Generac Power Systems 004877, Owner'S Manual, Page: 27 / 44

Operation
Integrated Load Center Owner’s Manual 23
Generator Tests Under Load
1. Set the generator main circuit breaker to OFF
(OPEN).
2. Set the utility service disconnect circuit breaker to
OFF (OPEN).
3. Manually actuate the transfer switch main contacts
to the standby position.
4. Select the manual mode of operation to start the
generator. When engine starts, let it stabilize for a
few minutes.
5. Set the generator main circuit breaker to ON
(CLOSED). The generator now powers all load
circuits. Verify generator operation under load as
follows:
• Turn on electrical loads to the full rated wattage/
amperage capacity of the generator. DO NOT
OVERLOAD.
• With maximum rated load applied, check voltage
and frequency across transfer switch terminals E1
and E2. Voltage should be greater than 230 VAC
(240 VAC system); frequency should be greater
than 59 Hz.
• Verify that the gas pressure remains within
acceptable parameters (see the generator
installation manual).
•
Let the generator run under rated load for at least
30 minutes. Listen for unusual noises, vibration,
overheating, etc., that might indicate a problem.
6. Set main circuit breaker of the generator to the
OFF (OPEN) when checkout under load is
complete.
7. Let the generator run at no-load for several
minutes. Then shut down by selecting OFF mode.
8. Set the main switch contacts back to the utility
position.
9. Place the manual handle in its storage bracket.
NOTE: Handle and operating lever of transfer switch
should be in up position.
10. Turn on the utility power supply to transfer switch,
using whatever means provided (such as a utility
main line circuit breaker). The utility power source
now powers the loads.
11. The system is now set for fully automatic operation.
Checking Automatic Operation
Proceed as follows to check the system for proper
automatic operation:
1. Verify generator is off.
2. Verify switch is de-energized.
3. Install front cover of the transfer switch.
4. Turn the utility power supply to the transfer switch
ON, using the utility main line circuit breaker.
5. Set the generator main circuit breaker to ON.
6. Select AUTO on the generator panel. The system
is ready for automatic operation.
7. Turn utility power supply to the transfer switch off.
With the generator ready for automatic operation, the
engine will crank and start when the utility source power
is turned off after a 10 second delay (factory default
setting). After starting, the transfer switch will connect
load circuits to the standby side after the engine warm-up
delay. Let the system operate 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 will occur:
• The switch will transfer loads back to the utility
power source after approximately 15 seconds.
• The engine will shut down approximately five
minutes after transfer.
With the generator in the AUTOMATIC mode, the system
is now set for fully automatic operation.
Installation Summary
1. Verify the installation has been properly performed
as outlined by the manufacturer and that it meets
all applicable laws and codes.
2. Verify proper operation of the system as outlined in
the appropriate installation and owner’s manuals.
3. Educate the end-user on the proper operation,
maintenance and service call procedures.