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Operation
To select automatic transfer operation, do the following:
1A. For models 071018 & 071019, set disconnect switch
that sends utility power to transfer switch to “On”
position. This switch is probably located in the main
breaker panel.
1B. For models 071020 & 071021, set utility breaker in
transfer switch “On” position.
2. Set generator main circuit breaker to its “On” position.
3. Install 15 Amp fuse in generator control panel.
4A. If generator is equipped with a system ON/OFF switch,
set switch to “On” position.
4B. 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 control module is constantly monitoring
generator power. If the air conditioner is called to run, and
there is sufficient generator power available, the control
module 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 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 the Automatic Transfer Switch

Turn the disconnect switch 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
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 (see System Setup).
Transfer
Transfer from utility to generator supply occurs after 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 generator to utility supply is approximately
10 seconds after utility voltage supply is above utility 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.