Figure 4-9. Wiring Diagram - Controlling Reset In Dual Hose Single; Product Dispenser Without Backfeed (One Solution) - Syn-Tech Systems FuelMaster FMU-2500 Classic Installation Manual

FuelMaster Installation Manual
®
Figure 4-9. Wiring Diagram - Controlling Reset in Dual Hose
Single Product Dispenser without Backfeed (One Solution)
b. Controlling Motors. See Figure 4-10. When controlling a classic or DoD FMU, and pump
handle detection is needed, the control method most likely used will be controlling motors or
solenoid valves. If solenoid valves are not present, motors must be controlled. There must be
one motor feed per hose. Motor control interrupts power from the dispenser reset mechanism to
a suction pump motor or contact starter for a submersible pump motor. Siphoning from
aboveground tanks is possible if solenoid valves or anti-siphon valves are not present. Pump
handle detection is possible from all variations of FMUs.
Motors may be suction pump or submersible. Suction pump motors will most likely be wired
directly to the dispenser reset mechanism. Submersible motors will most likely be controlled by a
contact starter being powered through the dispenser reset mechanism. The contact starter will
be remotely located away from the dispenser.
80