Attachment A-Section 26 32 13-EngineGenerators.pdf

James J. Peters VAMC November 21, 2023 Replace Generac Generators 100% Bid Documents Bronx, NY 10468 Project No:526-20-107

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SECTION 26 32 13

ENGINE GENERATORS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies furnishing, installation, connection, and testing of the accessories for the existing engine generators.

1.2 RELATED WORK

A. Section 23 07 11, HVAC, PLUMBING, AND BOILER PLANT INSULATION:

Requirements for hot piping and equipment insulation.

B. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS:

Requirements that apply to all sections of Division 26.

C. Section 26 05 19, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES:

Low-voltage conductors.

D. Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS:

Requirements for personnel safety and to provide a low impedance path for possible ground fault currents.

E. Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT: Requirements for pipe and equipment support and noise control.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with Paragraph, QUALIFICATIONS

(PRODUCTS AND SERVICES) in Section 26 05 11, REQUIREMENTS FOR

ELECTRICAL INSTALLATIONS.

B. A factory-authorized representative shall be capable of providing emergency maintenance and repairs at the project site within 4 hours maximum of notification.

1.4 FACTORY TESTS (NOT USED)

1.5 SUBMITTALS

A. Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements:

1. Shop Drawings:

a. Submit sufficient information to demonstrate compliance with drawings and specifications.

b. Scaled drawings, showing plan views, side views, elevations, and cross-sections.

2. Diagrams:

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a. Control system diagrams, control sequence diagrams or tables, wiring diagrams, interconnections diagrams (between engine generators, automatic transfer switches, paralleling switchgear, local control cubicles, remote annunciator panels, and fuel storage tanks, as applicable), and other like items.

3. Technical Data:

a. Published ratings, catalog cuts, pictures, and manufacturer’s specifications for muffler, day tank, pumps, fuel tank, and control and supervisory equipment.

b. Description of operation.

d. Sound power level data.

4. Manuals:

a. When submitting the shop drawings, submit complete maintenance and operating manuals, to include the following:

1) Technical data sheets.

2) Wiring diagrams.

3) Include information for testing, repair, troubleshooting, and factory recommended periodic maintenance procedures and frequency.

4) Provide a replacement and spare parts list. Include a list of tools and instruments for testing and maintenance purposes.

b. If changes have been made to the maintenance and operating manuals originally submitted, submit updated maintenance and operating manuals two weeks prior to the final inspection.

5. Test Reports:

a. Submit certified factory test reports for approval.

b. Submit field test reports two weeks prior to the final inspection.

1.6 STORAGE AND HANDLING (NOT USED)

1.7 JOB CONDITIONS

A. Job conditions shall conform to the arrangements and details shown on the drawings. The dimensions, enclosures, and arrangements of the engine generator system shall permit the operating personnel to safely and conveniently operate and maintain the system in the space designated for installation.

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1.8 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only.

B. American Society of Testing Materials (ASTM):

A53/A53M-12.............Standard Specification for Pipe, Steel, Black, and Hot–Dipped, Zinc Coated Welded and Seamless

B88-16..................Specification for Seamless Copper Water Tube

B88M-16.................Specification for Seamless Copper water Tube

(Metric)

D975-17.................Diesel Fuel Oils

C. Institute of Electrical and Electronic Engineers (IEEE):

C37.13-15...............Low Voltage AC Power Circuit Breakers Used In

Enclosures

C37.90.1-12.............Surge Withstand Capability (SWC) Tests for

Relays and Relay Systems Associated with

Electric Power Apparatus

D. International Code Council (ICC):

IBC-2021................International Building Code

E. International Organization for Standardization (ISO):

8528-1-05...............Reciprocating Internal Combustion Engine-Driven

Alternate Current Generating Sets – Part 1:

Application, Ratings and Performance

F. National Electrical Manufacturers Association (NEMA):

C38.50-12...............Low-Voltage AC Power Circuit Breakers Used In

Enclosures - Test Procedure

ICS 6-93(R2016).........Enclosures

ICS 4-15................Application Guideline for Terminal Blocks

MG 1-16.................Motor and Generators

MG 2-14.................Safety Standard and Guide for Selection, Installation and Use of Electric Motors and

Generators

PB 2-11.................Dead-Front Distribution Switchboards

250-14..................Enclosures for Electrical Equipment (1000 Volts

Maximum)

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G. National Fire Protection Association (NFPA):

30-18...................Flammable and Combustible Liquids Code

37-18...................Installations and Use of Stationary Combustion

Engine and Gas Turbines

70-17...................National Electrical Code (NEC)

