Briggs & Stratton NEMA 3R manual Controls, Operation, System Setup

System Setup

You must perform the following before operating the system:

•If generator is installed in an area regularly subjected to temperatures below 40°F (4°C), select a 50 second warm up time by moving jumper installed on JP2 from ‘20’ position to ‘50’ position.

•Place the 2 position sliding switch on the control module in the NG or LP position, whichever is appropriate for your system.

•Place the 3 position sliding switch on the control module to match the KW rating of the Home Standby Generator set.

3 Position		2 Position
Switch	JP2	Switch

CT1 & CT2

Connectors

Supervisory

Contacts

Controls

The Manual Override lever is to be used only by licensed professionals. The essential branch circuit breakers are used in the same way as those supplied in the main distribution panel.

Operation

To select automatic transfer operation, do the following:

1.Set essential circuit breaker that sends utility power to transfer switch to “On” position.

2.Set generator’s main circuit breaker to its “On” position.

3.Install 15 Amp fuse in control panel on generator.

4A. 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. 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 essential circuit breaker feeding the transfer switch to the “Off” position. The automatic sequence will follow. To go back to utility power, turn the essential circuit breaker to the “On” position.

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 is fixed at 20 seconds or 50 seconds (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 pickup level and minimum run time is completed.

Engine Cool Down

Engine will run for 60 seconds after retransfer.

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