SECTION VIII (Sub-Section 472) Diesel Engine Driven Generator With Weatherproof Enclosure Article Page 1. General 472-1 thru 472-8 2. Products 472-8 thru 472-23 3. Execution 472-23 thru 472-25 4.
DIESEL ENGINE DRIVEN GENERATOR WITH WEATHERPROOF ENCLOSURE SUB-SECTION 472 1.0 GENERAL 1.1 SCOPE OF WORK 1.1.1 Furnish all labor, materials, equipment, and incidentals required to install, put into operation, and field test the weatherproof diesel engine driven generator units and appurtenances as shown on the Drawings and specified herein. 1.1.
1.3 QUALIFICATIONS 1.3.1 The engine-generator set shall be the standard product, as modified by these specifications, of a MANUFACTURER regularly engaged in the production of this type of equipment. The unit to be furnished shall be of proven ability and shall be designed, constructed, and installed in accordance with best practices and methods.
1.3.6 All materials and parts comprising the unit shall be new and unused, of current manufacture, and of the highest grade, free from all defects of imperfections. Workmanship shall conform to the best modern practices. Only new and current models will be considered. The unit offered under these Specifications shall be the product of a firm regularly engaged in the production of enginegenerator equipment and shall meet the requirements of the Specifications set forth herein.
1.4.4.2 A. B. C. D. E. F. G. H. I. J. K. 1.4.4.3 A. B. C. D. E. F. G.
1.4.4.4.2 Legends for all devices on all diagrams. 1.4.4.4.3 Sequence of operation explanations for all portions of all schematic wiring diagrams. 1.4.5 Engine/Generator Unit and Weatherproof Enclosure: Dimensional data shall be given for the Engine/Generator set and for the weatherproof enclosure. a. b. c. d. e. f. g. h. i. j. k.
1.4.11 Submit to the ENGINEER the written warranty as required in Paragraph 3.06 below. 1.5 TESTING: To assure that the equipment has been designed and built to the highest reliability and quality standards, the manufacturer and local representative shall be responsible for three separate tests: design prototype tests, final production tests, and site tests. 1.5.
1.5.2 Final Production Tests: Each generator set shall be tested under varying loads with guards and exhaust system in place. Tests shall include: 1.5.1.1 1.5.1.2 1.5.1.3 Transient and steady-state governing. Safety shutdown device testing. Voltage regulation. 1.5.1.4 Rated power. 1.5.1.5 Maximum power. 1.5.1.6 Upon request, arrangements to either witness this test will be made, or a certified test record will be sent prior to shipment. 1.5.
1.6 SPECIAL TOOLS AND SPARE PARTS 1.6.1 Furnish one (1) set of all special tools required for normal operation and maintenance of the equipment being furnished. Furnish suitable tool chests complete with locks and duplicate keys 1.6.2 The MANUFACTURER shall furnish two (2) complete spare replacement sets of all filter elements required for each generator unit. 2.0 PRODUCTS 2.1 RATINGS 2.1.
2.2.2 The engine shall be capable of satisfactory performance on No. 2 fuel oil (ASTM Designation D396). Diesel engines requiring a premium fuel will not be considered. 2.2.3 The engine shall be capable of operating at light loads for extended periods of time and shall provide a means to reduce carbonization. Periodic cleaning of exhaust ports shall not be required. 2.2.
2.2.8 The engine shall be provided with removable wet-type cylinder liners of close grained alloy iron, heat treated for proper hardness as required for maximum liner life. The cylinder block shall be a one piece stress relieved gray iron casting. 2.2.9 The engine shall have a gear-type lubricating oil pump for supplying oil under pressure to main bearings, crank pin bearings, pistons, piston pins, timing gears, camshaft bearings, valve rocker mechanism and governor.
2.3.3 Provide one (1) or two (2) unit mounted thermal circulation type water heaters incorporating a thermostatic switch shall be furnished to maintain engine jacket water at minimum of 70 degrees F. The heaters shall be 240 volt, single phase, 60 Hertz, size as required to achieve above noted ambient. 2.3.4 The expansion tank of the radiator shall be fitted with a low water level switch and wired into safety shutdown system of the unit. 2.4 GENERATOR, EXCITER AND ACCESSORIES 2.4.
2.4.3.3 Generator stator and exciter stator windings shall be a full Class H insulated system vacuum impregnated with epoxy resin which after curing shall have additional treatment epoxy for resistance to an environment of moisture and salt air. Generator coils shall be random or machine wound, and precision made, with turn-to-turn and ground insulation of glass yard and mica materials.
2.4.5.1 Voltage Regulator: 2.4.5.1.1 The generator MANUFACTURER shall furnish a hermetically sealed, silicon controlled rectifier type voltage regulator employing a zener reference with a +1 regulation for the generator. The regulator shall include a 3-phase voltage sensing, automatic short circuit protection and shall include automatic under-frequency protection to allow the generator to operate at no load less than synchronous speed for engine start-up and shutdown procedures.
