Gasboy CFN Series Site Controller III - Manual (Page 55)

MDE-4298D CFN Series Site Controller III Installation Manual · September 2009 Page 51
Control Lines Pump/Remote Dispenser Wiring
Control Lines
Descriptions of control lines are provided to familiarize the installer with control inputs and
outputs that are used to control a mechanical pump/remote dispenser. It is recommended that
the installer read these descriptions to obtain a better working knowledge of the system, to
plan the site wiring.
Grounding
To ensure proper operation of the equipment and provide the necessary safety factors, the unit
must be grounded. A ground wire (preferably green) must be connected between the unit’s AC
junction box ground lug and the main electrical service panel. One earth ground connection is
required per unit. A ground rod must be installed at the main electrical panel in accordance
with the National Electrical Code. This ground rod must be a solid, corrosion-resistant
conductor. It should be properly tied into the ground bus strip of the panel. It is recommended
that the neutral and ground bus strips be bonded together (unless prohibited by local codes).
Reset Motor Feed
Reset Motor Feed is a 120 VAC input that is supplied through the pump handle switch to
activate the reset motor. This line should be switched through the CFN System and only be on
when the pump/remote dispenser is authorized or in the manual mode. Without power
supplied to this line, the pump/remote dispenser will not reset when the pump handle is turned
on. Two feed lines are provided for twins. This feed is also connected to the input of one of the
internal switches of the electric reset. When the reset finishes its cycle, the 120 VAC input to
the switch should be passed through as an output, which causes the solenoid valve (optional in
some models) to open and the Reset Complete line to indicate 120 VAC.
Note: This line is also used to sense the closing of the pump handle for console operation. A
low current 120 VAC is supplied through this line in order to sense the condition of the
handle. This low current voltage is not capable of driving the reset motor or operating a
solenoid valve.
Pump Motor Feed
Pump Motor Feed is a 120 VAC input that is supplied to the input side of one of the internal
switches of the electric reset. This line should be switched through the CFN System and
should only be turned on when the pump/remote dispenser is authorized or in the manual
mode. When the reset finishes its cycle, the 120 VAC input to the switch is passed through as
an output causing the pump motor to receive power and begin running. Without power to this
line, the unit will reset. However, it will not be able to fuel. Two feed lines are provided in
twins which contain two motors. The gauge of this wire (and its neutral wire) should be
determined according to the size of the motor, the voltage at which the motor will be powered
(120 VAC or 240 VAC), and the distance from the breaker panel to the pump. It is possible to
combine the pump motor feeds for twins and supply them from one breaker. However, the
gauge of the wire must be adjusted to handle the load of two motors.
Note: 240 VAC is developed across a motor when the other leg of the motor is connected to a
Phase 2 Feed.