Generac 004188-1 Generator, Transfer Switch, Automatic System Operation, Main Circuit Breaker

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Section 1 - General Information

Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators

GENERATOR

This equipment is a liquid-cooled, engine-driven gener- ator set. The generator is designed to supply electrical power that operates critical electrical loads during util- ity power failure. The unit has been factory-installed in a weather resistant, all metal enclosure and is intended for outdoor installation only. Use this generator as a source of electrical power for the operation of 120 and/or 240 volts, single phase loads.

These models are available. They are rated as follows:

Model 004188: Provides 15,000 watts (15 kW) of 1 phase power.

Model 004189: Provides 15,000 watts (15 kW) of 1 phase power.

Model 004370: Provides 20,000 watts (20 kW) of 1-phase power.

Model 004371: Provides 20,000 watts (20 kW) of 1-phase power.

Model 004474: Provides 25,000 watts (25 kW) of 1 phase power.

Model 004475: Provides 25,000 watts (25 kW) of 1 phase power.

If this generator is used to power electrical load circuits normally powered by a utility power source, you are required by code to install a transfer switch. The transfer switch must effec- tively isolate the electric system from the utility distribution system when the generator is oper- ating (NEC 701). Failure to isolate an electrical system by such means results in damage to the generator and may also result in injury or even death to utility power workers due to backfeed of electrical energy.

TRANSFER SWITCH

This Guardian system includes a matched automatic transfer switch which is intended to be used in con- junction with your Guardian generator. It is supplied in either a NEMA 1 enclosure (15 kW models 004188, and 004189, and 20 kW models 004370, and 004371) or a NEMA 3R enclosure (25 kW models 004474 and 004475). 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 support- ing structure.

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

•Never install the switch where water or any corrosive substance might drip onto the enclosure.

•Protect the switch at all times against excessive mois- ture, dust, dirt, lint, construction grit and corrosive vapors.

AUTOMATIC SYSTEM OPERATION

When this generator, along with its 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 voltage and the generator then shuts down.

GENERATOR AC CONNECTION SYSTEMS

The generator was shipped from the factory with its sta- tor AC output leads connected in a single-phase, 3-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 120 volts AC, 60 Hertz. When the two windings are connected in series, a 240 volts, 60 Hertz AC output results. Typically the two “hot” leads in the circuit are Wires No. 11 and 44. The “Neutral” leads are the junction of Wires 22 and 33.

Figure 1.1 - Generator AC Connection System

MAIN 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 at the top of page 5.

GENERATOR FUEL SYSTEM

Your unit has been factory tested and adjusted using a natural gas fuel system. If propane (LP) gas is preferred, contact an authorized service dealer.

