Section 2 — Post Installation Start-up and Adjustments
15.Set the Auto/Off/Manual switch to OFF. The engine should shut down.
2.5CHECKING AUTOMATIC
OPERATION
To check the system for proper automatic operation, proceed as follows:
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 at
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:
1.Check that the Auto/Off/Manual switch is set to OFF.
2.Turn OFF the utility power supply to the transfer switch, using the means provided (such as a util- ity main line circuit breaker).
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. The sys- tem is now ready for automatic operation.
6.Turn OFF the utility power supply to the transfer switch.
| Unit | 120 Volts | 240 Volts |
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| 8.5 kW | 70.8 amps | 35.4 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.
5.The fuel regulator is fitted with two 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. (Figures 2.1 and 2.2).
Figure 2.1 — Dual Fuel Regulators
990
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:
Adjustment |
Screw |
(Both sides)
•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.
6.When the highest frequency is reached maximum power has been set. From this point, turn both adjustment screws 1/4 turn clockwise. The regu- lator is now set.
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 you experience 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.
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.
Generac® Power Systems, Inc. 11