Section 2 — Post Installation
Guardian
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. 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.
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 screws clockwise or counterclockwise one at a time until the highest frequency is read on the meter. Only limited adjustment is available between the set pins (7 kW only). Under no cir- cumstances should any of the pins be removed (Figures 2.1 and 2.2).
Figure 2.1 — Dual Fuel Regulators
990 | 410 |
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 six 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 posi- tion.
2. Allow the generator to start. Before loading the generator, confirm that the No Load Frequency, with the roof open and door off, is set to
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 |
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| 7 kW | 50.0 amps | 25.0 amps |
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| 12 kW | 100.0 amps | 50.0 amps |
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| 13 kW | 108.3 amps | 54.1 amps |
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4. When full load has been achieved. Connect a fre- quency meter to the output lugs of the generator’s main line circuit breaker.
12 Generac® Power Systems, Inc.
Adjustment | Adjustment | Set | |
Screw | |||
Pins | |||
Screw | |||
(One Side | |||
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(Both sides) |
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Only) |
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6.When the highest frequency is reached maximum power has been set. From this point turn both adjustment screws 1/4 turn counterclockwise. The 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.