Syn-Tech Systems FuelMaster FMU-2500 Classic Installation Manual page 84

Perform the following to control motors:
1) Inside the dispenser junction box, locate the wire feeding the pump motor for hose 1. It is
most likely a red or orange wire from the dispenser reset mechanism wire-nutted to one of
the motor leads (or contact starter). There should be power present when the dispenser
pump handle is turned on, and power should be removed when the pump handle is turned
off. If the motor is powered by 220 VAC, the second motor feed will be from another power
source, and power may be present on the RESET COMPLETE line when the pump handle is
turned off.
To avoid electrical shock, remove dispenser and motor power at the circuit breaker panel. If the motor is
powered by 220 VAC there may be a second motor power wire from a second circuit breaker. Use a
multimeter to verify power is removed from all motor power wires before proceeding.
Pour éviter tout choc électrique, enlever le distributeur et la puissance du moteur au panneau de
disjoncteurs. Si le moteur est alimenté par 220 VAC il peut y avoir un fil second moteur électrique à
partir d'un deuxième disjoncteur. Utiliser un multimètre pour vérifier l'alimentation est coupée de tous
les fils d'alimentation du moteur avant de procéder.
2) Remove dispenser and motor power.
3) Run two wires from the FMU to the dispenser junction box.
4) In the FMU, connect one wire to LN1, and the second to LD1.
5) In the dispenser, disconnect the pump motor feed wire found in step 1).
6) Connect the wire running from LN1 to the red or orange RESET COMPLETE wire.
7) Connect the wire running from LD1 to the MOTOR FEED wire. This is usually a black wire.
8) Repeat steps 1 through 7, as required, for all additional hoses.
c. Controlling Solenoid Valves. See Figure 4-11. When controlling a classic or DoD FMU, and
pump handle detection is needed, the control method most likely used will be controlling motors
or controlling solenoid valves. When solenoid valves are present, they should be controlled.
There must be one solenoid valve per hose. Solenoid control interrupts power from the
dispenser reset mechanism to a solenoid valve. This control method has a drawback. It will
permit dispenser reset and pump motor activation without authorization. If a user does not turn
off the pump handle when the transaction is complete, the reset and pump motor will continue to
run. This can result in a pump motor overheating. Pump handle detection is possible from all
variations of FMUs.
Solenoid valves may be single or two-stage. A two-stage valve is illustrated in Figure 4-11.
Single stage valves will have two wire leads which are not polarity sensitive, usually both black.
Power is wired to one lead, and neutral to the other. Two-stage valves have three leads: a
neutral and separate inputs for the fast and slow side of the valve. Presets for retail transactions
will make use of two-stage valves to ensure credit card payments by retail customers don't
exceed the requested amount. When the two-stages do not need to be separately controlled,
they may be tied together as shown in Figure 4-11.
Hose reels in a garage may use this control method. The major difference will be the power
source. Hose reels are not typically tied to a power source, so one must be added. The power
source will be dependent upon the requirements of the solenoid valve used to control the hose
reel. A power supply may be installed in the FMU pedestal to provide power to the solenoid
valve.
FuelMaster
®
AVERTISSEMENT
Installation Manual
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82