE DISABLED.

5. BUILDING 92 HOT WATER HEATING CONTROL:

5.1. CV-06 WILL REMAIN LOCKED OPEN ALL THE TIME AND NOT MODULATE.

5.2. WHEN ENABLED, NAUTILUS WILL MODULATE DIVERTING VALVE CV-04 FROM

CLOSED TO OPEN TO ALLOW THE RETURN HEATING HOTWATER TO FLOW

THROUGH THE 2G HEATEXCHANGER.

5.3. WHEN DISABLED, NAUTILUS WILL MODULATE DIVERTING VALVE CV-04 TO

CLOSED.

6. BUILDING 92 DOMESTIC HOTWATER CONTROL:

6.1. WHEN ENABLED, NAUTILUS WILL MODULATE CV-05 TO CONTROL TO THE

LEAVING HOTWATER SETPOINT OF HRHX-1 NOT TO EXCEED 150F.

6.2. WHEN DISABLED, CV-05 SHALL REMAIN CLOSED.

6.3. PUMP/VALVE CONTROL (DCWP-1): WITH THE SYSTEM ENABLED, NAUTILOUS

SHALL START DOMESTIC HW CIRCULATING PUMP DCWP-1, AND OPEN

DIVERTING VALVES CV-1 AND CV-2 TO ALLOW FLOW THROUGH HRHX-1.

WHEN DISABLED THE PUMP WILL BE COMMANDED OFF AND CV-1 AND CV-2

SHALL BE MODULATED TO BYPASS HRHX- 1.

6.4. VALVES CV-8 AND CV-3 WILL BE OPEN ANYTIME THE THIS SYSTEM IS

ENABLED. WHEN THE SYSTEM IS DISABLED THEY WILL BE CLOSED.

6.5. THE EMCS SHALL MONITOR THE STATUS OF THE DOMESTIC HOT WATER

HEATERS. IF NEITHER HOT WATER HEATER HAS CALLED FOR HEAT FOR 2

(ADJ) MINUTES, DCWP-1 SHALL BE DISABLED UNTIL THE IS A CALL FOR HEAT.

(temporary note: If there is a DP installed as indicated on the drawings, this could be used in place of the statuses to disable the DCWP-1)

SEQUENCE OF OPERATIONS ‐ STEAM AND POWER GENERATION

1. MODES OF OPERATION. THERE ARE TWO MODES OF OPERATION OF THE CHP

SYSTEM:

1.1. STEAM AND POWER GENERATION ‐ BOTH 2 MW GENERATOR AND HEAT

RECOVERY STEAM GENERATOR (HRSG) ARE ONLINE. ONE OF THE EXISTING

STEAM BOILERS IS ONLINE TO PROVIDE ADDITIONAL STEAM GENERATION

CAPACITY TO MEET STEAM DEMAND.

1.2. POWER GENERATION ONLY ‐ 2 MW GENERATOR IS ONLINE; HRSG IS OFFLINE

AND BYPASSED FOR MAINTENANCE OR REPAIRS. THE EXISTING BOILER(S)

ARE ONLINE TO PROVIDE STEAM GENERATION CAPACITY TO MEET THE

STEAM DEMAND.

2. STEAM AND POWER GENERATION START‐UP SEQUENCE OF OPERATIONS

2.1.1. Upon request for startup of the CHP from the central control system, a permissive signal will be sent to the CHP control panel initiating a start of the purge cycle.

2.1.2. Once the purge cycle is initiated, the Exhaust Purge Valve will be commanded to open.

2.1.3. Once the Exhaust Purge Valve is verified to be open, the Purge Fan will be commanded to start and operate at 60 Hz (ADJ).

2.1.4. The CHP controls will send a Purge command to the HRSG controls, changing the diverter valve to the full bypass position and activating a 225 sec (ADJ) time delay.

2.1.5. After the 225 sec (ADJ) time delay has expired, the divertor valve will change from the full bypass position to full open to the HRSG, and activate a 150 sec (ADJ) time delay.

2.1.6. After the 150 sec (ADJ) time delay has expired, the divertor valve will change from full open to the HRSG position to the full Bypass position.

2.1.7. Once the divertor valve returns to the full bypass position, the Purge Valve will close and the Purge Fan will continue to operate at XX Hz (ADJ – To be determined during start-up and Cx) during engine operation to sustain a slight positive pressure on the purge valve to maintain a positive seal and keep the valve assembly cool.

2.1.8. Once the purge valve is verified to be closed, the CHP PLC shall send a start command to the engine.

2.1.9. Upon engine shutdown the Purge valve will open.

2.1.10. The purge fan will operate for XX sec (ADJ – to be determined during start-up and Cx) with the bypass valve fully open to the HRSG.

2.1.11. After XX sec (ADJ – to be determined during start-up and Cx) the purge fan will shut down and the purge valve will close.

2.1.12. If the Purge valve is not in a closed position during CHP operation, the

CHP will be locked out and an alarm will be issued.

2.2. THE CHP CONTROLS SHALL VERIFY NATURAL GAS (NG) PRESSURE IS

AVAILABLE, START THE LUBE OIL PUMPS, START THE JACKET WATER PUMPS

AND RADIATOR, AND START THE AFTERCOOLER WATER PUMPS AND

RADIATOR

2.3. THE GENERATOR CIRCUIT BREAKER “MG” WILL BE CHECKED TO BE IN OPEN

STATE (aux contacts in gen breaker to provide status).

