Winco ASCO 165 4-Wire - Manual (Page 5)

5
FUNCTIONAL TEST (after installation)
After installing the Series 165 automatic transfer switch
perform the following three–part functional test.
1 – MANUAL OPERATION
ELECTROCUTION – FLASH HAZARD
Do not manually operate the transfer
switch until utility and generator are
disconnected; open circuit breakers.
1. Put both the preferred source circuit breaker and the
alternate source circuit breaker feeding the automatic
transfer switch in the
OFF position. Verify that ALL
POWER IS OFF ! (See page 2 for handle location.)
2. Grasp the maintenance handle and turn it quickly with
your thumb and fingers to manually operate the transfer
switch. The switch should operate smoothly without
binding. If it does not, check for shipping damage or
construction debris.
maintenance handle
With ALL POWER OFF
grasp maintenance
handle and turn it
quickly with your
thumb and fingers.
weight marked P (preferred) and A (alternate)
3. After checking the manual operation operate the handle
again quickly to return the transfer switch to the preferred
position (letter P on the round weight facing you).
2 – VOLTAGE CHECKS
The Series 165 automatic transfer switch is rated for
nominal 240 V ac at 60 Hz (as stated on the nameplate).
Verify that both your preferred and alternate sources are
also 240 V ac nominal, 60 Hz. See the wiring diagram.
3 – ELECTRICAL OPERATION
This procedure checks the electrical operation of the
automatic transfer switch. If the actual operation does not
follow this procedure, consult the Troubleshooting section.
PERSONAL INJURY HAZARD
Install front cover before operation.
An electrical system fault could
cause a flash and cause injury.
!
1. Install the enclosure cover and tighten the screws.
2. Verify that the generator battery is connected and that the
generator’s starting controls are set for automatic.
source acceptable lights
transfer switch on generator
(alternate source) light
test button
transfer switch on utility
(preferred source) light
3. Turn on the preferred source (utility) circuit breaker.
4. Turn on the alternate source (generator) circuit breaker.
5. Verify that
UTILITY (preferred source) acceptable light is on.
6. Verify that the TRANSFER SWITCH on utility (preferred
source) light is on.
7. This step will start the generator. Press and hold the
Push to Test button until the GENERATOR (alternate
source) acceptable light comes on and stays on. Then
release the button.
This light indicates that the generator is running and
that its output voltage and frequency are acceptable.
Under typical conditions, the light should come on after
about 5 to 10 seconds. If the generator is running and
fails to produce the proper voltage and frequency after
60 seconds then a malfunction has occurred (consult
the Troubleshooting section).
8. About 15 seconds after the GENERATOR (alternate
source) acceptable light comes on, the automatic
transfer switch transfers the load from the utility to the
generator. The
TRANSFER SWITCH on generator
(alternate source) light comes on.
9. The transfer switch stays connected to the generator for
5 minutes. Then the load is transferred back to the utility.
To bypass time delay, press and release the
Push to Test
button again.
10. After load retransfer to utility, the generator runs 1 minute
(without load), then shuts down. The GENERATOR
acceptable light goes off indicating that generator is off.
This completes the Functional Test. Proceed to next page.