Minneapolis Public Schools



SECTION 26 32 13ENGINE GENERATORS - GENERALSUMMARYSection Includes:Packaged 4-Cycle Natural Gas Engine-Generator SetControls and AccessoriesSYSTEM DESCRIPTIONDesign Requirements:Generator shall be sized to operate at elevations between sea level and 1,000 feet above sea level, and at ambient outdoor temperatures to minus 30 degrees F.Generator shall supply the following: All generator auxiliaries are supplied to the Generator from the Emergency Bus.Generator Auxiliaries:Remote RadiatorSupply and Exhaust Fans For Generator RoomAll Generator Room Air Supply DampersCooling Pumps For GeneratorEmergency Life Safety System Loads:Egress lighting, exit signs, and other essential loads as shown on Drawings.Operation: In the event of failure of normal power source, engine-generator unit shall automatically start and assume life safety loads within 10 seconds. When normal service is re-established, loads shall automatically transfer to normal and emergency generator unit shall stop once minimum preselected running period has been completed.Heating/Cooling Loads:Building heating and cooling units, certain pumps, fans, motors, control systems, and other selected loads as shown on Drawings.Operation: In the event of failure of normal power source, engine-generator unit shall automatically start and assume the above described loads after life safety loads have stabilized. When normal service is re-established, loads shall automatically transfer to normal and emergency generator unit shall stop once minimum preselected running period has been completed.Discretionary Equipment System Loads:Type: Certain electrical loads are connected to equipment system of generator set as shown on Drawings.Operation: Such that, after engine-generator set start, equipment system may be connected to, or disconnected from, alternate power system automaticallyLoad Shedding:Generator Overload: Prior to generator overload, load shed transfer switch shall accept a signal from the generator to the load shed transfer switch to drop load by switching to a neutral position. Generator control panel reset will allow transfer switch to reconnect to generator.Peak Control Load Transfer: Upon a signal from the energy management system, transfer switch shall start the generator and transfer loads to the generator. Retransfer shall be accomplished after receiving another signal from the energy management system.Transfer Switches: Each of the above loads shall be connected to normal power source and to generator via separate transfer switches as specified in Section 26 36 00, Transfer Switches.DEFINITIONSStandby Rating: Power output rating equal to the power the generator set delivers continuously under normally varying load factors for the duration of a power outage.Operational Bandwidth: Total variation from lowest to highest value of a parameter over the range of conditions indicated, expressed as a percentage of nominal value of the parameter.Steady-State Voltage Modulation: Uniform cyclical variation of voltage within operational bandwidth, expressed in Hertz or cycles per second.SUBMITTALSPrior Approval: Generator design and specification is based on the listed acceptable manufacturers. Prior approval submittal shall include information indicating that proposed generator will operate at specified performance level with design criteria shown on Drawings. Indicate air louver sizes, duct sizes, engine exhaust pipe size, and fuel pipe size. If the proposed generator changes work associated with installation, include a detailed list of this work in the prior approval submittal. Cost of changes to design shown on Drawings and Specification shall be borne by the Bidder. Prior approval submittals that do not contain this information will not be reviewed.Product Data: Include data on features, components, ratings, and performance. Include the following:Dimensioned Outline Plan and Elevation Drawings of Engine Generator Set, Exterior Enclosure, and Other Components SpecifiedThermal Damage Curve For GeneratorTime-Current Characteristic Curves For Generator Protective DeviceShop Drawings: Shop Drawings and catalog cuts are required as follows:Generator Set and Auxiliary Equipment:Make of EngineNumber of CylindersBore, Stroke, and Piston DisplacementCertified Generator Set Fuel Consumption CurveRated RPMBMEP at Rated KW OutputMake and Type of GeneratorGenerator Electrical Rating, KVA or KW at 0.8 Power FactorNumber and