Operation
Automatic Transfer Switch Owner’s Manual
17
Generator Tests Under Load
1.
Set the generator main circuit breaker to OFF
(OPEN).
2.
Set the utility service disconnect circuit breaker of
the transfer switch to OFF (OPEN), and turn OFF
(OPEN) all load circuit breakers.
3.
Manually actuate the transfer switch main contacts
to the emergency (standby) position. See
.
4.
Select MANUAL mode to start generator. Allow
engine to stabilize for a few minutes, and close lid
(if applicable).
5.
Set the generator main circuit breaker to ON
(CLOSED). The generator now powers all LOAD
circuits. Check 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 gas pressure remains within acceptable
parameters (see the generator installation man-
ual).
• Allow the generator to run under rated load for at
least 30 minutes. Observe for unusual noises,
vibration, or overheating that might indicate a
problem.
6.
Set generator main circuit breaker to OFF (OPEN)
when checkout under load is complete.
7.
Allow generator to run at no-load for several min-
utes. Then shut down by selecting OFF.
8.
Move main switch contacts to utility position.
NOTE:
See
. Handle and operating
lever of transfer switch should be DOWN.
9.
Set transfer switch utility service disconnect circuit
breaker to ON (CLOSED).
The system is now set for fully automatic operation.
Checking Automatic Operation
Proceed as follows to check system for proper automatic
operation:
1.
Verify generator is OFF.
2.
Set transfer switch utility service disconnect circuit
breaker to OFF (OPEN).
3.
Verify switch is de-energized.
4.
Install front cover of the transfer switch.
5.
Set transfer switch utility service disconnect circuit
breaker to ON (CLOSED).
6.
Set generator main circuit breaker to ON.
7.
Select AUTO on generator panel. The system is
now ready for automatic operation.
8.
Set transfer switch utility service disconnect circuit
breaker to OFF (OPEN).
With the generator ready for automatic operation, the
engine will crank and start when the utility source power
is turned OFF after a five second delay (factory default
setting). After starting, the transfer switch will connect
load circuits to the standby side after a five second warm-
up delay. Allow system to operate through its entire
automatic sequence of operation.
NOTE:
Timer durations may differ between generators
and settings.
With the generator running and loads powered by
generator AC output, set the transfer switch utility service
disconnect circuit breaker to ON (CLOSED). The
following will occur:
•
The switch will transfer loads back to the utility power
source after approximately 15 seconds.
•
The generator will shut down approximately one
minute 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 proper operation, mainte-
nance, and service call procedures.
NOTE:
The utility power circuit breaker in the transfer
switch must be turned OFF to simulate a utility outage.
Shutting off the main disconnect in a subpanel connected
to the transfer switch will NOT simulate an outage.
Shutting Generator Down While
Under Load
IMPORTANT NOTE: To avoid equipment damage,
follow these steps, in order, when shutting the gener-
ator down during utility outages. Shutdowns may be
required during outages to perform routine mainte-
nance or to conserve fuel.
To turn the generator OFF (while running in AUTO
and online):
1.
Turn the main utility disconnect off.
