Section 2 — Post Installation Start-up and Adjustments

Air-cooled 8.5 kW Generator

2.1BEFORE INITIAL START-UP

Before starting, complete the following:

1.Set the generator's AUTO/OFF/MANUAL switch to the OFF position.

2.Turn OFF the utility power supply to the transfer switch using the means provided (such as the utility main line circuit breaker).

3.Turn OFF all loads connected to the tranfer switch terminals T1 and T2.

4.Check the engine crankcase oil level and, if nec- essary, fill to the dipstick FULL mark with the recommended oil. Do not fill above the FULL mark.

5.Check the fuel supply. Gaseous fuel lines must have been properly purged and leak tested in accordance with applicable fuel-gas codes. All fuel shutoff valves in the fuel supply lines must be open.

4.Use an accurate AC voltmeter to check UTILITY power source voltage across transfer switch ter- minals N1 and N2. Nominal line-to-line voltage should be 240 volts AC.

5.Check UTILITY power source voltage across ter- minals N1 and the transfer switch neutral lug; then across terminal N2 and neutral. Nominal line-to-neutral voltage should be 120 volts AC.

6.When certain that UTILITY supply voltage is com- patible with transfer switch and load circuit rat- ings, turn OFF the UTILITY power supply to the transfer switch.

7.On the generator panel, set the AUTO/OFF/MAN- UAL switch to MANUAL. The engine should crank and start.

8.Let the engine warm up for about five minutes to allow internal temperatures to stabilize. Then, set the generator’s main circuit breaker to its ON (or closed) position.

Never operate the engine with the oil level

!below the “Add” mark on the dipstick. Doing this could damage the engine.

2.2CHECK TRANSFER SWITCH

OPERATION

Refer to Section 3.5, of the owner’s manual for man- ual operation procedures.

Do not attempt manual transfer switch opera- tion until all power voltage supplies to the transfer switch have been positively turned off. Failure to turn off all power voltage supplies will result in extremely hazardous and possibly fatal electrical shock.

2.3ELECTRICAL CHECKS

Complete electrical checks as follows:

1.Set the generator's main circuit breaker to its OFF (or open) position.

2.Turn OFF all loads connected to the transfer switch terminals T1 and T2.

3.Turn on the UTILITY power supply to the trans- fer switch using the means provided (such as a utility main line circuit breaker).

DANGER

Proceed with caution! Generator power voltage is now supplied to the transfer switch. Contact with live transfer switch parts will result in dangerous and possibly fatal electrical shock.

9.Connect an accurate AC voltmeter and a frequen- cy meter across transfer switch terminal lugs E1 and E2. Voltage should be 242-252 volts; fre- quency should read about 61-63 Hertz.

10.Connect the AC voltmeter test leads across termi- nal lug E1 and neutral; then across E2 and neu- tral. In both cases, voltage reading should be 121- 126 volts AC.

11.Set the generator’s main circuit breaker to its OFF (or open) position. Let the engine run at no- load for a few minutes to stabilize internal engine generator temperatures.

12.Set the generator's AUTO/OFF/MANUAL switch to OFF. The engine should shut down.

NOTE:

It is important not to proceed until certain that generator AC voltage and frequency are correct and within the stated limits. Generally, if both AC frequency and voltage are high or low, the engine governor requires adjustment. If frequency is cor- rect, but voltage is high or low, the generator’s voltage regulator requires adjustment.

DANGER

The transfer switch is now electrically “hot.” Contact with “hot” parts will result in extreme- ly hazardous and possibly fatal electrical shock. Proceed with caution.

10 Generac® Power Systems, Inc.

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Generac 004692-2 owner manual Before Initial START-UP, Check Transfer Switch Operation, Electrical Checks

004692-2 specifications

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