Generac Power Systems 04758-1, 04759-1, 04760-1 Before Initial START-UP, Electrical Checks

Section 2 — Post Installation Start-up and Adjustments

Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators

The following procedures are to be observed:

•Wear full eye protection and protective clothing;

•Where electrolyte contacts the skin, wash it off immediately with water;

•Where electrolyte contacts the eyes, immediately flush thoroughly with water and seek medical attention; and

•Spilled electrolyte is to be washed down with an acid neutralizing agent. A common practice is to use a solution of 1 pound (500 grams) bicarbonate of soda to 1 gallon (4 liters) or water. The bicar- bonate of soda solution is to be added until the evidence of reaction (foaming) has ceased. The resulting liquid is to be flushed with water and the area dried.

Lead-acid batteries present a risk of fire because they generate hydrogen gas. The following procedures are to be followed:

•DO NOT SMOKE when near the battery;

•DO NOT cause flame or spark in battery area; and

•Discharge static electricity from body before touch- ing the battery by first touching a grounded metal surface.

Be sure the AUTO/OFF/MANUAL switch is set to ! the OFF position before connecting the battery cables. If the switch is set to AUTO or MANUAL,

the generator can crank and start as soon as the battery cables are connected.

Be sure the utility power supply is turned off, or sparking may occur at the battery posts as the cables are attached and cause an explosion.

2.1BEFORE INITIAL START-UP

Before starting, complete the following:

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

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

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

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.

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.

DANGER

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.Turn on the utility power supply to the transfer switch using the means provided (such as a utili- ty main line circuit breaker).

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.

2.Use an accurate AC voltmeter to check utility power source voltage across terminals N1 and N2. Nominal line-to-line voltage should be 240 volts AC.

3.Check utility power source voltage across termi- nals N1 and the transfer switch neutral lug; then across terminal N2 and neutral. Nominal line-to- neutral voltage should be 120 volts AC.

4.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.

5.Set the generator's main circuit breaker to its OFF (or open) position. Initial tests will be con- ducted at no-load condition.

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

7.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.

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.

10 Generac® Power Systems, Inc.