2.4. THE HRSG FLUE GAS BYPASS DAMPER WILL BE VERIFIED BY LIMIT SWITCH TO

BE IN FULL BYPASS POSITION (OR THE CLOSED POSITION), WHICH MEANS

THAT NO FLUE GASES ARE ABLE TO PASS THROUGH THE HRSG TO

GENERATE STEAM. THE HRSG FLUE GAS BYPASS DAMPER SHALL ONLY BE

CHANGED FROM BYPASS (OR CLOSED) TO THE OPEN POSITION THROUGH

MANUAL MEANS ONCE THE FOLLOWING SEQUENCES ARE VERIFIED BY A

PLANT OPERATOR.AUTOMATIC STEAM GENERATION IS PROHIBITED.

2.5. THE CHP CONTROL PANEL WILL INSTRUCT THE COMBUSTION AIR DAMPERS

TO OPEN. WHEN END SWITCH SENSORS PROVE THAT THE DAMPERS ARE

OPEN THE COMBUSTION AIR FANS WILL START.

2.6. IF NO FAULTS ARE DETECTED, THE CHP CONTROL PANEL WILL INITIATE THE

ICE STARTER

2.7. ONCE ICE ACHIEVES STABLE RPM, THE CHP CONTROL PANEL WILL INITIATE

THE GENERATOR START UP.

2.8. AFTER THE GENERATOR IS ONLINE, THE CHP CONTROLS WILL INITIATE THE

STARTUP OF THE HRSG. THIS WILL BE INITIATED VIA MANUAL CONTROL‐IT

SHALL NOT OCCUR AUTOMATICALLY. A BOILER PLANT OPERATOR WILL

PHYSICALLY PRESS EITHER A MECHANICAL OR DIGITAL BUTTON TO INITIATE

THE FOLLOWING SEQUENCE

2.9. WHEN STABLE OPERATION IS REACHED, GENERATOR CONTROLS SHALL

PROVE THAT OUTPUT MATCHES THAT OF THE PULASKI FEEDER. AS A MATTER

OF CLARIFICATION WITH RESPECT TO THE “STATE OF THE PULASKI FEEDER”

AS NOTED IN IV.8 ABOVE, THE FOLLOWING CRITERIA MUST BE MET AND

MAINTAINED THROUGHOUT OPERATION.

2.9.1. UTILITY FEEDERS ELWOOD & PULASKI ARE REQUIRED

(BREAKERS CLOSED) WITH TIE BREAKER OPEN.

2.9.2. THE GENERATOR WILL ONLY PARALLEL WITH THE UTILITY

PULASKI FEEDER.

2.9.3. UTILITY FEEDERS PULASKI & ELWOOD WILL NEVER PARALLEL.

2.9.4. A SINGLE UTILITY FEEDER, EITHER PULASKI OR ELWOOD, DOES

NOT HAVE THE CAPACITY TO SUPPORT THE ENTIRE SITE.

2.9.5. SITE GENERATING POWER WILL NOT BE EXPORTED TO THE

UTILITY GRID. (PULASKI FEEDER IS EQUIPPED WITH DIRECTIONAL

POWER AND DIRECTIONAL OVERCURRENT RELAYS ‐ WHEN RELAYS ARE

ACTIVATED, GENERATOR BREAKER WILL AUTOMATICALLY OPEN).

(Reverse power settings need to be determined)

2.9.6. THE UTILITY WILL SUPPORT THE SITE WITH 0.1MW AS A MINIMUM

(VIA PULASKI FEEDER) UNDER ANY ELECTRICAL SCENARIO EXCEPT FOR

LOSS OF PULASKI FEEDER.

2.9.7. THE MAIN & TIE BREAKERS WILL EITHER OPEN OR CLOSE

MANUALLY.

2.9.8. ANYTIME WHERE POWER IS LOST, EACH SOLAR INVERTER WILL

SHUT DOWN INDEPENDENTLY. WHEN POWER IS SENSED EXTERNALLY

AT THE INVERTER, SOLAR SYSTEM WILL ENTER 5 MINUTE LONG

START‐UP ROUTINE TO VERIFY THAT POWER IS STABLE. FOUR(4) KW OF

POWER EXTERNALLY AND INTERNALLY MUST BE SENSED BY

INVERTERS BEFORE INVERTER WILL BEGIN 5 MINUTE RE‐START

SEQUENCE. AT END OF 5 MIN SEQUENCE, THAT POWER MUST NOT

WAIVER OR ELSE INVERTER MOVES INTO MANUAL DEFAULT AND

REQUIRES A MANUAL RE‐START.

2.9.9. IF NO FAULTS WITH GENERATOR OPERATION ARE DETECTED,

THE CHP CONTROL PANEL WILL CLOSE THE MAIN GENERATOR

BREAKER “MG” ALLOWING THE GENERATOR TO PROVIDE POWER TO

THE SITE.

2.9.10. AFTER THE GENERATOR IS ONLINE, THE CHP CONTROLS WILL

INITIATE THE STARTUP OF THE HRSG. THIS WILL BE INITIATED VIA

MANUAL CONTROL‐IT SHALL NOT OCCUR AUTOMATICALLY. A BOILER

PLANT OPERATOR WILL PHYSICALLY PRESS EITHER A MECHANICAL OR

DIGITAL BUTTON TO INITIATE THE FOLLOWING SEQUENCE.

2.9.11. THE EXISTING FEED WATER PUMP STATUS SHALL BE PROVEN AS

RUNNING, AND THE HRSG FEED WATER ISOLATION VALVE SHALL OPEN,

AND BE PROVEN VIA OPEN POSITION LIMIT SWITCH. THE FEED WATER

CONTROL VALVE SHALL BE IN AUTOMATIC TO CONTROL THE WATER

LEVEL IN THE HRSG.