4 Generac® Power Systems, Inc.

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Contents Power SYSTEMS, INC HOW to Obtain Service Authorized Service Dealer LocationOperation and Maintenance IntroductionIntroduction IFC Safety Rules General Hazards Electrical Hazards Automatic System Operation Transfer SwitchGenerator Generator AC Connection SystemsLOW Coolant Level Switch High Coolant Temperature SwitchLOW OIL Pressure Switch Engine Protective DevicesSpecifications UnpackingLifting the Generator Fuel Consumption Torque SpecificationsBefore Installation Engine OIL RecommendationsOther Published Standards Standby Generator InstallationGenerator Location Nfpa StandardsGrounding the Generator Basic Standby Electric SystemTotal Circuit Isolation Method Emergency Circuit Isolation MethodTransfer Switch Start Signal Connections Battery InstallationVented Batteries Using a Standard GTS Transfer Switch Preparation Before START-UPPrior to Initial START-UP Control Console Components Manual Transfer and Start UP Retransfer and Shutdown Meter Reading Selector SwitchSET Exercise Time Switch Automatic OperationOverload Protection for Engine DC Electrical System Engine HeaterCooling System Checking Fluid LevelsMaintenance OWNER/OPERATOR can Perform Changing the Engine AIR Cleaner Coolant ChangeBattery Miscellaneous MaintenanceCleaning the Generator Battery ReplacementTroubleshooting Points Service Maintenance Interval Information Level Maintenance Level Electrical Data Electrical Data Electrical Data AC Outlet Outlet AC Circuit FED Bumper Ground Wire AssemblyBRACE, Side DOOR, EnclosureGenerac Power Systems, Inc Hinge Slip Female LH Washer NylonHinge Slip Male LH Hinge Slip Male RHGenerac Power Systems, Inc SWITCH, Selector AMP/VOLT CMA BOX AssemblyRocker Switch Dpst SWITCH, Toggle DpdtGenerac Power Systems, Inc DECAL, TRANS. Switch Conn Switch 6A AMP/V SelectorHarness Wiring 1.5L Switch Dpst 5 125V SPD RckrGenerac Power Systems, Inc Support Radiator Tank Coolant RecoveryBracket Coolant Recovery Tank Radiator 1.5LGenerac Power Systems, Inc Hose RES 5/8 RIA 250F Venturi 1.5LGuard FAN NUT HEX M6 -1.0 G8 YEL CHRISOLATOR, Vibration BASE, MountingISOLATOR-VIBRATION Flat WASHER-M8Earth Strap Dampener VibrationWasher Flat M8 Washer Shakeproof EXT 5/16 STLElbow 90 DEG 2 NPT Muffler W/RAIN ShldMufflr Strap 6IN DIA Nipple TOE 2 NPT X 4.5 BLK IronPipe Exhaust Manifold Exhaust 1.5LNipple TOE 1.5 NPT X 6.5 BL Iron Flex Pipe ExhaustBracket Mounting Circuit Breaker Silkscreen P PanelCover BQ Circuit Breaker Circuit Breaker 70 X 2 240V 39782 BrktDECAL, CMA Label Harness CMA WireAssy Home Stdby Logic PP Logic ASM 50/60HZBAR Battery Holddown ASSY,WIRE#16 REDBolt Battery Hold Down Battery Post Cover RED+Cover Connector Housing Housing Governor ConnectorConnector Interface Assembly Assembly Carburator LinkageGenerac Power Systems, Inc Assy Rotor 15KW Housing BlowerAssy Rotor 10KW Assy Rotor 20KWGenerac Power Systems, Inc Flange Fuel Inlet Cover AIR CleanerWeldment Mounting Base Solenoid GAS FuelGenerac Power Systems, Inc Ground Wire Starter Switch OIL PressureARM Adjust Alternator ENGINE-1.5LInstallation Air Outlet Air Intake Installation Air Intake Your Warranty Rights and Obligations MANUFACTURER’S Emission Control System Warranty CoveragePURCHASER’S/OWNER’S Warranty Responsibilities Emission Control System Warranty Emission Related Parts Include the FollowingWarranty Schedule This Warranty Shall not Apply to the Following

004371-2, 004188-1, 004474-1, 004475-1, 004370-2 specifications

Generac Power Systems is renowned for its commitment to providing reliable power solutions, and their various models, including the Generac 004189-1, 004370-2, 004475-1, 004474-1, and 004188-1, showcase the company’s innovative engineering and technology. Each of these models is designed to meet diverse energy needs, ensuring homeowners and businesses can maintain power during outages or in remote locations.

The Generac 004189-1 is an essential model in the lineup known for its robust construction and user-friendly interface. It features a powerful engine, ensuring reliable power output and efficient fuel consumption. Additionally, its lightweight design makes it portable, allowing easy relocation to different sites. The model integrates advanced technology for automatic voltage regulation, safeguarding sensitive electronics while operating.

Moving on to the Generac 004370-2, this model emphasizes advanced start-up technology. It is equipped with a reliable electric start feature, minimizing the effort required to power up the generator. Its noise-dampening design significantly reduces sound levels, making it ideal for residential use without causing disturbances to neighbors. The unit also includes a durable metal enclosure that helps protect the generator from the elements and increases its lifespan.

The Generac 004475-1 model stands out for its enhanced fuel efficiency and low emissions. This eco-friendly design adheres to strict emissions regulations, making it a suitable choice for environmentally conscious users. Its intuitive control panel provides easy monitoring of power output, fuel levels, and maintenance needs, ensuring users can efficiently manage their energy requirements.

Similarly, the Generac 004474-1 exemplifies convenience and performance with its dual fuel capability, allowing it to operate on both gasoline and propane. This flexibility ensures users can easily switch fuels based on availability and cost-effectiveness. The model also boasts an extended runtime, capable of powering essential appliances and systems for prolonged periods during outages.

Finally, the Generac 004188-1 emphasizes ease of use, featuring a comprehensive user manual and a straightforward assembly process. The model provides ample power capacity, making it excellent for both emergency back-up and recreational activities. Its compact design allows storage in confined spaces, while its efficient cooling system prevents overheating during extended use.

Overall, these Generac models reflect the company's dedication to innovation, quality, and user satisfaction. With features aimed at enhancing convenience, performance, and environmental responsibility, they cater to the varying power demands of modern users.
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