Guardian Technologies 04758-2, 04759-2, 04760-2 guide

Section 2 — Post Installation Start-up and Adjustments

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

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

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

6.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.

7.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 sup- ply to the transfer switch. The following should occur:

•After about 13 seconds, the switch should transfer loads back to the utility power source.

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

2.6ADJUSTING 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 position.

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 appliances, lights, pumps, etc., that are on the emergency circuits in an attempt to fully load the generator. Be cautious not to overload the generator. Use the following chart as a guide:

Unit	120 Volts	240 Volts
7 kW	50.0 amps	25.0 amps
12 kW	100.0 amps	50.0 amps
15 kW	108.3 amps	54.2 amps

12 Generac® Power Systems, Inc.

4.When 3/4 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 one (7 kW), or two (12 & 15 kW) adjustment screws. While watching the frequency meter, slowly turn the adjustment screw clockwise or counterclockwise one at a time until highest frequency is read on the meter. Only limited adjustment is available between the set pins. Under no circumstances should any of the pins be removed (Figures 2.1 and 2.2).

Figure 2.1 — Dual Fuel Regulators

V-twin

410

Adjustment	Adjustment	Set
Adjustment	Screw	Set
Screw	(One Side	Pin
(Both Sides)	Only)
	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 2.2 — Placement of Regulator

Adjustment Screw

7.Turn utility power to the main distribution panel back on. This can be done by switching the serv- ice main breaker to the on or closed position. Allow the generator to shut down.

Do not make any unnecessary adjustments.

!Factory settings are correct for most applica- tions. However, when making adjustments, be careful to avoid overspeeding the engine.

04758-2, 04759-2, 04760-2 specifications

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