Winco ULPSS20B4W/A - Manual (Page 15)

5 20-00 60706-228
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***** WARNING *****
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PERSONAL INJURY HAZARD - Install front cover
in transfer switch before operation. An electrical sys-
tem fault could cause a flash and severe personal
injury.
2. Turn on the preferred source (utility) circuit
breaker. The UTILITY acceptable light should now
come on as well as the TRANSFER SWITCH on
utility light. If these lights fail to come on, recheck
your incoming power to insure you have 240 volts
nominal. If not, troubleshoot your utility source be-
fore continuing.
3. Turn on the alternate source (generator) circuit
breaker.
There are two ways to test your transfer switch
operation: WITHOUT a load transfer or WITH a
load transfer.
WITHOUT load transfer (normal exercise)
. Press and release the Push to Test button.
The generator set should start immediately. In about
5 seconds the GENERATOR acceptable light
comes on and stays on.
2. The generator set runs for 20 minutes. The
Transfer Switch does not transfer the load to the
generator set. The TRANSFER SWITCH on utility
light stays on.
3. To bypass the time delay or cancel the test,
press and release the Push to Test button again.
4. The generator set stops and the GENERATOR
acceptacle light goes off.
WITH Load Transfer
. Press and hold the Push to Test button until
the GENERATOR acceptable light comes on and
stays on. Then release the button. This will start up
your generator set.
This light indicates that the generator is running and
the output voltage and frequency are within accept-
able limits. Under normal conditions this light should
come on in 5 to 0 seconds. If the light does not
come on and stay on, a malfunction has occurred.
Either the unit didn’t start or the voltage or frequency
is incorrect. Correct the problem before continuing.
2. About 5 seconds after the GENERATOR
acceptable light comes on, the automatic transfer
switch should transfer the load from the utility to the
generator. At that time the TRANSFER SWITCH on
generator light should come on.
3. The generator will stay connected to the load
for about 5 minutes at which time the transfer switch
will transfer the load back to the utility. At the time
it transfers back to utility the TRANSFER SWITCH
on UTILITY light should come on and the TRANS-
FER SWITCH on generator light should go out. To
bypass this five minute time delay you can press and
release the Push to Test button again at any time.
4. After the load retransfers to the utility, the gen-
erator will continue to run for about minute (without
a load) and then shut down. The GENERATOR
acceptable light will go off indicating the generator
set has shut down.
This completes the functional test of the transfer
switch and the generator set. If you want to leave
the generator in the automatic start mode, you can
leave the left hand toggle switch on the generator in
the ON position. If you have additional work to do
or don’t want to leave the engine generator set in
the automatic position start mode, move the toggle
switch to the OFF position. In the OFF postion the
alarm light will come on and the generator set will
not start or run.
GENERATOR EXERCISER CIRCUIT
The automatic generator exerciser is configured to
automatically exercise the generator for 20 minutes
once every 4 days.