Generac Power Systems 004988-1 owner manual Generator, Transfer Switch, Automatic System Operation

Page 6

Section 1 - General Information

Guardian Liquid-cooled 27 kW and 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 metal enclosure and is intended for outdoor installation only. Use this generator as a source of electrical power for the oper- ation of 120 and/or 240VAC, single-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

 

 

 

1.5

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.

 

 

Figure 1.2 - Main Circuit Breaker

 

Model

Rating

Phase

Actual Current

C/B Rating*

Circuit Breaker

004948-0

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.

Page 5 Page 7
Image 6
Page 5 Page 7
Contents Liquid-cooled, Prepackaged Standby Generators ‹ 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 Engine Protective DevicesUnpacking Lifting the Generator‹ 1.10.1 Generator Specifications SpecificationsReconfiguring the Fuel System ‹ 1.10.2 Engine SpecificationsEngine OIL Recommendations Torque SpecificationsBefore Installation Coolant RecommendationsGenerator Location Generator Mounting SupportBasic Standby Electric System Emergency Circuit Isolation MethodGrounding the Generator Transfer Switch Signal ConnectionsTotal Circuit Isolation Method Generator AC Neutral ConnectionsPreparation Before START-UP Battery Installation‹ 2.11.2 Transfer Switch ‹ 2.11.1 Prior to Initial START-UPUsing a Standard GTS Transfer Switch Control Console Components‹ 3.2.5 SET Exercise Time Switch Manual Transfer START-UP Engine Governor Adjustments‹ 3.2.2 Fault Indicator LED ‹ 3.2.6 System Ready LEDWeekly Exercise Cycle Retransfer and ShutdownAutomatic Operation 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‹ 4.6.3 Battery Maintenance ‹ 4.6.4 Battery ReplacementScheduled Maintenance Service Maintenance Interval InformationLevel Maintenance Level Troubleshooting Points Problem Cause CorrectionInstallation Diagram Customer Connection PCB J2 ICT LOS WLS HCT Starter Carrier Bolt Battery Post Cover RED + Boot Battery CableBattery Post Cover Baclk Hold Down Battery32 18 Intake Duct HSB Assy GRD Wire 99HSBAssembly BASE-DOOR Ground Wire Duct Discharge RH FrontGenerac Power Systems, Inc Cover Front Panel HSB Assy 2A 12V UL BatteryControl BOX HSB Cover TOP Panel HSB512 Washer Lock M12 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 HSBNER Assy Regulator 3.0L NG or LPV Weldment Mounting BaseFlange Fuel Inlet Washer Flat 5/16 ZincLeads 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 390 40KW 1P Direct HSB 3.9L ChryslerMufflr Strap 6IN DIA HSB MUFFLER, 3.0L FordGasket Exhaust Ring Washer Lock 3/8 SSTube AIR Intake 3.0L Ford ELEMENT, AIR CleanerCover AIR Cleaner Washer Flat M5Guardian Liquid-cooled 27 kW and 30 kW Generators Guardian Liquid-cooled 27 kW and 30 kW Generators This Warranty Shall not Apply to the Following

004988-1 specifications

Generac Power Systems has established itself as a leader in the generator industry, and the Generac Power Systems 004988-1 model exemplifies the company’s commitment to innovation, reliability, and performance. This standby generator is designed to provide seamless power solutions for both residential and commercial applications, ensuring that users remain connected and comfortable even during power outages.

One of the standout features of the 004988-1 model is its automatic transfer switch (ATS), which allows for instant power restoration within seconds of an outage. The ATS continuously monitors the electrical supply and automatically engages the generator when it detects a power failure, eliminating any stress or inconvenience for the user. This feature is particularly beneficial for those who may be away from home during an outage or for businesses that cannot afford downtime.

The 004988-1 is equipped with a powerful engine capable of delivering up to 20 kilowatts of backup power, sufficient to support essential household appliances and systems, such as HVAC, refrigeration, and lighting. Its robust construction ensures durability and longevity, equipped to withstand the rigors of extended use in various environmental conditions.

Another significant characteristic of this model is its emission-friendly design. Generac has incorporated advanced technologies to meet and exceed EPA standards, resulting in a cleaner and more environmentally friendly operation. The generator runs on natural gas or liquid propane, providing users with flexible fuel options and reducing dependency on traditional fuel sources.

Moreover, the 004988-1 comes with smart technology features, including Wi-Fi connectivity. This allows users to monitor and control their generator remotely via a smartphone app. Users can receive real-time notifications, monitor power usage, and conduct maintenance checks, ensuring peak performance of their generator.

The quiet operation of the 004988-1 is also noteworthy, making it an attractive option for residential areas where noise levels can be a concern. Generac has integrated sound-dampening technology, ensuring that the generator operates with minimal noise, allowing users to enjoy peace of mind without disruption.

In summary, the Generac Power Systems 004988-1 is a robust, reliable, and technologically advanced generator that seamlessly integrates into any household or commercial setup. With its automatic transfer switch, high power output, environmentally friendly design, smart technology features, and quiet operation, it stands out as an excellent choice for individuals seeking a dependable power solution for any situation.
Top Page Image Contents