Generac Power Systems 004917-3 owner manual Generator, Transfer Switch, Automatic System Operation

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Section 1 - General Information

QUIETSOURCELiquid-cooled 30 kW Generators

1.1GENERATOR

This equipment is a liquid-cooled, engine-driven gen- erator set. The generator is designed to supply elec- trical power that operates critical electrical loads during utility power failure. The unit has been facto- ry-installed in a weather resistant, all aluminum enclosure and is intended for outdoor installation only. Use this generator as a source of electrical power for the operation of 120 and/or 240VAC, sin- gle-phase loads.

If this generator is used to power electrical load

!circuits normally powered by a UTILITY power source, it is required by code to install a trans- fer switch. The transfer switch must effectively isolate the electric system from the utility distri- bution system when the generator is operating (NEC 701). Failure to isolate an electrical system by such means results in damage to the genera- tor and may also result in injury or even death to utility power workers due to backfeed of electrical energy.

1.2TRANSFER SWITCH

This generator system may include a matched auto- matic transfer switch which is intended to be used in conjunction with the Generac generator. It is supplied in either a NEMA 1 enclosure or a NEMA 3R enclo- sure. The NEMA 1 enclosure is intended for indoor use only. The NEMA 3R enclosure is weather proof and can be used indoors or outdoors. Follow these rules:

Install the transfer switch on a firm, sturdy sup- porting structure.

To prevent switch distortion, level the switch if nec- essary. This can be done by placing washers between the switch enclosure and the mounting surface.

Never install the switch where water or any corro- sive substance might drip onto the enclosure.

Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and cor- rosive vapors.

If a transfer switch is not included, one may be pur- chased separately from a Generac Authorized Dealer.

1.3AUTOMATIC SYSTEM OPERATION

When this generator, along with a transfer switch, has been installed and interconnected, a circuit board in the generator panel constantly monitors UTILITY power source voltage. Should that voltage drop below a preset value, and remain at such a low state for a preset amount of time, the generator cranks and starts. After the generator starts, the transfer switch transfers load circuits so the generator can power them.

When utility source voltage has been restored, the switch re-transfers back to the UTILITY source volt- age and the generator then shuts down.

Please reference the transfer switch manual for spe- cific information.

1.4GENERATOR AC CONNECTION

SYSTEMS

The generator was shipped from the factory with its stator AC output leads connected in a single-phase, three-wire generator AC connection system (Figure 1.1). The stator assembly in this system consists of a pair of stationary windings, with two leads brought out of each winding. Each single winding can supply 120VAC, 60 Hertz. When the two windings are con- nected in series, a 240VAC, 60 Hertz AC output results. Typically the two HOT leads in the circuit are wires 11 and 44. The NEUTRAL leads are the junc- tion of Wires 22 and 33. The NEUTRAL is not grounded.

Figure 1.1 - Generator AC Connection System

1.5MAIN CIRCUIT BREAKER

The generator’s main circuit breaker is included with the unit as shipped from the factory. The breaker for each unit is described in Figure 1.2.

Figure 1.2 - Main Circuit Breaker

Model

Rating

Phase

Actual Current

C/B Rating*

Circuit Breaker

004917-3

27,000 NG

1

112.5

150

150A QN2

 

30,000 LP

1

125.0

150

150A QN2

 

 

* Amp Rating of C/B structured under model.

 

4 Generac® Power Systems, Inc.

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Contents Installation ‹ HOW to Obtain Service Authorized Service Dealer Location‹ Operation and Maintenance IntroductionTable of Contents General Hazards Electrical Hazards Automatic System Operation Transfer SwitchGenerator Generator AC Connection Systems‹ 1.7.3 LOW Coolant Level Switch ‹ 1.7.2 High Coolant Temperature Switch‹ 1.7.1 LOW OIL Pressure Switch Generator Fuel SystemUnpacking Lifting the Generator‹ 1.10.1 Generator Specifications SpecificationsReconfiguring the Fuel System ‹ 1.10.2 Engine SpecificationsEngine OIL Recommendations Torque SpecificationsBefore Installation Coolant RecommendationsBasic Standby Electric System Generator LocationGenerator Mounting Support ‹ 2.1.1 Nfpa StandardsGrounding the Generator Emergency Circuit Isolation MethodTotal Circuit Isolation Method Generator AC Neutral Connections‹ 2.9.1 PRE-PACKAGED ATS Transfer Switch Signal ConnectionsBattery Installation ‹ 2.9.2 GTS-TYPE ATSPreparation Before START-UP Control Console Components Using a Standard GTS Transfer Switch‹ 3.2.1 AUTO/OFF/MANUAL Switch ‹ 2.11.7 Electrical System‹ 3.2.5 SET Exercise Time Switch Manual Transfer START-UP Engine Governor Adjustments‹ 3.2.2 Fault Indicator LED ‹ 3.2.4 4 AMP Inline FuseRetransfer and Shutdown Automatic OperationWeekly Exercise Cycle Overload Protection for Engine DC Electrical System Checking Fluid LevelsCooling System ‹ 4.5.1 Check Engine OIL Level ‹ 4.5.2 Check Battery‹ 4.4.3 Engine Coolant ‹ 4.5.3 Exercise System‹ 4.6.1 Cleaning the Generator Miscellaneous Maintenance‹ 4.5.11 Changing the Engine AIR Cleaner ‹ 4.5.13 Coolant Change‹ 4.6.2 Battery ‹ 4.6.3 Battery Maintenance‹ 4.6.4 Battery Replacement Scheduled Maintenance Service Maintenance Interval InformationLevel Maintenance Level Troubleshooting Points Problem Cause CorrectionCustomer Connection PCB J2 BCW LOS WLS HCT Starter Carrier Bolt Battery Post Cover RED + Boot Battery CableBattery Post Cover Baclk Hold Down BatteryDetail Duct Intake MID AL Assy GRD Wire 99HSBASSEMBLY,BASE-DOOR Ground Wire Duct Discharge RH ALGenerac Power Systems, Inc Decal AVR Cover Assy 2A 12V UL BatteryControl BOX HSB Cover Front Panel HSB61 24 Coil Ignition 3.0L Ford Wire SET 3.0L Ford notNot SHOWN-USED to Hold OIL Drain Assembly Bracket DC ALT 3.0L FordFrame Venturi 3.0L Ford HSB Tank Coolant RecoveryRadiator R-IN,L-OUT Side Support Radiator HSBTo B Assy Regulator 3.0L NG or LPV Weldment Mounting BaseFlange Fuel Inlet Washer Flat 5/16 ZincLocktight Rotor 390 25KW 1P Direct HSB 2.5L Ford Rotor 390 15KW 1P Direct HSB 2.5L FordRotor 390 20KW 1P Direct HSB 2.5L Ford Rotor 39030AD1 HSB TecumWasher Lock 3/8 SS Exhaust Flange 2 PipeOUT Pipe Muffler OUTTube AIR Intake 3.0L Ford Element AIR CleanerCover AIR Cleaner Washer Flat M5Installation Diagram Quietsource Liquid-cooled 30 kW Generators This Warranty Shall not Apply to the Following