Type of BearingsExciter TypeGenerator Insulation Class and Temperature RiseEngine Manufacturer's Certified Engine BHP CurveIndicate fabrication details, dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.Vibration Isolation Base Details: Detail fabrication, including seismic restraints, anchorages, and attachments to structure and to supported equipment. Include base weights.Wiring Diagrams: Detail wiring for power and control connections, and differentiate between factory installed and field installed wiring.Qualification Data: For firms and persons specified in ”Quality Assurance“ article.Field Test and Observations Reports: Indicate and interpret test results and inspection records relative to compliance with performance requirements.Certified Summary: Summary of Prototype Unit Test Report.Sound: Sound Measurement Test Report.Maintenance Data: For each packaged engine generator and accessories to include in Maintenance Manuals specified in Section 1, include the following:Detailed Operating Instructions For Both Normal and Abnormal ConditionsQUALITY ASSURANCEManufacturer Qualifications: Maintain a service center capable of emergency maintenance and repairs at Project with 8-hour maximum response time, and submit maintenance proposal for Minneapolis Public Schools selection.Test Agency Qualifications: Test agency as defined by OSHA in 29 CFR 1910.7 or a member company of the International Electrical Testing Association, and that is acceptable to authorities having jurisdiction.Source Limitations: Obtain packaged engine generator and auxiliary components specified in this Section through (1) source from a single manufacturer.Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having ply with NFPA 70.Engine Exhaust Emissions: Comply with applicable state and local government requirements.DELIVERY, STORAGE, AND HANDLINGGeneral Requirements: Deliver engine generator set and system components to their final location in protective wrappings so as to prevent damage from dirt, moisture, and construction operations. Remove protective wrappings only after equipment is safe from such hazards.WARRANTYDescription: Manufacturer's standard warranty shall, in no event, be for a period of less than 5 years from date of Substantial Completion, and shall include repair parts, labor, reasonable travel expense necessary for jobsite, and expendables (including lubricating oil, filters, antifreeze, and other items made unusable by defect) used during the course of repair. Running hours shall not be a limiting factor for the system warranty by either the manufacturer or servicing distributor. Submittals receive without written warranties as specified will be rejected in their entirety.EXTRA MATERIALSGeneral Requirements: Furnish extra materials describe below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.Filters: One set each of lubricating oil, fuel, and combustion air filters.Paint: Provide (2) cans of touch-up paint. - PRODUCTSMANUFACTURERSAcceptable Manufacturers: Subject to compliance with requirements of the Contract Documents, provide a generator-set system by one of the following:GilletteMTUKohlerCaterpillarCumminsTests: Engine and generator shall be built and tested as a unit with a single source of responsibility.ENGINE-GENERATOR RATINGGeneral Requirements:Furnish a coordinated assembly of compatible components.Output Connections: 3 phase, 4-wire, (2) output breakers as shown on Drawings.Safety Standard: Meet requirements of ASME B15.1Nameplates: Each major system component is equipped with a conspicuous nameplate of component manufacturer. Nameplate identifies manufacturer of origin and address, model number, and serial number of item.Limiting dimensions indicated for system components are not exceeded.Output Power Ratings: Nominal ratings are indicated, with capacity as required to operate as a unit as evidenced by records of prototype testing.Skid: Adequate strength and rigidity to maintain alignment of mounted components without depending on a concrete foundation. Skid is free from sharp edges and corners. Lifting attachments are arranged to facilitate lifting with slings without damaging any components.Engine and generator shall be a direct connected skid mounted unit capable of delivering the following for:Standby Rated (Less Than 100 Hours Operation per Year)Prime Rated (Variable Loads For Unlimited Time)Continuous Duty (Utility Type Constant Load For Unlimited Time)____ KW 277/480 