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Testing the Automatic Transfer Switch
Turn the service disconnect circuit breaker feeding the transfer
switch contactors to the OFF position. The system's automatic
sequence described below will initiate. To return to utility power,
turn the utility service disconnect circuit breakers 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
There is a 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 and after the initial warm-up period. 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 power 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.
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 contact Technical Service at www.
BRIGGSandSTRATTON.COM.
Operation
To select automatic transfer operation, do the following:
1. In the transfer switch, set both utility disconnect circuit
breakers to ON position.
2. In the 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.
13
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.
When Calling for Assistance
You must have the Model Number and Serial Number from each
transfer switch or remote module ID label at hand if it is necessary
to contact a local service center regarding service or repair. Obtain
this information from the unit ID labels located on or inside device.
For convenience, record the information on the inside front cover of
this manual.
To contact Briggs & Stratton visit www.BRIGGSandSTRATTON.
COM.
Installation Inspection
Before placing the system into service, inspect the entire installation
carefully.
This completes the installation and startup instructions. The
operator's manual provides full details on Operation, Maintenance,
and Troubleshooting for the Automatic Transfer Switch.
BRIGGSandSTRATTON.COM
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