Wayne Ovation - Full Service (Stand-Alone) Dispenser Wiring; Multiple Dispenser Wiring

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November 2008 Part No. 920559 Rev H
2.6.4 Full Service (Stand-Alone) Dispenser Wiring
For full service operation, make electrical connections as shown on the Installation Wiring Diagram in
Appendix B. The electrical connections illustrated are typical when additional like model dispensers are
used.
Data wires shown on the wiring diagram are for connecting the dispenser to the Data Distribution Cabi-
net and the Site Controller Cabinet in a Wayne Control System. These data wires are not required for the
full service (stand-alone) dispenser. However, the six optional data wires and cable, whichever are
applicable, as described in Section 2.6.2, should be run at initial installation if a control system or
optional equipment is being installed or may be installed in the future.
Remote dispensers require a relay to control the submersible pump motor. These relays are available as
an option with the Wayne control system. If the dispenser is not connected to a Wayne control system, a
UL Listed magnetic motor controller assembly, constructed with Potter and Brumfield Relay No.
PRD7AYO (120) or equivalent, shall be used.
A maximum of 12 dispensers (24 fueling points) may be connected to a single PRD7AYO (120) relay;
other relays may have different limitations. All dispensers operating the same pump control relay must
be connected to the same circuit breaker; this may require multiple control relays for a submersible
pump.
Ensure that the submersible pump receives its power from its own separate circuit breaker as illustrated
in the Typical Site Wiring Diagram in Appendix B.
2.6.5 Multiple Dispenser Wiring
A primary requirement in dispenser installation wiring is to provide a means for disconnecting all power
connections, including the neutral, to the dispensers for safe shutdown and servicing of the units. Each
dispenser could be provided with a separate control Power Circuit Breaker. If this is not desirable or
practical, several dispensers can be grouped together and tied to the same Control Power Circuit Breaker
as illustrated in the Typical Site Wiring Diagram in Appendix B. A group of dispensers would then con-
sist of all the dispensers and associated Submersible Pump Control Relay coils supplied by the same
Control Power Circuit Breaker.
When more than one dispenser within the group activates the same submersible pump, the Relay Select
lines may be commoned at the Submersible Pump Control Relay Coil terminal up to a maximum of 12
connections (24 fueling points). Where more than 12 connections activate the same submersible pump,
additional relays should be used and the contacts paralleled as illustrated in the Typical Site Wiring
Diagram.
In larger installations, dispensers can be separated into multiple groups.