SECTION 16620 STANDBY EMERGENCY CNG/LPG GENERATOR PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Compressed natural gas (CNG) or liquefied petroleum gas (LPG) powered standby emergency generators. B. Related Sections: 1. 03300 - Concrete. 2. Division 15 - Mechanical. 3. 15890 - Ductwork. 4. 5. 16250 - Automatic Transfer Switch. 16475 - Overcurrent Protective Devices. 1.02 SYSTEM DESCRIPTION A. Use of fuel oil system is not allowed. 1.03 SUBMITTALS A. Submit for review, properly identified product data material. B. Provide operating and maintenance manuals complete with replacement parts data for standby emergency generator system. C. Submit sample of written warranty with product data. D. Contract Closeout Submittal: Furnish the Board with manufacturer's certification and warranty assuring each item of equipment is complete and in good condition, free from damage, properly installed, connected, adjusted, and tested as to full power rating, stability, and voltage and frequency regulation. 1.04 QUALITY ASSURANCE A. Qualifications: Single source generator supplier and installer, acceptable to the standby emergency generator manufacturer, capable of providing, but not limited to, the following services: 1. Generator and electrical apparatus pertinent to the generator including the automatic transfer switches. 2. Complete fuel tank system. Project No. SPECIFICATION GUIDELINES 16620-1
3. Sheet metal shrouding. 4. Plumbing pertinent to the fuel system and generator. 5. Exhaust system and piping. 6. Insulation of exhaust system. 7. Control wiring between generator and transfer switch, water heater, battery charging, and annunciator wiring. 8. Required warranty. 9. Other work required for a complete and operable system. B. The Board will not accept 2 or more subcontractors to do the Standby Emergency Generator work. C. Performance Requirements: Materials shall bear Underwriters Laboratories (UL) labels. 1.05 WARRANTY A. Furnish standby emergency generator set completely by manufacturer and warranted for a period of 5 years from date of substantial completion. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Standby Electric Generator System: 1. Caterpillar. 2. Kohler. 3. Onan. 2.02 EQUIPMENT NOTE TO SPECIFIER: In the following sentence, specify the voltage requirements to suit project conditions. A. Standby Emergency Generator: Include an electric generator set rated for continuous standby service. B. Emergency Generator Fuel Tanks: Pressurized with uninterrupted, on-site, local fuel, such as CNG or LPG tanks. C. System shall be a package of new and current equipment consisting of: 1. A natural gas or electric engine driven generating set Project No. SPECIFICATION GUIDELINES 16620-2
to provide standby power. 2. An engine start-stop control system. 3. An automatic load transfer control to provide automatic starting and stopping of the engine and switching of the load as specified in Section 16250. 4. Mounted accessories as specified. D. The system shall be built, tested, and shipped by the manufacturer of the alternator so there is one source of supply and responsibility. The performance of this generating set series shall be certified by an independent testing laboratory as to the set's full power rating, stability and voltage and frequency regulation. NOTE TO SPECIFIER: The A/E shall provide the project specific information regarding engine performance requirements to suit project conditions. E. Engine: F. Engine Instrument Panel: G. Engine Controls: H. Alternator: Provide overcurrent protection on generator. I. Unit Performance: J. Alternator Instrument Panel: Wire, test, and shock mount on the generating set by the manufacturers of the alternator. It shall contain panel lighting, manual reset circuit breaker, frequency meter, running time meter, voltage adjusting rheostat, AC voltmeter (dual range, indicates all voltages), AC ammeter (dual range, indicates current in each phase), meter switch, voltmeter-ammeter phase selector with OFF position. K. Generator Mounting: 1. Concrete Pad: Provide a 6 inch high concrete pad under each emergency generator. 2. Equip with vibration isolators and mount on a welded steel base that shall provide suitable mounting to any level surface. L. Automatic Load Transfer Control: Complete automatic transfer switch shall be supplied by manufacturer of alternator. It shall include necessary relays and component Project No. SPECIFICATION GUIDELINES 16620-3
parts, with electrically and mechanically interlocked switches. See Section 16250. M. Accessories: Furnish accessories needed for the proper operation of the generating set. These shall include but not be limited to an exhaust muffler, flexible exhaust connection, starting batteries, battery cables, battery charger, battery rack, fuel oil day tank, and fuel lines. 1. Exhaust Muffler: All-welded design, constructed of sheet and plate steel. Provide with all necessary flexible exhaust connections as indicated on mechanical drawings for installation by mechanical contractor. Exhaust muffler manufacture: Maxim M-41 with side inlet or accepted equivalent. 2. Insulation: The muffler and all indoor exhaust piping shall be properly lagged using Kaylo 1800 degree F. insulation. Insulation will be furnished and installed under the insulation section. 3. Jacket water heater shall be installed inline with engine cooling system. Jacket water heater to be rated at 2 KW, at application voltage, single phase. PART 3 EXECUTION 3.01 INSTALLATION A. Install standby emergency generator according to the manufacturer's recommendations and according to the requirements of NFPA 70 - National Electrical Code - 1996 (NEC). 1. The following items of work relating to the emergency generators will be provided under other sections by different trades. a. Fuel System including main fuel oil storage tank, (day tanks), and piping, as specified. b. Cooling air intake and exhaust louvers. c. Sheetmetal ductwork interconnection between radiator and exhaust air louvers. d. Installation of mufflers and exhaust pipes and insulation of same. 2. The Installer shall be responsible for coordinating all trades to ensure the proper functioning of the entire systems including but not limited to fuel supply, exhaust equipment and air transfer system. This coordination shall include furnishing all required Project No. SPECIFICATION GUIDELINES 16620-4
information to other subcontractors regarding fuel, exhaust and cooling system dimensions, pipe and duct sizes, etc. The Installer shall furnish a dimensioned plan layout indicating all generator dimensions, roughing dimensions, piping layout, duct layout, tank locations and elevations and all required electrical wiring and interconnections. 3.02 TESTS AND START-UP A. Tests: 1. The electric generator set shall receive the manufacturer's standard testing. 2. Before acceptance of the installation, the equipment shall be tested to show it will start automatically, subjected to full load test or that load available at the job-site, shut down and reset as required in these Specifications. 3. Before acceptance, any defects that become evident during this test shall be corrected at no additional cost to the Board. B. Start-up and Instructions: 1. On completion of the installation, perform the initial start-up by a factory-trained representative of the engine supplier. 2. At the time of start-up, operating instructions and maintenance procedures shall be thoroughly explained to operating personnel. 3. Two copies of operating and maintenance instruction books shall be supplied for the electric set and such auxiliary equipment as may require same. END OF SECTION Project No. SPECIFICATION GUIDELINES 16620-5