2.9.12. THE BOILER OUTLET STOP MOTOR OPERATED VALVE SHALL

OPEN, AND BE PROVEN VIA OPEN POSITION LIMIT SWITCH.

2.9.13. THE FLUE GAS BY‐PASS DAMPER SHALL MODULATE FROM FULL

BY‐PASS POSITION TO INTERMEDIATE POSITION TO START PASSING

FLUE GAS THROUGH THE HRSG. THIS SHALL COMMENCE FROM A

MANUAL SIGNAL FROM THE PLANT OPERATOR.

2.9.14. WHEN HRSG STEAM PRESSURE MATCHES THE PLANT HEADER

PRESSURE, THE HRSG OUTLET NON-RETURN VALVE WILL OPEN AND

STEAM WILL FLOW TO THE HEADER.

2.9.15. THE FLUE GAS BY‐PASS DAMPER SHALL CONTINUE TO

MODULATE UNTIL FULLY OPENED AND FULL HRSG STEAM PRODUCTION

IS REACHED.

3. STEAM AND POWER GENERATION STEADY OPERATION SEQUENCE OF

OPERATIONS.

3.1. THE 2 MW GENERATOR CONTROLS WILL MONITOR OUTPUT AND MODULATE

THE ICE LOADING ACCORDINGLY

3.2. ONCE ICE OPTIMUM OPERATING TEMPERATURE IS REACHED, CHP CONTROLS

WILL INITIATE THE HEAT RECOVERY LOOPS THAT ARE PART OF THE JACKET

WATER COOLING SYSTEM THAT SERVE BUILDING 92

3.3. THE EXISTING BOILER(S) ARE ALWAYS ASSIGNED HEADER PRESSURE

CONTROL. ONCE THE HRSG IS BROUGHT ONLINE AND IS PROVIDING STEAM

FLOW, THE EXISTING BOILER FIRING RATE WILL MODULATE AS REQUIRED TO

MAINTAIN PLANT HEADER PRESSURE AT SETPOINT.

3.4. IF MAXIMUM HRSG OUTPUT IS REACHED AND THE STEAM HEADER PRESSURE

CONTINUES TO DROP, THEN THE EXISTING PLANT OPERATING BOILER WILL

COMPENSATE BY INCREASING ITS OUTPUT

3.5. IF STEAM HEADER PRESSURE RISES ABOVE SETPOINT, THE EXISTING BOILER

PLANT OPERATING BOILER SHALL UNLOAD TO MINIMUM POINT, AFTER THAT IF

HEADER PRESSURE IS STILL HIGH THE HRSG WILL MODULATE ITS OUTPUT BY

ADJUSTING THE FLUE GAS BY‐PASS DAMPER POSITION TO DIRECT MORE

FLUE GAS THROUGH THE BYPASS AND THUS MAINTAIN HEADER PRESSURE

AT SETPOINT.

3.6. UNDER STEADY NORMAL OPERATION, THE PRIMARY UTILITY FEEDERS

PULASKI & ELWOOD ARE AVAILABLE. PULASKI & ELWOOD MAIN BREAKERS

ARE CLOSED AND TIE BREAKER IS OPEN. THE GENERATOR WILL SYNCH WITH

PULASKI FEEDER AND CLOSE GENERATOR BREAKER. THIS CONFIGURATION

WILL PROVIDE POWER FOR THE ENTIRE SITE.

4. POWER GENERATION ONLY ‐ HRSG IS OFFLINE (EXISTING BOILER PLANT

OPERATIONAL)‐ STARTUP SEQUENCE OF OPERATIONS

4.1.1. Upon request for startup of the CHP from the central control system, a permissive signal will be sent to the CHP control panel initiating a start of the purge cycle. Once the purge cycle is initiated, the Exhaust Purge Valve will be commanded to open.

4.1.2. Once the Exhaust Purge Valve is verified to be open, the Purge Fan will be commanded to start and operate at 60 Hz (ADJ).

4.1.3. The CHP controls will send a Purge command to the HRSG controls, changing the diverter valve to the full bypass position and activating a 225 sec (ADJ) time delay.

4.1.4. After the 225 sec (ADJ) time delay has expired, the divertor valve will change from the full bypass position to full open to the HRSG and activate a 150 sec (ADJ) time delay.

4.1.5. After the 150 sec (ADJ) time delay has expired, the divertor valve will change from full open to the HRSG position to the full Bypass position.

4.1.6. Once the divertor valve returns to the full bypass position, the Purge Valve will close and the Purge Fan will continue to operate at XX Hz (ADJ – To be determined during start-up and Cx) during engine operation to sustain a slight positive pressure on the purge valve to maintain a positive seal and keep the valve assembly cool.

4.1.7. Once the purge valve is verified to be closed, the CHP PLC shall send a start command to the engine.

4.1.8. Upon engine shutdown the Purge valve will open.

4.1.9. The purge fan will operate for XX sec (ADJ – to be determined during start-up and Cx) with the bypass valve fully open to the HRSG.

4.1.10. After XX sec (ADJ – to be determined during start-up and Cx) the purge fan will shut down and the purge valve will close.

4.1.11. If the Purge valve is not in a closed position during CHP operation, the

CHP will be locked out and an alarm will be issued.