99-18...................Health Care Facilities

110-16..................Standard for Emergency and Standby Power

Systems

H. Underwriters Laboratories, Inc. (UL):

50-15...................Enclosures for Electrical Equipment

142-06..................Steel Aboveground Tanks for Flammable and

Combustible Liquids

467-13..................Grounding and Bonding Equipment

489-16..................Molded-Case Circuit Breakers, Molded-Case

Switches and Circuit-Breaker Enclosures

508-99..................Industrial Control Equipment

891-05..................Switchboards

1236-15.................Battery Chargers for Charging Engine-Starter

Batteries

2085-97.................Insulated Aboveground Tanks for Flammable and

Combustible Liquids

2200-12.................Stationary Engine Generator Assemblies

PART 2 - PRODUCTS

2.1 GENERAL REQUIREMENTS

A. The engine generator system accessories shall be in accordance with

ASTM, ISO, NEMA, NFPA, UL, as shown on the drawings, and as specified herein.

B. Provide a factory-assembled, wired (except for field connections), complete, fully automatic engine generator fuel supply system, as well as all associate equipment and devices intended for the operating, control, monitoring, and remote manual stop functions.

C. Connections between components of the system shall conform to the recommendations of the manufacturer.

D. Couplings, shafts, and other moving parts shall be enclosed and guarded. Guards shall be metal, ruggedly constructed, rigidly fastened, and readily removable for convenient servicing of the equipment without disassembling any pipes and fittings.

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2.2 ENGINE (NOT USED)

2.3 GOVERNOR (NOT USED)

2.4 LUBRICATION OIL SYSTEM (NOT USED)

2.5 FUEL SYSTEM

A. Main fuel storage tank(s) shall comply with the requirements of Section

23 10 00, FACILITY FUEL SYSTEMS.

B. Shall comply with NFPA 37 and NFPA 30, and have the following features:

1. Injection pump(s) and nozzles.

2. Plungers shall be carefully lapped for precision fit and shall not require any packing.

3. Filters or screens that require periodic cleaning or replacement shall not be permitted in the injection system assemblies.

4. Return surplus oil from the injectors to the main storage tank by gravity or a pump.

5. Filter System:

a. Dual primary filters shall be located between the main fuel oil storage and day tank.

b. Secondary filters (engine-mounted) shall be located such that the oil shall be thoroughly filtered before it reaches the injection system assemblies.

c. Filters shall be cleanable or replaceable type and shall entrap and remove water from oil as recommended by the engine manufacturer.

C. Day Tank (Existing):

1. Each engine generator has an existing welded steel separate self-supporting day tank with double-wall fuel containment.

2. Each day tank has the capacity to supply fuel to the engine for a

30-hour period at 100% rated load without being refilled, including fuel that is returned to the main fuel storage tank.

3. Secure, pipe, and connect the tank adequately for maximum protection from fire hazards, including oil leaks.

4. Incorporate a vent, drain cock, shutoff cocks, and gauge glass.

Terminate the vent piping outdoors with mushroom vent cap as required for a complete system with the addition of the fuel oil transfer system.

5. Incorporate a float switch on the day tank to control the fuel oil transfer pump and to actuate an alarm in the engine generator

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26 32 13 - 6 control cubicle when the oil level in the tank drops below the level at which the transfer pump should start to refill the tank.

a. The float switch contacts controlling the fuel oil transfer pump shall be set to energize the pump when the liquid level in the tank reaches one-third of the total volume of the tank.

b. The float switch contacts that actuate the low fuel oil day tank alarm device shall be set to alarm and energize the second fuel transfer pump when the liquid level in the tank reaches one-quarter of the total volume of the tank.

6. Day tank and engine supply line elevations shall remain as is, be below the elevation of the injector return outlet on the engine.

D. Fuel Transfer Pump - Main Storage Tank to Day Tank(s):

1. Electric motor-driven, duplex arrangement, close-coupled, single-stage, positive-displacement type with built-in pressure relief valves. When the fuel is used for cooling components of the fuel injection system, the engine's fuel return line shall be returned to the main storage tank, rather than the day tank.

2. Include a heavy-duty automatic alternator and H-O-A switch to alternate sequence of pumps. Pumps shall be controlled with the float switch on the day tank and H-O-A selector switch such that the day tank will be refilled automatically when the oil level lowers to the low limit for the float switch. The H-O-A selector switches shall enable the pumps to be operated manually at any time.

3. For all engines, the related transfer pump and its electrical and plumbing connections shall be sized to provide a flow rate of at least four times the engine's fuel pumping rate.

4. Provide a manually-operated, rotary-type transfer pump connected in parallel with the electric motor-driven transfer pumps so that oil can be pumped to the day tank while the electric motor-driven pumps are inoperative.

