Generac Power Systems 05176-0 owner manual Checking Automatic Operation

Section 3 — Post Installation Start-up and Adjustments

Air-cooled 15 kW Generators

3.5CHECKING AUTOMATIC

OPERATION

To check the system for proper automatic operation, proceed as follows:

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

2.Check that the AUTO/OFF/MANUAL switch is set to OFF.

3.Manually set the transfer switch to the UTILITY position, i.e., load terminals connected to the util- ity power source side.

4.Turn ON the utility power supply to the transfer switch, using the means provided (such as a util- ity main line circuit breaker).

5.Set the AUTO/OFF/MANUAL switch to AUTO. Then set the generator’s main circuit breaker to its ON (or closed) position. The system is now ready for automatic operation.

6.Turn OFF the utility power supply to the transfer switch.

With the AUTO/OFF/MANUAL switch at AUTO, the engine should crank and start when the utility source power is turned OFF. After starting, the transfer switch should connect load circuits to the standby side. Let the system go through its entire automatic sequence of operation.

With the generator running and loads powered by generator AC output, turn ON the utility power supply to the transfer switch. The following should occur:

•After about 15 seconds, the switch should transfer loads back to the utility power source.

•About one minute after retransfer, the engine should shut down.

3.6ADJUSTING THE REGULATOR

(NATURAL GAS ONLY)

Although the generator has been factory set to pro- vide maximum power, it may be necessary in some areas to adjust this setting. Because natural gas has different BTU or power content across the country the engine may not perform as designed.

If experiencing engine problems at high or full load conditions follow these steps. It will require a fre- quency meter to perform this procedure.

1.Turn off utility power to the main distribution panel in the house. This can be done by switching the service main breaker to the off or open posi- tion.

2.Allow the generator to start before loading the generator. Confirm the no-load frequency with the roof open and door off is set at 63-63.5 Hz. Transfer load to emergency circuits.

3. Turn on electrical loads. Be cautious not to over- load the generator. Use the following chart as a guide:

Model	120 Volts	240 Volts
005176	108.3 amps	54.1 amps

4. When full load has been achieved. Connect a fre- quency meter to the output lugs of the generator’s main line circuit breaker.

5. The fuel regulator is fitted with two adjustment screws. While watching the frequency meter, slowly turn the adjustment screw clockwise or counterclockwise one at a time until highest fre- quency is read on the meter. Only limited adjust- ment is available between the set pins. Under no circumstances should any of the pins be removed (Figures 3.1 and 3.2).

Figure 3.1 — Dual Fuel Regulators

V-twin Engine 410cc E

Adjustment	Adjustment
	Screw
Screw
	(One Side
(Both Sides)
	Only)

Set Pin

(Both Sides)

6.When the highest frequency is reached maximum power has been set. Then turn both adjustment screws 1/4 turn counterclockwise. Regulator is now set.

Figure 3.2 — Placement of Regulator

Adjustment Screw

12