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Installation of the RC Networks
An RC Network is an electrical noise suppression device. It is used on AC power devices such as coils
and across relay contacts. 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
computer systems. RC Networks work to limit the size of the AC voltage spikes to acceptable levels.
RC Networks must also be used on motor relay contacts to suppress the noise from the arc and noise
spikes that are caused by the relays opening and closing.
Warning: Failure to properly install the RC networks voids the equipment warranty.
The submerged pump motors are controlled by an auxiliary pump motor relay. Follow this procedure to
protect dispenser computer operation:
1. Turn off all related circuit breakers when servicing submerged pumps or dispensers.
2. Use an RC Network on the coil circuit and across the contacts of each submerged pump motor
control relay (typical Red Jacket style box.) See Installation Wiring Diagram Figure 14a.
3. 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 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 in the electronic enclosure. Connect the
120 or 240VAC motor circuit to the dispenser terminal strip.
minimum for runs under 50ft, 12Ga., for runs to 100ft and 10ga., for runs over 100ft.
Termination of Field Wiring for Pump Motor Power of Self-Contained Dispensers.
Follow the chart below by locating the model number of the dispenser you are installing in the chart.
The individual motor power circuits are identified by the notation 1st, 2nd, 3rd or 4th as the model
requires. Connect the designated motor power circuit wire to the power board terminal strip position as
indicated in the chart. Warning the terminal sequence does not necessarily follow the sequence of the
products. For example a two product dispenser connects to the "A" product relay output and the "D"
product relay output ( not the "B" as you might expect). Connect the opposite end of the product control
wire to the motor coil.
Note:
With self-contained units the 4-inch red pig tail wires located on the Power Board must be
moved from T1 to T2; T3 to T4; T5 to T6 and T7 to T8. This will connect the motor power circuit through
the on-board relay to the motors. Failure to move these wires will result in a blown fuse F1.
1st Product: Connect the Red 14ga. L1 - 120 or 240 VAC (HOT) wire from the first motor power circuit
breaker to the power board terminal 4. Connect the White 120VAC Neutral or the Black L2 240VAC
wire from the first motor power circuit breaker to the power board terminal 5. NOTE: move the jumper
wire on the dispenser power supply board from Tab T1 to Tab T2.
2nd Product: Connect the Brown 14ga. L1 - 120 or 240 VAC (HOT) wire from the 2nd motor power
circuit breaker to the power board as indicated in the chart below. Connect the White 120VAC Neutral
or the Black L2 240VAC wire from the 2nd motor power circuit breaker to the power board as indicated
in the chart below. NOTE: move the jumper wire on the dispenser power supply board from Tab T3 to
Tab T4.
3rd Product: Connect the Blue 14ga. L1 - 120 or 240 VAC (HOT) wire from the 3rd motor power circuit
breaker to the power board as indicated in the chart below. Connect the White 120VAC Neutral or the
Black L2-240VAC wire from the 3rd motor power circuit breaker to the power board as indicated in the
chart below. NOTE: move the jumper wire on the dispenser power supply board from Tab T5 to Tab T6.
Use 14-gauge stranded THHN wire
21
105894 Rev G 12-6-16
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