4.2. CHP CONTROLS SHALL VERIFY NG PRESSURE IS AVAILABLE, START THE LUBE

OIL PUMPS, START THE JACKET WATER PUMPS AND RADIATOR, AND START

THE AFTERCOOLER WATER PUMPS AND RADIATOR

4.3. GENERATOR CIRCUIT BREAKER MG WILL BE CHECKED TO BE IN OPEN STATE

4.4. HRSG FLUE BYPASS DAMPER WILL BE VERIFIED BY LIMIT SWITCH TO BE IN

FULL BYPASS POSITION

4.5. CHP CONTROL PANEL WILL INSTRUCT THE COMBUSTION AIR DAMPERS TO

OPEN. WHEN END SWITCH SENSORS PROVE THAT THE DAMPERS ARE OPEN

THE COMBUSTION AIR FANS WILL START.

4.6. IF NO FAULTS ARE DETECTED, THE CHP CONTROL PANEL WILL INITIATE THE

ICE STARTER

4.7. ONCE ICE ACHIEVES STABLE RPM, THE CHP CONTROL PANEL WILL INITIATE

THE GENERATOR START UP

4.8. GENERATOR CONTROLS WILL VERIFY THE STATE OF PULASKI FEEDER, IF THE

PULASKI FEEDER BREAKER IS CLOSED, THE GENERATOR CONTROLS WILL

OBTAIN DATA TO SYNC THE GENERATOR TO THE UTILITY.

4.9. WHEN STABLE OPERATION IS REACHED, GENERATOR CONTROLS SHALL

PROVE THAT OUTPUT MATCHES THAT OF THE PULASKI FEEDER. NOTE THAT

THE SAME CONDITIONS APPLY AS LISTED IN III.9.A‐I ABOVE WITH RESPECT TO

THE STATE OF THE PULASKI FEEDER.

4.10. IF NO FAULTS WITH GENERATOR OPERATION ARE DETECTED, THE CHP

CONTROL PANEL WILL CLOSE THE MAIN GENERATOR BREAKER MG TO

PROVIDE POWER TO THE SITE.

5. POWER GENERATION ONLY ‐ HRSG IS OFFLINE (EXISTING BOILER PLANT

OPERATIONAL)‐ STEADY OPERATION SEQUENCE OF OPERATIONS

5.1. THE 2 MW GENERATOR CONTROLS WILL MONITOR OUTPUT AND MODULATE

THE ICE LOADING ACCORDINGLY

5.2. THE EXISTING BOILER PLANT OPERATING BOILER(S) WILL MODULATE TO

MAINTAIN STEAM HEADER SET PRESSURE

5.3. THE HRSG REMAINS OFFLINE WITH THE BYPASS DAMPER FULL CLOSED

ALLOWING ALL FLUE GASES TO BE EXHAUSTED TO THE SURROUNDINGS

5.4. UNDER STEADY NORMAL OPERATION, THE PRIMARY UTILITY FEEDERS

PULASKI & ELWOOD ARE AVAILABLE. PULASKI & ELWOOD MAIN BREAKERS

ARE CLOSED AND TIE BREAKER IS OPEN. THE GENERATOR WILL SYNCH WITH

PULASKI FEEDER AND CLOSE GENERATOR BREAKER. THIS CONFIGURATION

WILL PROVIDE POWER FOR THE ENTIRE SITE.

6. STEAM AND POWER GENERATION FAULT CONDITION #1‐ THE 2 MW GENERATOR

ENCOUNTERS A FAULT AND SHUTS DOWN

6.1. THE MG BREAKER WILL OPEN AND THE CHP GENERATOR WILL SHUT DOWN.

THE PULASKI FEEDER WILL SUPPORT ALL THE LOADS ON THE PULASKI SIDE

6.2. THE NATURAL GAS CONTROL VALVE WILL CLOSE

6.3. GENERATOR WILL DECOUPLE FROM THE ICE AND SHUT DOWN.

6.4. ANCILLARY HEAT RECOVERY EQUIPMENT WILL SHUT DOWN

6.5. AFTERCOOLER RADIATOR WILL CONTINUE RUNNING UNTIL SATISFACTORY

COOL DOWN TEMPERATURE SET POINT IS REACHED. AFTER THAT, THE

AFTERCOOLER RADIATOR AND ASSOCIATED LOOP PUMPS WILL SHUT DOWN

6.6. THE FLUE GAS BYPASS DAMPER WILL MODULATE TO FULL BYPASS

6.7. AS HRSG STEAM PRODUCTION DROPS, THE HRSG OUTLET NON‐RETURN

VALVE WILL CLOSE. WHEN STEAM FLOW IS ZERO, THE BOILER OUTLET STOP

MOTOR OPERATED VALVE WILL CLOSE

6.8. THE HRSG FEED WATER CONTROL VALVE WILL REMAIN OPERATIONAL. AFTER

A SET PERIOD OF TIME, THE MOTOR OPERATED FEED WATER ISOLATION

VALVE WILL CLOSE

6.9. AN ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE

6.10. WHEN CHP GENERATOR IS AVAILABLE FOR RESTORATION, GENERATOR

WILL STARTUP AND SYNCH WITH PULASKI FEEDER, CHP GENERATOR WILL

THEN CLOSE, AND STARTUP UP SEQUENCE SHALL BE FOLLOWED AS

DESCRIBED ABOVE IN SECTION III.

7. STEAM AND POWER GENERATION FAULT CONDITION #2‐THE PULASKI FEEDER

UTILITY POWER IS LOST.

7.1. THE MG BREAKER WILL OPEN. THE CHP GENERATOR BREAKER WILL

AUTOMATICALLY OPEN EITHER VIA PSE&G'S DTT EQUIPMENT OR FROM LOCAL

UNDER VOLTAGE RELAY SIGNAL.