E. Piping System: Black steel standard weight ASTM A-53 pipe and necessary valves and pressure gauges between:

1. The engine and the day tank as shown on the drawings.

2. The day tank and the supply and return connections at the underground storage tank as shown on the drawings. Connections at the engine shall be made with flexible piping suitable for the fuel furnished.

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2.6 COOLING SYSTEM (NOT USED)

2.7 AIR INTAKE AND EXHAUST SYSTEMS

A. Air Intake (Not Used)

B. Exhaust System:

1. Pressure drop in the complete exhaust system shall be small enough for satisfactory operation of the engine generator while it is delivering 100% of its specified rating.

2. Pipe size from muffler to air discharge shall be two pipe sizes larger than engine exhaust pipe.

3. Connections at the engine exhaust outlet shall be made with a flexible exhaust pipe. Provide bolted type pipe flanges welded to each end of the flexible section.

C. Condensate drain at muffler shall be made with schedule 40 black steel pipe through a petcock.

D. Exhaust Piping and Supports: Black steel pipe, ASTM A-53 standard weight with welded fittings. Spring type hangers, as specified in

Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND

EQUIPMENT, shall support the pipe.

2.8 ENGINE STARTING SYSTEM (NOT USED)

2.10 JACKET COOLANT HEATER (NOT USED)

2.11 GENERATOR (NOT USED)

2.12 GENERATOR OVERCURRENT AND FAULT PROTECTION (NOT USED)

2.13 CONTROLS

A. Shall include Engine Generator Control Cubicle(s).

B. General:

1. Control equipment shall be in accordance with UL 508, NEMA ICS-4, ICS-6, and ANSI C37.90.1.

2. Panels shall be in accordance with UL 50.

3. Cubicles shall be in accordance with UL 891.

4. Coordinate controls with the existing controls so that the systems will operate as specified.

5. Cubicles:

a. Code gauge steel: manufacturer's recommended heavy gauge steel with factory primer and light gray finish.

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b. Doors shall be gasketed, attached with concealed or semi-concealed hinges, and shall have a permanent means of latching in closed position.

c. Panels shall be wall-mounted or incorporated in other equipment as indicated on the drawings or as specified.

d. Door locks for panels and cubicles shall be keyed identically to operate from a single key.

6. Wiring: Insulated, rated at 600 V.

a. Install the wiring in vertical and horizontal runs, neatly harnessed.

b. Terminate all external wiring at heavy duty, pressure-type, terminal blocks.

7. The equipment, wiring terminals, and wires shall be clearly and permanently labeled.

8. The appropriate wiring diagrams shall be laminated or mounted under plexiglass within the frame on the inside of the cubicles and panels.

9. All indicating lamps and switches shall be accessible and mounted on the cubicle doors.

11. The manufacturer shall coordinate the interconnection and programming of the generator controls with all related equipment as applicable, specified in other sections.

C. Engine generator Control Cubicle:

a. A maintained-contact, red mushroom-head push-button switch marked

"EMERGENCY STOP" will cause the engine to stop without a cool-down period, independent of the position of the selector switch.

3. Supervisory Controls:

a. Low Fuel - Day Tank:

When the fuel oil level in the day tank decreases to less than the level at which the fuel oil transfer pump should start to refill the tank, the LOW FUEL DAY TANK light and the audible alarm shall be energized.

b. Low Fuel - Main Storage Tank:

When the fuel oil level in the storage tank decreases to less than one-third of total tank capacity, the LOW FUEL-MAIN STORAGE

TANK signal light and audible alarm shall be energized.

c. Reset Alarms and Signals:

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Low Fuel signal lights and the associated audible alarms shall require manual reset. A momentary-contact silencing switch and push-button shall silence the audible alarm by using relays or solid state devices to seal in the audible alarm in the de-energized condition. Elimination of the alarm condition shall automatically release the sealed-in circuit for the audible alarm so that it shall be automatically energized again when the next alarm condition occurs. The signal lights shall require manual reset after elimination of the condition which caused them to be energized. Install the audible alarm just outside the engine generator room in a location as directed by the COR. The audible alarm shall be rated for 85 dB at 3 M (10 feet).

4. Monitoring Devices:

e. Visual Indications:

1) LOW FUEL - DAY TANK

2) LOW FUEL – MAIN STORAGE TANK

f. Lamp Test: The LAMP TEST momentary contact switch shall momentarily actuate the alarm buzzer and all the indicating lamps.

2.14 REMOTE MANUAL STOP STATION

A. Shall be provided per NFPA 101, and shall be a red mushroom-head push-button switch.

B. Shall be connected to the main generator control panel to provide emergency shutdown of the generator.

C. Shall be located outside the room housing the generator, as shown on the contract documents in a weatherproof housing.

