Generac Power Systems 05176-0 - Manual (Page 14)

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3.5 CHECKING 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.
3.6 ADJUSTING 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:
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
410cc E
Adjustment
Screw
(One Side
Only)
V-twin Engine
Adjustment
Screw
(Both Sides)
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
Section 3 — Post Installation Start-up and Adjustments
Air-cooled 15 kW Generators
Model 120 Volts 240 Volts
005176 108.3 amps 54.1 amps