11
Testing the Automatic Transfer Switch
Turn the utility service disconnect circuit breaker feeding the
transfer switch contactor to the OFF position. The system’s
automatic sequence described below will initiate. To return to utility
power, turn the utility service disconnect circuit breaker to the
ON position.
Utility Fail
The generator senses when utility voltage is below 70 percent of
nominal. Engine start sequence is initiated after 6 second time
delay.
Engine Warm-Up
Time delay to allow for engine warm-up before transfer. Use jumper
on transfer switch control board to select delay of
20 seconds or 50 seconds.
Transfer
Transfer from utility to generator supply occurs after voltage is
above set levels. The transfer switch control board LED lights will
change from green (utility) to red (generator) and the Symphony II
status light will change blink status from Blink Blink_Pause_Blink
Blink to Blink_Pause_Blink. Minimum engine run time is 5 minutes
after transfer.
Load Management
Five minutes after transfer to generator power, the remote modules
energize connected load(s) if generator power is available, starting
with the highest priority (1) through the lowest priority (8). There is
a 10 second delay between each sequential activation.
The P1 through P8 LED’s (
A
) on the Symphony II control board will
illuminate to show loads being added.
Loads connected to remote modules set to priorities 9 and 10
remain off for the duration of a utility power outage.
Utility Pickup
Voltage pickup level is 80 percent of nominal voltage.
Retransfer
Retransfer from generator to utility power is approximately 10
seconds after utility voltage supply is above pickup level and
minimum run time is completed. All remote module(s) will remain
OFF for five minutes after the power transfer.
Engine Cool Down
Engine will run for 60 seconds after retransfer.
Controls
Other than a Manual Override lever, there are no operator controls
because this is an automatic transfer switch. The manual override
is to be used only by licensed professionals. Information on handle
use can be obtained by calling Technical Service at 800-743-4115.
Operation
To select automatic transfer operation, do the following:
1. In transfer switch, set utility disconnect circuit breaker
to “ON” position.
2. In transfer switch, set generator disconnect circuit
breaker to “ON” position.
3. Install 15 Amp fuse in generator’s control panel.
4. Set generator’s circuit breaker to “ON” position.
5. Set generator’s system switch to “AUTO” position.
The system will now be in automatic operation mode.
When the generator is providing power to the transfer
switch, the transfer switch control board is constantly
monitoring generator power. If the air conditioner is called
to run, and there is sufficient generator power available,
the controller will close contacts “A-A” to air conditioner
contactor. Contacts “B B” will open before contacts A-A
close. If loads are too great for the generator, contacts A-A
and/or B-B will open. When air conditioning is not needed,
A-A will open. If enough power is available, B-B will close.
Enclosure Door
To open door, press the spring-load door lock to the right
and pull down on the door.
To close and latch door, push door closed against enclosure.
While in this position, push door upwards. This will cause
spring-load door lock to engage and latch door in place.
Enclosure door MUST be closed and latched at all times
except when system is being serviced.
WARNING
Shock Hazard. Equipment contains high voltage
that could cause electrocution resulting in death or
serious injury.
•
Testing must only be performed by qualified personnel.
•
Do not operate this equipment imprudently, carelessly or neglect
its maintenance.
NOT
for
REPRODUCTION
