Ac Power Installation; Connecting Suction Pump Motor Power For Suction Pump Systems; Connecting The Communication Wiring - Bennett 3000 Series Installation Manual

Each dispenser uses one 115V, 50/60 Hz or 230V, 50/60 Hz circuit for dispenser power. Make sure the
power source has the correct frequency and voltage. You will connect the electrical circuit to the
terminal strip on the power / CPU board. Only one dispenser electronics Hot and Neutral needs to be
pulled per dispenser.
All references to 115VAC in this manual can also be identified as 230VAC if the dispenser ordered is for
230 VAC. Note: 115VAC installations: L1 is hot and L2 is Neutral. In 230VAC installations: L1 is hot
and L2 is the other phase hot.
Electronic Power Connections:
1. Connect the White (Neutral) 14ga. wire in 115V circuits or the Red 14ga. wire in 230V circuits to
terminal 1 of TS2 on the CPU board. The CPU board is located on the upper electronics door.
2. Connect the Black (Hot) 14ga. wire to terminal 2 of TS2 on the CPU board.
3. Electronic power must be connected to a dedicated 15 amp. circuit breaker.
Rules to ensure proper operation:
1. Each self contained dispenser uses one 115V, 50/60 Hz or 230V, 50/60 Hz circuit for dispenser
power. Put no more than two (2) dispensers on a circuit breaker (for Electronic Power).
2. Do not connect any other devices or motors to these circuits.
3. Put the pump wiring in it's own separate rigid metal, underground conduit. Do not put non-pump
related wires, such as price signs or intercoms, in the same conduit as pump wiring.
4. Use only the proper sized, stranded, gas and oil resistant THHN wire. Refer to the wiring diagram in
the back of this manual.
5. Do not use wire nuts anywhere in the pump wiring runs.
Connecting the Self Contained Pump Motor Power Wires
The defueler dispenser is a "Self Contained" unit. 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.
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 250 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.
Suction Pump Motor Control - Connect the Red 14ga. L1 - 120 or 240 VAC (HOT) wire from the first
motor power circuit breaker to terminal 4 of TS2 on the CPU
or the Black L2 240VAC wire from the motor power circuit breaker directly to the pump motor neutral
wire .
Note - You must check for Suction Pump operation (jumper setting) on the CPU board. Make sure that
there is NO jumper from P1 to P2 on the CPU board if you are controlling a suction pump motor. This
will be set at the factory.
Connecting the Communication Wires
For the RS-485 communication wires, use 18 gauge, twisted wires at 8 twists per foot. Refer to the RS-
485 Wiring Diagram in the wiring section of this manual. Connect the RS485 communication wires to
TS1 on the CPU as follows:
TS1 - 5 RS485 Negative (-) Yellow 18 ga.
TS1 - 6 RS485 Common Brown 18 ga.
TS1 - 7 RS485 Positive (+) Orange 18 ga.
108670 Rev A

AC Power Installation

16
Use 14-gauge stranded THHN wire
board. Connect the White 120VAC Neutral
08/04