Volts, 3 Phase, 4-WireNatural Gas Fueled, Turbo-Charged, After CooledENGINEType: 4-stroke, maximum 1,800 RPM rated, liquid cooled internal combustion in-line or V-type engine.Lubrication: Pressurized oil by a positive displacement pump driven from engine crankshaft to all mechanical components, including pistons and main bearings, wrist pins, gears, camshafts, bearings, and valve rocker mechanisms. Provide the following features:Gear Type Oil Pump With Full-Flow Replaceable Cartridge Oil FiltersSpring Load Bypass Valve, to allow oil flow in event of clogged filtersIsochronous GovernorDry Type Air Cleaner With Service Indicator24 Volt Automatic Starting SystemFilter and Strainer: Rated to remove 90 percent of particles 5 micrometers and smaller while passing full flow.Thermostatic Control Valve: Controls flow in system to maintain optimum oil temperature. Unit is capable of full flow and is designed to be fail-safe.Crankcase Drain: Arranged for complete gravity drainage to an easily removable container with no disassembly and without use of pumps, siphons, special tools, or appliances.Rating: Available KW at rated voltage shall be after operating all engine-generator mechanical and electrical accessories.Voltage regulator shall be of static electronic type with built-in voltage adjusting rheostat to provide 10 percent voltage adjustment.Steady state modulation shall be maintained at 1/2 percent with 1 percent of rated voltage for any constant load between no load and rated load.Random Voltage Variation: Cyclic variations in RMS voltage shall not exceed plus or minus 1 percent of rated for constant loads from no load to rated load, with constant ambient and operating temperature.Frequency regulation shall be 2.5 percent from steady state no load to steady state rated load.Random Frequency Variation: Speed variations for constant loads from no load to rated load shall not exceed plus or minus 2.5 percent of rated speed, with constant ambient and operating temperature.Total Harmonic Distortion: Sum of AC voltage waveform harmonics, from no load to full linear load, shall not exceed 5 percent of rated voltage (L-N, L-L, L-L-L) and no single harmonic shall exceed 3 percent of rated voltage.Telephone Influence Factor: TIF shall be less than 50 in accordance with NEMA MG1-22-43.Engine-generator set shall be capable of picking up 100 percent of nameplate KW, less applicable derating factors, in (1) step with engine-generator set at operating temperature, in accordance with NFPA Standard 110, Paragraph 5-13.2.6.Enclosure:Walk in, standard vandal resistant, weatherproof protective enclosure (with winter louver package), wind resistant up to 100 mph.Heavy gauge steel; painted to standard color as selected by Architect.Lockable, gasketed doors and fuel/radiator fill.Multiple panels lockable and provide adequate access to components requiring maintenance. Panel removable by (1) person without tools.Insulate enclosure as required to maintain interior temperature within limits prescribed by NFPA 110 for Level 1 system.Space Heater; thermostatically controlled operating at 1/2 or less rated voltage size to prevent condensation.Convenience receptacle.Ambient capability of 110 degrees F.Sound attenuation level of 75 dB at 10 feet.Walk-in enclosures (when specified) shall include lights, heaters, dampers, and motorized louvers equipped with rodent/insect screen and filter arranged to permit air circulation when engine is not running while excluding dust and rodents.Provide integral factory wired NEMA 3R, 100 amp main breaker, 120/208 volt, 3 phase, 4-wire, 24-circuit panel to power lights, battery charger, engine block heaters, enclosure heaters, and other electrical components. Contractor shall make a single point, 100 amp connection to main breaker in panel.Natural Gas Fuel System:In accordance with NFPA 37. System includes the following:Main Fuel Pump: Mounted on engine. Pump ensures adequate primary fuel flow under starting and load conditions.Relief/Bypass Valve: Automatically regulates pressure in fuel line and returns excess fuel to source.Engine Exhaust System:Muffler: Super critical, sized as recommended by engine manufacturer. Measured sound level, at a distance of 10 feet from exhaust discharge, is 80 dBA or less.Condensate Drain for Muffler: Schedule 40, black steel pipe connected to muffler drain outlet through a petcock.Connection From Engine to Exhaust System: Flexible section of corrugated