User manual

NOTE: This connection grounds the neutral side of the
generator output, and is required for correct operation of
protection devices in the installation.
8. Plug in current transformer leads into “CT1” and “CT2”
on control module.
9. Connect generator Ground conductor from the control
panel to the transfer switch “GND” terminal.
NOTE: Assure generator equipment grounding conductor
is connected per applicable federal, state and local codes,
standards and regulations.
10. Connect generator “UTILITY 230 VAC” terminals to
transfer switch “UTILITY 230 VAC” terminals (F1, F2).
Use minimum 2.5mm
2
conductors.
NOTE: Replace with fuse of same type and rating, 600 volt,
2 amp.
11. Tighten all wire connections/fasteners to proper torque
as shown below.
Low Voltage Wiring
1. Using 1.0mm
2
twisted pair conductors, no greater than
60 m in length, connect Tx Rx and Tx Rx Ground from
the generator control panel to the GND and T/R on the
transfer switch control board.
2. Tighten all wire connections/fasteners to proper torque.
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.
Operation
To select automatic transfer operation, do the following:
1. Set service disconnect switch that sends utility power
to transfer switch contactor to “On” position.
2. Set generator’s main circuit breaker to its “On”
position.
3. Install 15 Amp fuse in control panel on generator.
4. Set generator system AUTO/OFF 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 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.
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.
10 BRIGGSandSTRATTON.COM
Generator
Transfer
Switch