7.2. THE GENERATOR WILL IDLE FOR A SET PERIOD OF TIME, TO ALLOW FOR

UTILITY POWER TO COME BACK.

7.3. IF THE UTILITY POWER IS RESTORED WITHIN THE TIME LIMIT, (this may be a PSE&G input)THE GENERATOR CONTROLS WILL RESYNC TO PULASKI FEEDER

AND MG BREAKER WILL CLOSE.

7.4. IF THE TIMEOUT IS REACHED, THE GENERATOR WILL SHUT DOWN. SEE

PREVIOUS SECTION VI.

7.5. NORTHPORT VA PERSONNEL OR THEIR HIGH VOLTAGE ELECTRICIAN

REPRESENTATIVE (ELEMCO) WILL CONTACT PSE&G VIA TELEPHONE AND

REQUEST TO OPEN THE PULASKI BREAKER AND TO CLOSE THE TIE BREAKER.

7.6. ONCE PSE&G HAS GIVEN APPROVAL VIA TELEPHONE, THE PULASKI BREAKER

WILL BE MANUALLY OPENED AND THE TIE BREAKER WILL BE MANUALLY

CLOSED IN THAT ORDER. AT THIS POINT, THE REMAINDER OF THE SITE WILL

BE SUPPORTED BY THE ELWOOD UTILITY

7.7. NORTHPORT VA ELECTRICIANS CAN BEGIN TO LOAD SHED WITH EMERGENCY

GENERATORS IF NECESSARY.

7.8. WHEN THE PULASKI UTILITY FEED IS AVAILABLE FOR RESTORATION

7.8.1. PSE&G WILL CONTACT NORTHPORT VA ELECTRICIANS OR THEIR

HIGH VOLTAGE ELECTRICIAN DESIGNEE (ELEMCO) AND ADVISE THAT

PULASKI FEEDER IS AVAILABLE.

7.8.2. TELEPHONE COMMUNICATION WILL BE MAINTAINED WITH PSE&G

DURING THE MANUAL RESTORATION WITH THE SEQUENCE FOLLOWING:

7.8.2.1. TIE BREAKER IS MANUALLY OPENED.

7.8.2.2. PULASKI BREAKER IS MANUALLY CLOSED.

8. STEAM AND POWER GENERATION FAULT CONDITION #3‐THE ICE ENCOUNTERS A

FAULT AND SHUTS DOWN

8.1. THE MG BREAKER WILL OPEN

8.2. THE NATURAL GAS CONTROL VALVE WILL CLOSE

8.3. ANCILLARY HEAT RECOVERY EQUIPMENT WILL SHUT DOWN.

8.4. AFTERCOOLER RADIATOR WILL CONTINUE RUNNING UNTIL SATISFACTORY

COOL‐DOWN TEMPERATURE SET POINT IS REACHED. AFTER THAT THE

AFTERCOOLER RADIATOR AND ASSOCIATED LOOP PUMPS WILL SHUT DOWN.

8.5. THE FLUE GAS BYPASS DAMPER WILL MODULATE TO FULL BYPASS.

8.6. AS HRSG STEAM PRODUCTION DROPS, THE HRSG OUTLET NON‐RETURN

VALVE WILL CLOSE. WHEN STEAM FLOW IS ZERO, THE BOILER OUTLET STOP

MOTOR OPERATED VALVE WILL CLOSE

8.7. THE HRSG FEED WATER CONTROL VALVE WILL REMAIN OPERATIONAL. AFTER

A SET PERIOD OF TIME, THE MOTOR OPERATED FEEDWATER ISOLATION

VALVE WILL CLOSE

8.8. AN ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE

9. STEAM AND POWER GENERATION FAULT CONDITION #4‐ THE HRSG ENCOUNTERS

A FAULT AND SHUTS DOWN

9.1. HRSG FAULTS INCLUDE LOW WATER LEVEL, LOSS OF BOILER FEED PUMP

RUNNING STATUS, OR HIGH STEAM PRESSURE

9.2. THE FLUE GAS BYPASS DAMPER WILL MODULATE TO FULL BYPASS POSITION.

9.3. AS HRSG STEAM PRODUCTION DROPS, THE HRSG OUTLET NON‐RETURN

VALVE WILL CLOSE. WHEN STEAM FLOW IS ZERO, THE BOILER OUTLET

STOPMOTOR OPERATED VALVE WILL CLOSE

9.4. THE HRSG FEED WATER CONTROL VALVE WILL REMAIN OPERATIONAL. AFTER

A SET PERIOD OF TIME, THE MOTOR OPERATED FEED WATER ISOLATION

VALVE WILL CLOSE

9.5. AN ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE.

9.6. THE ICE WILL CONTINUE TO RUN IN POWER GENERATION ONLY MODE.

10. POWER GENERATION ONLY FAULT CONDITION #1‐ THE 2 MW GENERATOR

ENCOUNTERS A FAULT AND SHUTS DOWN

10.1. THE MG BREAKER WILL OPEN

10.2. THE NATURAL GAS CONTROL VALVE WILL CLOSE.

10.3. GENERATOR WILL DECOUPLE FROM THE ICE AND SHUT DOWN.

10.4. ANCILLARY HEAT RECOVERY EQUIPMENT WILL SHUT DOWN

10.5. AFTERCOOLER RADIATOR WILL CONTINUE RUNNING UNTIL

SATISFACTORY COOL‐DOWN TEMPERATURE SET POINT IS REACHED. AFTER

THAT THE AFTER-COOLER RADIATOR AND ASSOCIATED LOOP PUMPS WILL

SHUT DOWN

10.6. AN ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE

11. POWER GENERATION ONLY FAULT CONDITION #2‐THE PULASKI FEEDER UTILITY

POWER IS LOST.

