Generac 004475-1, 004188-1 Preparation Before START-UP, Using a Standard GTS Transfer Switch

Section 3 - Operation

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

PREPARATION BEFORE START-UP

The instructions in this section assume that the stand- by generator has been properly installed, serviced, test- ed, adjusted and otherwise prepared for use by a com- petent, qualified installation contractor. Be sure to read the “Safety Rules” on Pages 2 and 3, as well as all other safety information in this manual, before attempting to operate this (and related) equipment.

PRIOR TO INITIAL START-UP

Prior to initially starting the generator, it must be properly prepared for use. Any attempt to crank or start the engine before it has been properly serviced with the recommended types and quanti- ties of engine fluids (oil, coolant, fuel, etc.) may result in an engine failure.

Before starting the generator for the first time, the installer must complete the following procedures. For follow-up maintenance information and/or service inter- vals, please refer to Section 4, “Maintenance.”

▼ Transfer Switch

If this generator is used to supply power to any electri- cal system normally powered by an electric utility, the National Electrical Code requires that a transfer switch be installed. The transfer switch prevents electrical backfeed between two different electrical systems. (For additional information, see the applicable transfer switch manual for this unit.) The transfer switch, as well as the generator and other standby components, must be properly located and mounted in strict compli- ance with applicable codes, standards and regulations.

▼ Fuel System

Make sure the fuel supply system to the generator (a) delivers the correct fuel at the correct pressure and (b) is properly purged and leak tested according to code. No fuel leakage is permitted. See “Specifications” (Page 7) for more information.

▼ Generator Set Lubrication

Check the engine crankcase oil level before operating and add oil to the proper level – the dipstick “FULL” mark. Never operate the engine with the oil level below the dipstick “ADD” mark. See “Specifications” (Page 7) and “Engine Oil Recommendations” (Page 8).

NOTE:

This engine is shipped from the manufacturer with 15W-40 oil. This oil should be changed after 30 hours of operation.

▼ Engine Coolant

Have the engine cooling system properly filled with the recommended coolant mixture. Check the system for leaks and other problems. See “Specifications” and “Coolant” (Page 7).

▼ Belt Tension

Check the engine fan belt tension and condition prior to placing the unit into service and at recommended intervals. Belt tension is correct when a force of approx- imately 22 pounds (10 kg), applied midway between pulleys, deflects the belt about 3/8- to 5/8-inch (10 to 16 mm).

▼ Electrical System

Make sure the generator is properly connected to an approved earth ground and/or ground rod.

Make sure the generator battery is fully charged, prop- erly installed and interconnected, and ready for use.

Check to ensure that there are no loose electrical con- nections. Restrain any loose wires to keep them clear of any moving generator set components.

USING A STANDARD “GTS” TRANSFER SWITCH

When required, the pre-packaged standby generator can be installed with a standard Generac “GTS” type automatic transfer switch.

When you use a standard GTS type transfer switch, it controls automatic operation and automatic transfer as follows:

•Solid state circuits in the transfer switch monitor util- ity power source voltage.

•When utility source voltage drops below a pre-set level, transfer switch action closes the circuit. The engine then cranks and starts as controlled by the pre-pack- aged generator’s Control Module circuit board.

•After the engine starts and when the generator AC output voltage and frequency have reached a pre-set value, transfer switch circuits signal the transfer switch main contacts to actuate to the “Standby” power source side. Generator AC output then powers load circuits.

•When the utility power source voltage is restored above a pre-set level, transfer switch solid state cir- cuits signal the switch main contacts to move back to their utility power source side.

•Following re-transfer back to the utility power source side, transfer switch circuit board action opens the circuit. Engine then shuts down.

NOTE:

If your generator is installed in conjunction with a standard GTS type transfer switch, refer to the appli- cable transfer switch manual for exact operating parameters and timing sequences.

Generac® Power Systems, Inc. 11