D. Shall have permanent label reading “EMERGENCY STOP”.

2.15 REMOTE ANNUNCIATOR PANEL

A. A remote annunciator panel shall be installed at location as shown on the drawings, for each of the existing generators.

B. The annunciator shall indicate alarm conditions as required by NFPA 99 and 110. The remote annunciator shall have an audible notification of any alarm or warning condition.

C. Include control wiring between the remote annunciator panel and the engine generator. Wiring shall be as required by the manufacturer.

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2.16 SOUND-ATTENUATED ENCLOSURE (NOT USED)

2.17 SPARE PARTS

A. For each control panel:

1. Three complete sets of fuses, if applicable.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install concrete bases of dimensions shown on the drawings.

B. Mounting:

1. All connections between the engine generator and exterior systems, such as fuel lines, electrical connections, and engine exhaust system and air exhaust shroud, shall be flexible.

C. Connect all components of the generator system so that they will continue to be energized during failure of the normal electrical power supply system.

D. Install piping between engine generator and remote components of fuel and exhaust systems.

3.2 ACCEPTANCE CHECKS AND TESTS

A. When the complete engine generator system accessories have been installed and prior to the final inspection, test all components of the system in the presence of the COR for proper operation of the individual components and the complete system and to eliminate electrical and mechanical defects.

B. Furnish fuel oil for testing of the engine generator.

C. Visual Inspection: Visually verify proper installation of engine generator accessories per manufacturer’s pre-functional installation checklist.

E. Set engine generator circuit breaker protective functions per Section

26 05 73, OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY.

F. Field Tests:

1. Perform manufacturer’s after-starting checks and inspections.

2. Test the engine generator for six hours of continuous operation as follows:

a. Two hours while delivering 100% of the specified kW.

b. Four hours while the engine generator is delivering 80% of its specified kW rating.

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c. If during the 6-hour continuous test, an engine generator failure occurs or the engine generator cannot maintain specified power output, the test(s) are null and void. After repair and/or adjustments, the test(s) shall be repeated at no additional cost to the Government until satisfactory results are attained.

3. Record the following test data at 30-minute intervals:

a. Time of day, as well as reading of running time indicator.

b. kW.

c. Voltage on each phase.

d. Amperes on each phase.

e. Engine RPM.

f. Frequency.

g. Coolant water temperature.

h. Fuel pressure.

i. Oil pressure.

j. Outdoor temperature.

k. Average ambient temperature in the vicinity of the engine generator.

4. Demonstrate that the engine generator will attain proper voltage and frequency within the specified time limit from a cold start after the closing of a single contact.

5. Furnish a resistance-type load for the testing of the engine generator. Test loads shall always include adequate resistance to assure stability of the loads and equipment during all of the testing operations. The test load kW rating shall not be less than

100% of the specified kW rating of the engine generator.

G. Starting System Test:

1. Demonstrate that the batteries and cranking motor are capable of five starting attempts of 10 seconds cranking each at 10-second intervals with the battery charger turned off.

H. Remote Annunciator Panel:

Simulate conditions to verify proper operation of each visual or audible indication, interconnecting hardware and software, and reset button.

D. I. Fuel systems shall be flushed and tested per Section 23 10 00, FACILITY FUEL SYSTEMS: Fuel supply and storage requirements.

E. Automatic Operation Tests:

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Test the engine generator and associated exhaust gas fans to demonstrate automatic starting, loading and unloading. The load for this test shall be the actual connected loads. Initiate loss of normal source and verify the specified sequence of operation.

Restore the normal power source and verify the specified sequence of operation. Verify resetting of controls to normal.

F. At the completion of the field tests, fill the main storage tank and day tank with fuel of grade and quality as recommended by the manufacturer of the engine. Fill all engine fluids to levels as recommended by manufacturer.

G. When any defects are detected during the tests, correct all the deficiencies and repeat all or part of the test as requested by the

COR, at no additional cost to the Government.

H. Provide test and inspection results in writing to the COR.

3.3 FOLLOW-UP VERIFICATION

A. After completion of acceptance checks, settings, and tests, the

Contractor shall demonstrate that the engine generator(s) and control and annunciation components are in good operating condition and properly performing the intended function.

3.4 INSTRUCTIONS AND FINAL INSPECTIONS

A. Laminate or mount under acrylic resin a set of operating instructions for the system and install instructions within a frame mounted on the wall near the engine generator at a location per the COR.

B. Furnish the services of a competent and factory-trained technician for one 4-hour period for instructions to VA personnel in operation and maintenance of the equipment, on the date requested by the COR.

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