11.1. THE MG BREAKER WILL OPEN.

11.2. THE GENERATOR WILL IDLE FOR A SET PERIOD OF TIME, TO ALLOW FOR

UTILITY POWER TO COME BACK.

11.3. IF THE UTILITY POWER IS RESTORED WITHIN THE TIME LIMIT, THE

GENERATOR CONTROLS WILL RESYNC TO PULASKI FEEDER AND MG

BREAKER WILL CLOSE.

11.4. IF THE TIMEOUT IS REACHED, THE GENERATOR WILL SHUT DOWN.

12. POWER GENERATION ONLY FAULT CONDITION #3‐THE ICE ENCOUNTERS A FAULT

AND SHUTS DOWN

12.1. THE MG BREAKER WILL OPEN.

12.2. THE NATURAL GAS CONTROL VALVE WILL CLOSE.

12.3. GENERATOR WILL DECOUPLE FROM THE ICE AND SHUT DOWN.

12.4. ANCILLARY HEAT RECOVERY EQUIPMENT WILL SHUT DOWN.

12.5. AFTERCOOLER RADIATOR WILL CONTINUE RUNNING UNTIL

SATISFACTORY COOL‐DOWN TEMPERATURE SET POINT IS REACHED. AFTER

THAT THE AFTERCOOLER RADIATOR AND ASSOCIATED LOOP PUMPS WILL

SHUT DOWN.

12.6. AN ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE.

13. POWER GENERATION ONLY FAULT CONDITION #4‐ISLAND MODE WHEN PULASKI

AND ELWOOD ARE LOST

13.1. THE SAME SEQUENCE SHALL BE FOLLOWED FOR POWER AND STEAM

GENERATION. ASSOCIATE MECHANICAL EQUIPMENT SHALL FOLLOW

PREVIOUSLYSTATED SEQUENCE.

13.2. CHP GENERATOR BREAKER WILL AUTOMATICALLY OPEN EITHER VIA

PSE&G'S DTT EQUIPMENT OR FROM LOCAL UNDER VOLTAGE RELAY SIGNAL

13.3. CHP GENERATOR WILL SHUT DOWN AUTOMATICALLY

13.4. WHEN CHP GENERATOR IS AVAILABLE TO OPERATE IN ISLAND‐MODE:

13.4.1.1. NORTHPORT VA ELECTRICIAN OR THEIR EXTERNAL HIGH

VOLTAGE ELECTRICIANS (ELEMCO) WILL CONTACT NORTHPORT VA

ELECTRICIAN OR THEIR EXTERNAL HIGH VOLTAGE ELECTRICIANS

(ELEMCO) WILL CONTACT PSE&G VIA TELEPHONE REQUESTING

PERMISSION TO OPEN THE ELWOOD & PULASKI UTILITY FEED

BREAKERS AND CLOSE THE TIE BREAKER.

13.4.1.2. ONCE REQUEST IS GRANTED BY PSE&G THE UTILITY BREAKERS

WILL BE OPENED BY VA REPRESENTATIVES OR THEIR DESIGNEE AND

THE TIE BREAKER WILL BE CLOSED.

13.4.1.3. MANUAL START OF GENERATOR BY VA OR THEIR DESIGNER.

13.4.1.4. THE GENERATOR SHALL BE STARTED MANUALLY AND UPON

SYNCHRONIZATION, THE MG BREAKER SHALL BE CLOSED. WHEN THE

UTILITY FEEDS ARE READY TO BE RESTORED (PULASKI & ELWOOD)

13.4.1.5. WHEN THE UTILITY FEEDS ARE READY TO BE RESTORED

(PULASKI AND ELWOOD), PSE&G WILL CONTACT NORTHPORT

ELECTRICIANS OR THEIR HIGH VOLTAGE DESIGNEE AND ADVISE

THAT THE PULASKI AND ELWOOD FEEDERS ARE AVAILABLE FOR

RESTORATION.

13.4.1.6. GENERATOR BREAKER SHALL BE MANUALLY OPENED, SHUTTING

DOWN THE GENERATOR.

13.4.1.7. VA ELECTRICIANS OR THEIR HIGH VOLTAGE ELECTRICIAN

DESIGNEE (ELEMCO) WILL BE IN DIRECT TELEPHONE CONTACT WITH

PSE&G WHEN PERFORMING THE ORDERED MANUAL BREAKER

SWITCHING:

13.4.1.8. TIE BREAKER IS OPEN.

13.4.1.9. PULASKI BREAKER IS CLOSED.

13.4.1.10. ELWOOD BREAKER IS CLOSED.

13.4.2. GENERATOR SHALL BE MANUALLY STARTED BY VA OR THEIR

DESIGNEE.

13.4.3. CHP GENERATOR SYNCH'S WITH PULASKI FEED.

13.4.4. CHP GENERATOR BREAKER AUTOMATICALLY.

13.4.5. SHED LOADS ARE RESTORED TO UTILITY FEED FROM EMERGENCY

GENERATORS

14. POWER GENERATION ONLY FAULT CONDITION #5: DIRECT TRANSFER TRIP (DTT)

IS LOST

14.1. THE MG BREAKER WILL OPEN.

14.2. THE GENERATOR WILL IDLE FOR A SET PERIOD OF TIME, TO ALLOW FOR

DTT CONNECTIVITY TO COME BACK.

