Gasboy TopKAT Fuel Management System Installation - Manual (Page 96)

Mechanical PCU Option Control Lines for Mechanical Pumps/Dispensers
Page 90 MDE-4319E TopKAT™ Fuel Management System Installation Manual · August 2008
Control Lines for Mechanical Pumps/Dispensers
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/dispenser. Reading these descriptions
will give the installer a better working knowledge of the system and aid in planning the site
wiring.
Grounding
To ensure proper operation of the equipment and provide the necessary safety factors, this unit
must be grounded. A ground wire (preferably green) must be connected between the ground
wire of the system and the main electrical service panel. One earth ground connection is
required for each 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. We
recommend the neutral and ground bus strips be bonded together (unless prohibited by local
codes).
Reset Motor Feed
This is a 115 VAC input which is supplied through the pump handle switch to activate the
reset motor. This line should be switched through the TopKAT system and should only be on
when the pump/dispenser is authorized or in manual mode. Without power supplied to this
line, the pump/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 115 VAC 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 115 VAC.
Pump Motor Feed
This is a 115 VAC 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 TopKAT system and should only
be on when the pump/dispenser is authorized or in the Manual mode. When the reset finishes
its cycle, the 115 VAC input to the switch is passed through as an output causing the pump
motor to receive power and begin fueling. Without power to this line, the unit will reset, but
will 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 (115 VAC or 230 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 needs to be
adjusted to handle the load of two motors.
Note: 230 VAC is developed across a motor when the other leg of the motor is connected to a
Phase 2 Feed.