Gasboy CFN Series Site Controller III - Manual (Page 48)

Pump/Remote Dispenser Wiring Power Requirements
Page 44 MDE-4298D CFN Series Site Controller III Installation Manual · September 2009
Power Requirements
Electronic Pumps
All electronic register pumps/remote dispensers must be installed according to the
manufacturer’s instructions.
Suction Pumps
The CFN PCU is capable of directly driving pump motors up to 3/4 HP at 120/240 VAC, or
1-1/2 HP at 240 VAC. A starter relay must be used with pump motors exceeding these
limitations. A separate circuit breaker should be supplied for each pump to meet the current
requirements and to allow for isolated control with the circuit breaker panel in case of
problems.
Remote Dispensers
The CFN PCU is capable of directly driving submersible pumps up to 3/4 HP at
120/240 VAC, or 1-1/2 HP at 240 VAC. A remote dispenser with a submersible pump
exceeding these limitations requires the use of a submersible starter relay. A separate circuit
breaker should be supplied for each remote dispenser in cases where it will directly drive the
submersible pump. Remote dispensers may be grouped together on a single breaker when the
submersible pump has its own breaker. It is recommended that no more than two remote
dispensers be powered from one breaker to maintain isolated control with the circuit breaker
panel in case of problems.
Gasboy 9800 Pumps/Remote Dispensers
Gasboy 9800 Series pumps and remote dispensers do not use the CFN PCU. They are wired as
standalone units. Refer to MDE-4331 Atlas Installation Manual, for wiring diagrams and
instructions.
Wire Size
The table below lists the required AC wire size for suction and submersible pumps based on
the HP rating of the pump motor and the distance from the circuit breaker to the pump/remote
dispenser for both 120 and 240 V units. Use this table as a guide for selecting the proper size
wire for your installation. All wiring should be stranded.
The wire size for the switch detect from the pump should be 14 AWG. The wire size for
control lines of a remote dispenser should be 12 AWG. These control lines are used to supply
power for the reset mechanism, solenoid valve, and submersible starter relay (when the
submersible pump is not directly powered by the remote dispenser). The wire size for DC
pulsers should be 18 AWG and must meet the wiring requirements outlined in
“Pulser Wiring and Configuration” on page 53 .