14.3. IF THE DTT CONNECTIVITY IS RESTORED WITHIN THE TIME LIMIT, THE

GENERATOR CONTROLS WILL RESYNC TO PULASKI FEEDER AND MG

BREAKER WILL CLOSE.

14.4. IF THE TIMEOUT IS REACHED, THE GENERATOR WILL SHUT DOWN. SEE

SECTION XI AND VIII.

15. ANCILLARY SYSTEM SEQUENCE OF OPERATIONS‐EXISTING FEED WATER SYSTEM

15.1. STARTUP:

15.1.1. HRSG CONTROLS WILL REQUEST EXISTING FEED WATER PUMP

OPERATION (HRSG START PERMISSIVE)

15.1.2. HRSG CONTROLS WILL VERIFY WITH EXISTING CONTROL SYSTEM

THAT AT LEAST ONE FEED WATER PUMP IS RUNNING AND NOT FAULTED

15.2. OPERATION:

15.2.1. EXISTING FEED WATER PUMP(S) SHALL BE CONTROLLED FROM

THE EXISTING CONTROL SYSTEM, AND AT LEAST ONE (1) PUMP SHALL

REMAIN IN OPERATION WHENEVER THE HRSG IS OPERATIONAL.

15.2.2. IN CASE OF PUMP FAULT, EXISTING CONTROL SYSTEM SHALL

SEND INSTRUCTION TO HRSG CONTROLS TO SHUTDOWN THE HRSG. AN

ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE.

16. ANCILLARY SYSTEM SEQUENCE OF OPERATIONS‐HEAT REJECTION ‐ JACKET

WATER LOOP

16.1. STARTUP:

16.1.1. JACKET WATER LOOP OPERATION WILL BE INITIATED BEFORE

THE START OF THE INTERNAL COMBUSTION ENGINE

16.1.2. RADIATOR BY‐PASS THREE‐WAY VALVE SHALL MOVE TO ISOLATE

RADIATOR FROM JACKET WATER LOOP

16.1.3. RADIATOR PUMP WILL BE STARTED AND RADIATOR FANS WILL BE

STARTED IN MINIMUM CAPACITY STATE.

16.1.4. MAIN JACKET WATER LOOP PUMP WILL BE STARTED.13.1.5.

INTERNAL COMBUSTION ENGINE WILL BE GIVEN PERMISSION TO START

ONCE FLOW THROUGH MAIN JACKET WATER PUMP IS CONFIRMED

16.2. OPERATION:

16.2.1. JACKET WATER MAIN PUMP WILL RUN CONTINUOUSLY. RADIATOR

WATER PUMP WILL RUN CONTINUOUSLY.

16.2.2. RADIATOR CONTROLS WILL MODULATE RADIATOR OPERATION TO

MAINTAIN SET DISCHARGE WATER TEMPERATURE.

16.2.3. THREE‐WAY VALVE WILL MODULATE BASED ON RADIATOR

DISCHARGE WATER TEMPERATURE, INTERNAL COMBUSTION ENGINE'S

OPERATING TEMPERATURE AND JACKET WATER MAIN LOOP

TEMPERATURE IN ORDER TO PROVIDE MIXING TO MEET SETPOINT

JACKET WATER RETURN TEMPERATURE

16.2.4. IN CASE OF FAULT, ICE WILL BE INSTRUCTED TO SHUT DOWN. AN

ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE.

17. ANCILLARY SYSTEM SEQUENCE OF OPERATIONS‐HEAT REJECTION ‐

AFTERCOOLER WATER LOOP

17.1. STARTUP:

17.1.1. AFTERCOOLER WATER LOOP OPERATION WILL BE INITIATED

BEFORE THE START OF THE INTERNAL COMBUSTION ENGINE AND IN

CASE OF ICE SHUTDOWN, AFTERCOOLER LOOP WILL RUN ON

SUPPLEMENTAL POWER UNTIL AFTERCOOLER TEMPERATURE REACHES

SETPOINT COOLDOWN TEMPERATURE.

17.1.2. AT STARTUP, THREE‐WAY VALVE SHALL MODULATE TO FULL

BY‐PASS OF THE RADIATOR

17.1.3. THE LOOP PUMP WILL BE STARTED.

17.1.4. THE LOOP WILL GIVE THE PERMISSIVE FOR THE ICE TO START.

17.2. OPERATION:

17.2.1. CHP CONTROLS WILL MONITOR THE WATER LOOP TEMPERATURE

SENSORS AND MODULATE THE OPERATION OF THREE‐WAY VALVE AND

RADIATOR OPERATION TO PROVIDE SETPOINT AFTERCOOLER COOLING

WATER RETURN TEMPERATURE

17.2.2. IN CASE OF FAULT, ICE WILL BE INSTRUCTED TO SHUT DOWN. AN

ALARM WILL BE GENERATED AT OPERATOR'S INTERFACE.

18. ANCILLARY SYSTEM SEQUENCE OF OPERATIONS‐HEAT RECOVERY ‐

CONDENSATE PRE‐HEAT LOOP

18.1. CONDENSATE PREHEAT BETWEEN SURGE TANK AND DEAERATOR TANK

HYDRONIC HEATING LOOP SHALL OPERATE WHENEVER CHP IS OPERATIONAL

BY REJECTING JACKET WATER HEAT TO THE CONDENSATE RETURN SYSTEM

WITHIN THE EXISTING BOILER PLANT.

