Gasboy Atlas Fuel Systems Installation Manual - Manual (Page 22)

Control Lines for Atlas Electronic Series Submersible Starter Drive (Subm Starter Drive)
Page 4-4 MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014
Units with Submersible Pump Drive Relay Option
Power for the submersible pump drive line originates from the motor feed input. Units
equipped with optional relays for direct submersible pump drive can be connected directly to
submersible pumps up to 3/4 HP at 115 VAC, or 1-1/2 HP at 230 VAC. The gauge of this wire
must be determined according to the size of the motor, the voltage at which the motor will be
powered, and the distance from the breaker panel to the pump.
Submersible Starter Drive (Subm Starter Drive)
The submersible starter drive is a 115 VAC (230 VAC International) output used to control a
submersible starter relay. Two lines are provided for twins. This line is capable of supplying
300 mA of AC current to control the coil of the submersible motor contactor (starter relay).
This is sufficient for directly connecting to popular models, but if in doubt, check the contactor
(relay) manufacturer’s data sheet for the sealed VA rating. Divide the sealed VA by the coil
voltage to determine the current. This line must not be connected directly to the submersible
pump, shorted to any conduit or chassis metal, or incorrectly wired; otherwise, the Central
Processing Unit (CPU) Printed Circuit Board (PCB) will be instantly damaged. This line must
be left capped when not in use. To avoid accidental damage, follow checks before applying
power.
Note: When multiple dispensers are used to control a common submersible starter relay or
pump, and the Atlas commercial electronic unit is controlled (authorized) through the
auth/pump motor feed line (as in the case of some FMSs), it is important that lines from
the Atlas commercial electronic unit to the submersible equipment be isolated from
each other. This can be accomplished by running submersible control lines through a
secondary set of relay contacts in the FMS. If a secondary set of contacts is not
available, external control relays must be used between the Atlas commercial electronic
unit and the submersible starter relay or pump. Another option is to provide a separate
submersible starter relay for each hose outlet. In no case must the submersible drive
lines from the Atlas commercial electronic unit be tied together.
Submersible Pump Drive (Subm Pump Drive)
The submersible pump drive is not available on all Atlas models for remote dispensers, and is
active only when submersible drive relays are supplied. The submersible drive is a
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115/230 VAC (230 VAC international) output used to control the submersible starter relay or
submersible pump. When connected directly to the submersible pump, the motor size cannot
exceed 3/4 HP at 115 VAC, or 1-1/2 HP at 230 VAC. Two lines are provided for twins. In cases
where both lines control the same starter relay or pump, they can be combined. This line is
also used to control an external valve used on AST installations.
Note: For situations where more than one-hose outlet uses the same submersible pump, refer
to the note in “Submersible Starter Drive (Subm Starter Drive)” .