Installing Rc Networks; Connecting Suction Pump Motor Power For Suction Pump Systems - Bennett 3700 Series Installation Manual

Commercial and retail dispensers. spec. 100 (2nd generation). remote dispensers and self-contained pumps

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Service manual (88 pages)

Table of Contents

An RC Network is an electrical noise suppression device (see figure 16 and figure 17). It is used on AC

power devices such as coils and across relay contacts. When AC voltage is applied to coils they are

converted to electromagnets. Coils are used to operate AC devices, such as solenoid dispensing valves

and AC power relays or contactors. When the AC power is removed from a coil, the electromagnetic

field collapses. This causes an AC voltage spike as high as 1500 VAC which can affect electronic

systems.

Figure 16 - An RC Network.

Install the three RC Networks in the Control Relay Box across the following (Refer to the Remote Power

Wiring Diagram in the Wiring Section of this manual):

Check local code requirements concerning complete disconnect of submerged pump voltages. RC

Networks will allow voltage to be present at all times.

Connecting Pump Motor Power for Suction Pump Systems

Connecting Pump Motor Power for Self-Contained Pumps

Self-contained dispensers have the pump motor mounted in the lower hydraulic area. The power is

passed to the pump motor using the pump motor relay located on the CPU board in the electronic

enclosure. Use 14-gauge stranded THHN wire minimum for the suction pump motor wires for runs

under 50ft. 12Ga. for runs to 100ft, 10ga.for runs over 100ft, and 8 ga. for runs over 200 feet. Pump

motor power must be on a different phase leg than the dispenser power or system malfunction

will result and the Bennett Limited Warranty will be voided.

Termination of Field Wiring for Pump Motor Power of Self-Contained Dispensers

Note:

Wire termination for 3-phase Motor Connections for 3000 series self-contained pumps with 210

or 531 electronics will be terminated directly to a 3-phase contactor relay or terminated to a

contactor board as shown in Figure 18.