Checking Automatic Operation - Generac Power Systems 7 kW NG Repair Manual

Section 5.1
System Functional Tests

CHECKING AUTOMATIC OPERATION

To check the system for proper automatic operation, proceed
as follows:
1. Set generator main circuit breaker to its OFF (or open)
position.
2. Check that the AUTO-OFF-MANUAL switch is set to OFF.
3. Turn off the utility power supply to the transfer switch,
using whatever means provided (such as a utility main
line circuit breaker).
4. Manually set the transfer switch to the UTILITY position, i.e.,
load terminals connected to the utility power source side.
5. Turn on the utility power supply to the transfer switch,
using the means provided (such as a utility 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.
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 fifteen seconds, the switch should transfer
loads back to the utility power source.
• About one minute after retransfer, the engine should shut
down.
Page 146
PART 5
OPERATIONAL TESTS