2.6 WEATHER-PROTECTIVE ENCLOSURE 2.6.1 The intent of this Specification is to provide a weatherproof type generator set enclosure complete in every detail and requiring no additional in-field modifications or assembly, except where specifically allowed by these Specifications.
2.6.2.4 Components – All component s of the enclosure shall be assembled utilizing 0.375-inch minimum stainless steel bolts, nuts, and lock washers. In addition, watertight neoprene flat washers shall be used on all roof bolts. 2.6.2.5 The MANUFACTURER of the enclosures shall provide mounting brackets for the exhaust silencer specified. In addition, a tail pipe extension shall be provided, terminating in a horizontal plane and cut at a 45º angle to prevent the entrance of the water.
2.7 2.6.2.9.1 Rain dress for exhaust pipe and tail pipe extension. Rain dress shall prevent the entrance of rain and allow the expansion and vibration of the exhaust piping without stress to the exhaust system. Rain dress shall be stainless steel and provided by the enclosure supplier. 2.6.2.9.2 Coordination between CONTRACTOR and Supplier is mandatory and the equipment Supplier’s instructions will be adhered to without exception. FUEL SYSTEM 2.7.
2.7.4 Base Tank – The unit shall be equipped with a double wall in-base fuel tank and shall be supplied with a lockable, exterior located fill cap. All necessary fuel and vent lines for proper engine performance shall be provided as well as a means to readily detect the fuel level in the tank without the use of a measuring stick. Fuel tanks to be sized as follows: Furnish a 200-gallon minimum capacity. 2.7.
2.9 AUTOMATIC STARTING SYSTEM 2.9.1 Starting Motor – A DC electric starting system with positive engagement shall be furnished for the generator. The motor voltage shall be 24 volts. 2.9.2 Automatic Control – Fully automatic engine start-stop controls in the generator control panel shall be provided. Controls shall provide shutdown for low oil pressure, high water temperature, overspeed, overcrank, and loss of engine coolant.
2.10 MAIN LINE CIRCUIT BREAKER 2.10.1 Type – Main line, molded case circuit breaker mounted upon and sized to the output of the generator shall be installed as a load circuit interrupting and protection device. It shall operate both manually for normal switching functions and automatically during overload and short circuit conditions. 2.10.
2.11.1.5 Automatic starting controls as previously specified. 2.11.1.6 Voltage level adjustment rheostat with locking knob 2.11.1.7 Dry contacts for remote alarms wired to terminal strips. 2.11.1.8 Six (6) individual fault indicator lights for fuel tank leak, low oil pressure, high water temperature, overspeed, overcrank, and low water level. All lights to be pressed-to-test type, 1” diameter. 2.11.1.9 Four (4) position function switch marked “auto”, “manual” , “off/reset”, and “stop”. 2.11.1.
2.11.4 Timing Functions – All control panel timing functions shall be accomplished by metal encased, solid-state, plug-in timing relays with 2PDT output contacts rated for ten (10) amperes. All solidstate time delay relays shall be reverse polarity protected and shall not function or be damaged by the application of improper polarity. Open printed circuit board type time delay circuits will not be accepted. 2.11.5 Control Relays – All control relays shall be the 3PDT plug-in type with .
2.12.4 The transfer switch shall be listed under U.L. 1008, in NEMA 1 enclosure, as manufactured by Lexington Switch and Controls, Inc., Lebanon, Ohio, Westinghouse, ONAN, or approved equal. 2.12.5 Accessories – The automatic load transfer switch specified shall include the following accessories: 2.12.5.1 Full phase protection. Solid-state phase monitor shall be field adjustable, close differential type, with 85100% pick-up and 75-98% drop-out. A single adjustment shall set phases. 2.12.5.
3.0 2.12.5.11 Engine starting contacts to provide for generator starting from each unit independent of the other. 2.12.5.12 One (1) auxiliary S.P.D.T. contact on emergency breaker and one (1) S.P.D.T. auxiliary contact on normal breaker. 2.12.5.13 Plant exerciser to start and run the generator set with or without load (in-field switchable) each of 168 hours for a 30 minute interval. 2.12.5.14 Four (4) position mode selector switch marked “test”, “auto”, “off”, and “engine start:. 2.12.5.
3.2 PAINTING 3.2.1 The engine generator set and associated equipment shall be shop primed and finish coated in accordance with the Manufacturer’s standard factory load test prior to shipment. 3.3 TESTING 3.3.1 The engine-generator set shall be given the Manufacturer’s standard factory load test prior to shipment. 3.3.
3.5 WARRANTY 3.5.1 Equipment furnished under this Section shall be guaranteed against defective parts and workmanship under terms of the Manufacturer’s and dealer’s warranty. But, in no event, shall it be for a period of less than five (5) years (comprehensive) from date of initial start-up of the system and shall include labor, parts and travel time for necessary repairs at the job site.