stainless steel pipe.Connection From Exhaust Pipe to Muffler: Stainless steel expansion joint with liners.Engine Cooling System:Description: Closed loop, liquid cooled, with radiator factory mounted on engine generator set skid and integral engine-driven coolant pump.Radiator: Rated for specified coolant.Radiator Core Tubes: Non-ferrous metal construction other than aluminum.Fan: Driven by multiple belts from engine shaft.Coolant: Solution of 50 percent ethylene-glycol based antifreeze and 50 percent water, with anti-corrosion additives as recommended by engine manufacturer.Temperature Control: Self-contained, thermostatic-control valve modulates coolant flow automatically to maintain optimum constant coolant temperature as recommended by engine manufacturer.Coolant Hose: Flexible assembly with inside surface of nonporous rubber and outer covering of aging ultraviolet and abrasion resistant fabric.Rating: 50 psig (345-kPa) maximum working pressure with 180 degree F (82 degree C) cool and non-collapsible under vacuum.End Fittings: Flanges or steel pipe nipples with clamps to suit piping and equipment connections.Coolant Jacket Heater: Electric-immersion type, factory installed in coolant jacket system, meeting NFPA 110 requirements for Level 1 equipment.Warning Sign:Provide a permanently attached, red laminated warning sign with 1-inch letters at the electric service main as follows: "WARNING! BACKFEED POSSIBLE! EMERGENCY POWER IS PROVIDED IN THIS BUILDING! EMERGENCY POWER UNIT IS LOCATED AT _______________________________________." Contractor shall identify area where unit is located. Use Owner-designated room number.GENERATOR, EXCITER, AND VOLTAGE REGULATORGeneral Requirements: Generator, exciter, and regulator shall be factory wired and tested as a complete unit:Unit shall be of brushless construction using a 3 phase, 1/2 wave rotating rectifier assembly with hermetically sealed, metallic type silicon diodes to supply main field excitation. Unit construction shall allow removal of all or any part of exciter without disassembly of generator. A surge suppressor shall be connected across rotating diode network to protect them from transient conditions.Unit shall be fully guarded and drip-proof in accordance with NEMA MGI-1.25. Entire insulation system shall be of Class H or F or better insulation, and shall be of synthetic non-hygroscopic materials. Stator winding shall be given (3) dips and bakes, and brought out to terminal box to permit future reconnection for other voltages if required. Temperature rise shall be within NEMA MG-1-22.40 (125 percent of rating) for all nameplate voltages and at 110 percent of rated full loads. Amortisseur winding will be die cast aluminum or copper bars with continuous end plates.Bearings shall be anti-friction type with provisions for adding or changing grease through grease-ways extended to generator exterior. Generator shall be self-ventilated and shall use a 1-piece, cast aluminum alloy internal fan for high volume, low noise air delivery.Main rotating field shall consist of 1-piece, 4-pole laminations. Laminations shall be shrink fit and keyed to shaft. Dovetails, cross bolts, and other pole to shaft connection means are not acceptable. Rotating field shall be layer wound with thermosetting epoxy between each layer and over complete winding. Rotor shall be dynamically balanced up to 25 percent over-speed.Generator construction will allow connection to load through top, bottom or either side of junction box.Instrument Transformers: Mounted within generator enclosure.Voltage Regulator: Solid-state type, separate from exciter, providing performance as specified.Adjusting rheostat on control and monitoring panel provides plus or minus 5 percent adjustment of output voltage operating band.Strip Heater: Thermostatically controlled unit arranged to maintain stator windings above dewpoint.Generator Set Performance:Over-sizing generator compared with the rated power output of the engine to meet performance requirements in paragraphs below is permissible.Nameplate Data for Over-Sized Generator: Show ratings required by Contract Documents rather than ratings that would normally be applied to generator size installed.Steady-State Voltage Operational Bandwidth: Percentage of rated output voltage from no load to full load.Steady-State Voltage Modulation Frequency: Less than 1 Hz.Transient Voltage Performance: Not more than 20 percent variation for 50 percent step-load