18.2. STARTUP:

18.2.1. CHP CONTROLS WILL VERIFY THAT THE ICE HAS ACHIEVED A

STABLE OPERATING TEMPERATURE AND RPM BEFORE ATTEMPTING TO

START THE HEAT RECOVERY LOOP.

18.2.2. UPON INITIATION OF HEAT RECOVERY LOOP, THE CONDENSATE

RETURN THREE‐WAY VALVE SHALL DIVERT THE FLOW OF CONDENSATE

TO THE HEAT RECOVERY HEAT EXCHANGER.

18.2.3. ONCE THE FLOW METER IN THE HEAT EXCHANGER LOOP

REACHES SETPOINT THE SUPPLEMENTARY LOOP PUMP WILL BE

ENGAGE TO START IN ORDER TO MAINTAIN SETPOINT PRESSURE

DIFFERENTIAL.

18.2.4. THE JACKET WATER CONTROL VALVE ON THE HOT SIDE OF HEAT

EXCHANGER WILL THEN OPEN.

18.3. OPERATION:

18.3.1. THE JACKET WATER CONTROL VALVE ON THE HOT SIDE OF HEAT

EXCHANGER WILL MODULATE THE RATE OF FLOW OF JACKET WATER

INTO HEAT EXCHANGER IN ORDER TO MAINTAIN SETPOINT DISCHARGE

TEMPERATURE OF CONDENSATE ON THE COLD SIDE OF THE HEAT

RECOVERY HEAT EXCHANGER.

18.3.2. IN CASE OF FAULT, CIRCULATING PUMP WILL BE POWERED OFF,

JACKET WATER CONTROL VALVE ON THE HOT SIDE OF THE HEAT

EXCHANGER WILL CLOSE AND THEN THE THREE‐WAY VALVE ON THE

CONDENSATE RETURN LINE WILL SWITCH TO BY‐PASS THE HEAT

RECOVERY HEAT EXCHANGER. AN ALARM WILL BE GENERATED AT

OPERATOR'S INTERFACE.

19.ANCILLARY SYSTEM SEQUENCE OF OPERATIONS‐HEAT RECOVERY ‐

BUILDING 92 HYDRONIC HEAT LOOP

19.1. HYDRONIC HEAT LOOP FOR BUILDING 92 SHALL OPERATE

WHENEVER CHP IS OPERATIONAL BY REJECTING JACKET WATER HEAT

TO THE EXISTING DOMESTIC HOT WATER AND HEAT HOT WATER

SYSTEMS.

19.2. STARTUP:

19.2.1. CHP CONTROLS WILL VERIFY THAT THE ICE HAS ACHIEVED A

STABLE OPERATING TEMPERATURE AND RPM BEFORE

ATTEMPTING TO START THE HEAT RECOVERY LOOP.

19.2.2. UPON INITIATION OF HEAT RECOVERY, THE THREE‐WAY

VALVE IN EXISTING HEATING HOT WATER LOOP SHALL BE

ENGAGED TO MODULATE AND CONTROL THE RETURN

TEMPERATURE FROM THE HEAT EXCHANGER.

19.2.3. HEATING HOT WATER BOOSTER PUMP SHALL BE ENGAGED

TO HELP OVERCOME THE PIPE AND HEAT EXCHANGER

PRESSURE.

19.2.4. ONCE DISCHARGE TEMPERATURE FROM HEATING HOT

WATER HEAT EXCHANGER REACHES 180F SET POINT, THE

DOMESTIC WATER PREHEAT LOOP SHALL BE ENGAGED.

19.2.5. DOMESTIC WATER THREE‐WAY VALVE CV‐5 WILL BE

ENGAGED TO MODULATE BETWEEN BY‐PASS AND HEAT

EXCHANGER FLOW TO OBTAIN A SET POINT DISCHARGE

TEMPERATURE.

19.3. OPERATION:

19.3.1. THREE‐WAY VALVE ON THE HEATING HOT WATER RETURN

LOOP WILL MODULATE TO ENSURE SET POINT DISCHARGE

TEMPERATURE.

19.3.2. THREE‐WAY VALVE ON THE DOMESTIC COLD WATER MAKEUP

LOOP WILL MODULATE TO ENSURE SET POINT DISCHARGE

TEMPERATURE

19.3.3. IN CASE OF FAULT, CIRCULATING PUMP(S) WILL BE POWERED

OFF, THREE‐WAY VALVES WILL BE RESET TO HEAT EXCHANGER

BY‐PASS. AN ALARM WILL BE GENERATED AT OPERATOR'S

INTERFACE.

20.ANCILLARY SYSTEM SEQUENCE OF OPERATIONS‐HEAT RECOVERY ‐

NATURAL GAS FLOW METERS/PRESSURE MONITORING

20.1. THE GAS FLOW METERS SHALL INDICATE FLOW/STATUS

CONTINUOUSLY.

20.2. THE PRESSURE TRANSMITTERS SHALL INDICATE STATUS. IF VALUES

RISE AND DROP GREATER THAN 20% OF SET POINT, AN ALARM WILL BE

DISPLAYED AT THE OPERATOR'S CONTROL PANEL.

See attached document: UPDATED Bid - Specifications.

See attached document: Site Walkthrough Sign In Sheet.

See attached document: Certified Relay Test Report.

See attached document: Post Installation Certification.

See attached document: ATI NPVA - Certificate.

See attached document: NVMA Center-CESIR Report.

See attached document: Protection and Controls Test Plan 9-14-22.

See attached document: OI - 34610 - Northport VA - 020823.