10

OPERATION

SYSTEM OPERATION
To select automatic transfer operation,do the following:
1A. For models 071008 & 071009, set service disconnect
switch that sends utility power to transfer switch
contactor to “On” position.
B. For models 071010 & 071011, set service disconnect
switch that sends utility power to transfer switch utility
disconnect circuit breaker to “On” position.
2. For models 071010 & 071011,set transfer switch
utility disconnect circuit breaker to “On” position.
3. Set generator’s main circuit breaker to its “On”
position.
4. Install 15 Amp fuse in control panel on generator.
5A. If generator is equipped with a system ON/OFF
switch,set switch to “On” position.
B. If generator is equipped with a AUTO/OFF/MANUAL
switch,set switch to “AUTO” position.
The system will now be in automatic operation mode.
When the generator is providing power to the transfer
switch,the controller 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.Should loads be
too great for 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.
TESTING THEAUTOMATIC TRANSFERSWITCH
Turn the service disconnect feeding the transfer switch
contactor to the “Off” position.The Automatic Sequence
of the system will follow.To go back to utility power,turn
the service disconnect to the “On” position.

Automatic Sequence

Utility Fail
The Home Standby Generator set 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
fixed at 20 seconds or 50 seconds with removal of jumper
on control board.
Transfer
Transfer from utility to standby supply occurs after standby
voltage is above set levels.Minimum engine run time is
5 minutes after transfer.
Utility Pickup
Voltage pickup level is 80 percent of nominal voltage.
Retransfer
Retransfer from standby to utility supply is approximately
10 seconds after utility voltage supply is above pickup level
and minimum run time is completed.
Engine Cool Down
Engine will run for 60 seconds after retransfer.

When Calling the Factory

Before contacting Briggs and Stratton Power Products
regarding service or repair of this transfer switch,obtain
the Model Number and Serial Number from the unit data
decal located on or inside the enclosure.
To contact Briggs and Stratton Power Products call
1-800-743-4115,between 8:00 AM and 5:00 PM CT.