increase or decrease. Voltage recovers to remain within the steady-state operating band within 3 seconds.Steady-State Frequency Operational Bandwidth: 0.5 percent of rated frequency from no load to full load.Steady-State Frequency Stability: When system is operating at any constant load within rated load, there are no random speed variations outside the steady-state operational band and no hunting or surging of speed.Transient Frequency Performance: Less than 5 percent variation for 50 percent step-load increase or decrease. Frequency recovers to remain within the steady-state operating band within 5 seconds.Output Waveform: At no load, harmonic content measured line-to-line or line-to-neutral does not exceed 5 percent total and 3 percent for single harmonics. Telephone influence factor, determined in accordance with NEMA MG-1, shall not exceed 50.Sustained Short-Circuit Current: For a 3 phase, bolted short circuit at system output terminals, system will supply a minimum of 250 percent of rated full-load current for not less than 10 seconds and then clear the fault automatically, without damage to any generator components.Start Time: Meet NFPA 110, Type 10, system requirements.SERVICE CONDITIONSEnvironmental Conditions: Engine generator system withstands the following environmental conditions without mechanical or electrical damage or degradation of performance capability:Ambient Temperature: Minus 30 Degrees C to Plus 40 Degrees CRelative Humidity: 0 to 95 PercentAltitude: Sea Level to 1,000 FeetSecurity: High state of security for exterior enclosure.CONTROLS AND ACCESSORIESGeneral Requirements: Provide a generator mounted control panel for complete control and monitoring of engine and generator set functions. Panel shall include automatic start/stop operation, adjustable cycle cranking, digital AC metering (0.5 percent true RMS accuracy) with phase selector switch, digital engine monitoring, shutdown sensors and alarms with horn and reset, adjustable cool-down timer, and emergency stop pushbutton. Panel shall incorporate self-diagnostics capability and fault logging. Critical components shall be environmentally sealed to protect against failure from moisture and dirt. Components shall be housed in a NEMA 1/IP22 enclosure with hinged plete engine control which operates on closing contact and stop control which operates on opening contact. A crank limiter shall be provided to open starting circuit in approximately 45 seconds if plant is not started within that time. Electric plant controls shall include a 3-position selector switch with the following positions: RUN-STOP-REMOTE. High water temperature, low level pressure, and over-speed shutdown signal light and alarm terminals shall be provided.Engine Accessories:Remote Radiator With Guard and Roof Mounting Curb and Frame3 Phase Coolant Pump and Controls; as required to provide proper circulation to remote radiator3 Phase Circuit Breaker and Feeder Transfer Switch; for emergency system to operate pumpInitial Fill of Lubricating OilAnti-Freeze Solution of 50 Percent Ethylene GlycolLube Oil Cooler24 Volt Automatic Starting System and BatteriesBattery Rack and Battery CablesEngine Mounted Battery Charger Complete With Float, Taper, and Equalize Settings; unit shall be hard wired to an emergency 120 volt panelboard and shall have contacts for remote annunciator indications (see remote alarm annunciator).Engine Mounted Battery Charging Generator and RegulatorExhaust Silencer; residential type with flexible seamless stainless steel connectionAir-Intake SilencersExhaust PipingRadiatorFlexible Exhaust Fitting; in accordance with manufacturer's recommendationsFlexible Fuel Line FittingsEngine Jacket Water Heater: 3,000 Watt MinimumRelay to Control Combustion Air DamperStart/Stop Control From Fire Pump Controller/ATS and Building ATSStaring BatteryGenerator Accessories:Parallel Main Line Circuit Breakers Installed and Connected from Main Generator Bus; refer to Drawings for sizesVoltage Adjustment Via Rheostat; voltage regulator to maintain voltage within plus or minus 2 percentLoad Bank TestOutdoor Enclosure and Drop-Over Enclosure for SecurityCustom Enclosure Color Without LogoDigital Readouts:Engine Oil PressureCoolant TemperatureEngine RPMSystem DC VoltsEngine Running HoursGenerator AC VoltsGenerator AC AmpsGenerator FrequencyKW MeterPercentage of Rated PowerKVA MeterKVAR MeterPower Factor MeterKWHR MeterVIBRATION ISOLATORSGeneral Requirements: