Generac Power Systems Using A Standard “Gts” Transfer Switch, Generator Set Lubrication

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Fuel System

Section 3 — Operation

Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators

▼ Electrical 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.

If the unit has been idle for a long period of time, or if the fuel lines or system components have been removed and reinstalled, the fuel system may require bleeding to remove air from the system. Air in the fuel system causes hard starting and rough operation. All fuel system lines must be installed and must be tight. A loose line may show no sign of leakage, but may draw air into the system.

	Use a suitable container to catch the fuel that will
	spill during system bleeding process. Clean up all
	spilled fuel after bleeding.
▼	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.

Check the oil level in the generator gearbox (If so equipped, contact sales for availability.) prior to initial use and at the intervals indicated by the “Service Schedule.” The recommended oil is SAE 90 gear lubri- cant.

Also, if the engine is equipped with a mechanical gover- nor, make sure the governor is properly lubricated with clean engine oil.

▼ Engine Coolant

Have the engine cooling system properly filled with the recommended coolant mixture. Check the system for leaks and other problems. See “Specifications” (Page 7) and “Coolant” (Page 8).

▼ Belt Tension

Make sure the generator is properly connected to an approved earth ground.

Make sure the generator battery is fully charged, proper- ly 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-packaged 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 applicable transfer switch manual for exact oper- ating parameters and timing sequences.

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).

12 Generac® Power Systems, Inc.