Electrical Field Wiring - General Information - Bennett 3700 Series Installation Manual

Electrical Field Wiring
General Information
Electrical Wiring Section -
For 3700 go to page 20
For 3800 go to page 38
Find the wiring diagram specific to the dispenser model for the dispenser that is being installed in the
Wiring Diagrams section. Read and follow all directions including supplemental notes contained on the
drawing.
The dispenser's field wiring connections are in the upper electronics head (electrical enclosure ) of the
dispenser. Or, the dispenser may have been ordered with the optional explosion proof junction box
located in the lower area of the dispenser. Using the door keys shipped with the dispenser, (on side 1)
unlock the two locks on the upper electronics enclosure and open the door to access the wiring terminal
on the CPU/ Control board. If there is a junction box then wire to the terminal strip and flying leads in
the junction box. Refer to the instructions for wiring to the junction box under the "Wiring Diagrams"
section of this manual.
All field wiring must be stranded copper, oil and gas resistant (THHN) color coded, with a 600 volt
insulation rating. See wiring diagrams section for proper wire sizes. Pull 72" extra wire to reach the top
of the dispenser. Do not use wire nuts. The ends of the wires should be clean and free from oxidation.
The wire separator (supplied with the pump) must be installed on the wires as they exit the conduit
located in the electrical enclosure before the wires are terminated in the electronics enclosure. The wire
separator is needed to properly seal the conduit in the last step of installation.
Underground conduit for the field wiring must be 3/4", rigid metal and continuous. The use of PVC
conduit is not allowed. All conduit between the building and each dispenser should be a separate
conduit run.
For Remote dispensers Bennett requires the installation of RC networks across the coil and contactors
of the sub-pump relays for proper operation of the dispenser. Failure to install the RC networks will void
Bennett's limited warranty.
Intercom wiring must be in a separate conduit from the dispenser conduit. DO NOT install intercom
wiring in the same conduit as the dispenser wiring or else the Bennett Warranty will be voided and
improper system operation will result.
Dispenser Electronic Power must be on a separate dedicated circuit breaker. Do not put submerged
pump or self-contained pump power on this circuit breaker. Up to two dispenser may be placed on (1)
15 amp circuit breaker. No more than two dispensers per 15 amp breaker. All dispensers at the station
must be on the same phase of power.
All dispenser field wiring between the building and the dispenser for power, neutral and ground wire
conductors must not be spliced, wire nutted or shared with any other equipment. Doing so would void
the Bennett Limited Warranty. All power, neutral and ground conductors shall be run from the dispenser
to the Main Service Panel.
Follow all local, state and federal requirements for installation of vapor seals.
Electrical contractors must pull 72" of wire above the grade level to reach through the
dispenser's conduit and into the electrical area at the top of the dispenser. Read and follow all
instructions on the wiring diagram and observe all national and local electrical codes.
120001 Rev K 1-19-18
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