Spring type vibration isolators shall be provided between engine-generator set and concrete base.REMOTE ALARM ANNUNCIATORGeneral Requirements: Provide (1) audible and visual alarm panel, for engine malfunction, to be installed in maintenance office. Alarm panel shall be flush in wall type and contain alarm signals listed below, and meet requirements of NFPA 110.High Battery Voltage - Visual SignalLow Battery Voltage - Visual SignalBattery Charger Malfunction - Visual SignalGenerator Running - Visual SignalNormal Utility Power - Visual SignalEps Supplying Load - Visual SignalPre-Low Oil Pressure - Audible and Visual AlarmPre-High Coolant Temperature - Audible and Visual AlarmHigh Coolant Temperature - Audible and Visual AlarmLow Engine Temperature - Audible and Visual AlarmOverspeed - Audible and Visual AlarmOvercrank - Audible and Visual AlarmNot in Auto - Audible and Visual AlarmSilence-Lamp Test - Audible and Visual AlarmSTARTING SYSTEMDescription: 24 volt electric, with negative ground and including the following items:Components: Sized so they will not be damaged during a full engine-cranking cycle at maximum specified ambient temperature.Cranking Motor: Heavy-duty unit that automatically engages and releases from engine flywheel without binding.Cranking Cycle: As required by NFPA 110 for system level specified.Battery: Adequate capacity within ambient temperature range to provide specified cranking cycle at least twice without recharging.Battery Compartment: Factory fabricated of metal with acid resistant finish and thermal insulation. Thermostatically controlled heater is arranged to maintain battery above 10 degrees C regardless of external ambient temperature.Battery Charging Alternator: Factory mounted on engine with solid state voltage regulation and 35A minimum continuous rating.Battery Charger: Current-limiting, automatic equalizing, and float-charging type. Unit complies with UL 1236 and includes the following features:Operation: Equalizing-charging rate of 10A is initiated automatically after battery has lost charge until an adjustable equalizing voltage is achieved at battery terminals. Unit then automatically switches to a lower float-charging mode and continues operating in that mode until battery is discharged again.Automatic Temperature Compensation: Adjusts float and equalizes voltage for variations in ambient temperature from minus 40 degrees C to plus 60 degrees C to prevent overcharging at high temperatures and undercharging at low temperatures.Automatic Voltage Regulation: Maintains output voltage constant regardless of input voltage variations up to plus or minus 10 percent.Ammeter and Voltmeter: Flush mounted in door. Meters indicate charging rates.Safety Functions: Include sensing of abnormally low battery voltage arranged to close contact providing low battery voltage indication on control and monitoring panel. Include sensing of high battery voltage and loss of AC input or DC output of battery charger. Either condition closes contacts that provide battery charger malfunction indication at system control and monitoring panel.Enclosure and Mounting: NEMA 250, Type 1, wall mounted cabinet.GENERATOR OVERCURRENT AND FAULT PROTECTIONGenerator Circuit Breakers: Molded case, thermal-magnetic type, 100 percent rated, meeting requirements of NEMA AB1 and UL 489.Tripping Characteristics: Designed specifically for generator protection.Trip Rating: (1) circuit breaker at 100A 3 phase and (1) at 60A, 3 phase.Mounting: Adjacent to or integrated with control and monitoring panel.Generator Protector: Microprocessor based unit that continuously monitors current level in each phase of generator output, integrates generator heating effect over time, and predicts when thermal damage of the alternator will occur. When signaled by the protector or other generator-set protective devices, a shunt-trip device in generator disconnect switch shall open switch to disconnect generator from load circuits. Protector performs the following functions:Initiates a generator overload alarm when generator has operated at an overload equivalent to 110 percent of full-rated load for 60 seconds. Indication for this alarm is integrated with other generator-set malfunction alarms.Under single phase or 3 phase fault conditions, regulates generator to 300 percent of rated full-load current for up to 10 seconds.As heating effect on generator of overcurrent approaches the thermal damage point of unit, protector