Gasboy 9120K Series Installation - Manual (Page 28)

Control Lines Pump Motor Feed
Page 24 MDE-4567C 9120K and 9820K Series AST Pumps Installation and Operation Manual · September 2008
Pump Motor Feed
Model 9120K and 9820K
The Pump Motor Feed is a 115 VAC (230 VAC International) input which is required to
power the pump and authorize the control line. This line is used to provide authorization for
the unit (when enabled through the Dual In-line Package (DIP) switches). The Pump Motor
Feed supplies power to the electric motor as well as base unit electric reset, valves, and so on.
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 however does not supply power to the motor
for 3-Phase motors. Separate wiring is required for 3-Phase motors. Pump Motor Feed wires
must not be used to supply the Micro Neutral/Feed.
If the line to the Model 9820K is controlled by a fuel management system using solid state
relays, a resistor assembly must be installed between the Pump Motor Feed line and Neutral
Feed to prevent false triggering of the authorization input. The resistor assembly is 8.2K Ohm,
10 Watt (P/N C05818) for 115/230 VAC domestic and 30K Ohm, 10 Watt (P/N C06683) for
230 VAC international wiring.
Neutral Feed
The Neutral Feed is the AC current return line back to the breaker panel for all attached
devices. The gauge of this wire should be equal to that of the Pump Motor Feed. Together with
the pump feed, it supplies power to the motor, reset and so on.
Switch Detect
Switch Detect is a 115 VAC output, which is used to indicate that the reset is complete and the
9280K compact commercial pump unit is ready to dispense the product. It should only be used
when monitoring of the pump unit is desired (as when used with a fuel management system).
This line is active when the motor is turned on and comes up to speed. It must be capped when
not in use.