Gasboy 9120K Series Installation - Manual (Page 27)

MDE-4567C 9120K and 9820K Series AST Pumps Installation and Operation Manual · September 2008 Page 23
Purpose Control Lines
4 – Control Lines
Purpose
The purpose of this section is to familiarize the installer with the control inputs and outputs
that are available for the 9X20K Series. It is recommended that installers read these
instructions to obtain a better working knowledge of the unit in order to guide them in
planning the site wiring. Refer to
“Wiring” on page 9 for a specific wiring diagram and
installation notes.
Ground
To ensure proper operation of the equipment and provide the necessary safety factors, a good
ground line must be provided. A ground wire (preferably green or green with yellow stripe)
must be connected between the unit’s AC J-Box ground lug and the main electrical service
panel. One (1) earth ground connection is required per unit. The ground rod should be a solid
corrosion-resistant conductor and must be installed at the main electrical panel in accordance
with the National Electrical Code. It should be properly tied into the ground bus strip of the
panel. We recommend the neutral and ground bus strips be bonded together (unless prohibited
by local codes).
Note: Do not rely on conduit grounding in lieu of a ground wire.
Micro Feed
The Micro Feed (electronics AC hot line) is a 115 VAC (230 VAC International) input
required to power the microprocessor of the register's electronics. This power must always
remain on and must be on a separate breaker from the control lines (Pump Motor Feed). In a
site configuration using multiple units, the power for the microprocessors of up to 8 units can
be supplied by one breaker.
Micro Neutral
The Micro Neutral is a return line for AC current from the microprocessor of the pumping unit
to the breaker panel.