switches excitation system off, opens generator disconnect switch, and shuts down generator set.Senses clearing of a fault by other overcurrent devices and controls recovery of rated voltage to avoid over-shoot.SOURCE QUALITY CONTROLPrototype Testing: Performed on a separate engine generator set using same engine model constructed of identical or equivalent components and equipped with identical or equivalent accessories.Tests: In accordance with requirements for Level 1 energy converters in Paragraphs 3.2.1, 3.2.2.2, and 3.2.1.2 of NFPA 110.Generator Tests: In accordance with IEEE ponents and Accessories: Items furnished with installed unit that are not identical to those on tested prototype have been tested to demonstrate compatibility and reliability. - EXECUTIONINSTALLATIONGenerator-Set: Electrical Contractor shall provide a raised concrete pad as specified by the generator manufacturer. Generator-set shall be mounted on spring-type vibration isolators, Kenetics SM or equal, subject to compliance with requirements of the Contract Documents. Make all electrical connections to associated equipment, including generator, water heater, batteries, battery charger, electric valves, and solenoid controls. Transfer from one system to the other shall be automatic as specified.Fuel System: Electrical Contractor shall provide all required equipment, valves, filters, flexible lines, and other components as required. All fuel piping is furnished and installed by Mechanical Division up to the engine location. Electrical Contractor shall provide final connections.Provide initial fill of recommended grade fuel.Exhaust System: Electrical Contractor shall provide all materials. Mechanical Contractor shall provide piping and installation labor.FIELD QUALITY CONTROLTests:Contractor shall be responsible for making all running tests on emergency units to ensure that units are turned over to Owner in perfect operating condition. Prior to acceptance of engine-generator set, unit shall be tested to show it is free of defects and will operate properly by subjecting unit to a full load bank, at unity power factor, tested for (4) hours at site. Test shall be witnessed by Owner and Architect/Engineer and shall simulate a power failure, including operation of transfer switch, automatic starting, automatic shutdown, and return to normal. Contractor shall record the following in 20-minute intervals during the 4-hour test:KilowattsAmperesVoltageCoolant TemperatureRoom TemperatureFrequencyOil PressureIf engine-generator unit does not pass field load bank test to the satisfaction of Owner or Engineer, the unit shall be replaced at no additional cost. Tests shall be repeated as many times as necessary with no additional charges to the Owner.EXAMINATIONGeneral Requirements:Examine areas, equipment foundations, and conditions, with installer present, for compliance with requirements for installation and other conditions affecting packaged engine generator performance.Proceed with installation only after unsatisfactory conditions have been corrected.Examine roughing-in of cooling system piping and electrical connections. Verify actual locations of connections before packaged engine generator installation.CONCRETE BASESGeneral Requirements: Install concrete bases of dimensions indicated for packaged engine generators. Coordinate with General Contractor.CLEANINGGeneral Requirements: Upon completion of installation, inspect system components. Remove paint splatters and spots, dirt, and debris. Repair damaged finish to match original finish. Clean components internally using methods and materials recommended by manufacturer.DEMONSTRATIONGeneral Requirements: Manufacturer shall provide training to the School Board Electrician on the installation and service of all equipment herein specified. Training shall be provided for a minimum of 16 hours for (4) persons at no cost to the Owner. Training shall be provided by manufacturer of equipment.Train Owner’s maintenance personnel to adjust, operate, and maintain packaged engine generators as specified below:Coordinate this training with that for transfer switches.Train Owner’s maintenance personnel on procedures and schedules for starting and stopping, troubleshooting, servicing, and maintain equipment.Schedule training with Owner, through Architect, with at least 7 days advance notice.END OF SECTION 26 32 13 ................
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