Gasboy CFN Series SCII Installation Manual - Manual (Page 59)

CFN Series System
4-10 05/28/03
CONTROL LINES
Descriptions of the control lines are provided to familiarize the installer with the 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 in order to
guide him in planning 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 (1) 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 is to be a solid, corrosion-resistant conductor. It
should be properly tied into the ground bus strip of the panel. We recommend the neutral and
ground bus strips be bonded together (unless prohibited by local codes).
Reset Motor Feed
This is a 120VAC input which 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 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 120VAC input to the switch will be passed
through as an output causing the solenoid valve (optional in some models) to open and the Reset
Complete line to indicate 120VAC.
NOTE: This line is also used to sense the closing of the pump handle for console operation. A
low current 120VAC 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
This is a 120VAC input which 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 only be on when the
pump/remote dispenser is authorized or in manual mode. When the reset finishes its cycle, the
120VAC 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 would reset, but be unable 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 (120VAC or 240VAC), 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.)
Neutral Feed
This is the AC current return line back to the breaker panel for all attached devices (pump motor,
reset motor, solenoid valves). The gauge of this wire must be equal to that of the pump motor
feed (suction pumps) or submersible feed (remote dispensers).