Gasboy 9120K Series Installation - Manual (Page 32)

Installation AST Vent Line
Page 28 MDE-4567C 9120K and 9820K Series AST Pumps Installation and Operation Manual · September 2008
In order to provide the highest level of safety to you, your employees, and customers, it is
recommended that all employees be aware of the location and are trained on the procedure
for turning off power to the entire system.
• DO have the pump installed by a competent installer/electrician.
• DO install breakaway coupling on discharge hose. If using a high-hose retriever, install
breakaway approximately 12 inches (30.5 cm) downstream of hose clamp on nozzle side
of clamp.
• DO install emergency shut-off valve on supply pipe.
• DO install a model 52 valve for units not installed directly on top of the supply tank where
tank fuel level can be 1 ft below or any amount above the inlet to the AST pumping unit.
• The installation of the components must be performed in the following order: nozzle, whip
hose, breakaway, normal hose, hose clamp and AST.
• If you have an anti-siphon valve, set the spring to the lowest setting
Installation DO NOTs
• DO NOT experiment with a pump if you are not sure that the installation is correct.
• DO NOT overload sub or main breaker panels.
• DO NOT use power line wiring of inadequate capacity (use gauge specified by the wiring
diagram or the wire chart provided in “Wiring” on page 9 ).
• DO NOT use a circuit breaker of improper size (refer to “Wiring” on page 9 ).
• DO NOT use the Gasboy fuel pumping equipment to remove water ballast from the
storage tank.
• DO NOT use gaskets on covers of explosion-proof type boxes. The sealing compound
found around wires at various locations within the conduit is a requirement of the National
Electrical Code and should not be disturbed. Ensure that the mating surfaces between the
J-Box and cover are free of dirt, debris, nicks and scratches. Tighten J-Box covers before
replacing panels.
• DO NOT use knock-out boxes or flexible conduit for installing this unit. All power and
lighting wires should be run in threaded, rigid, metal conduit. All threaded connections
must be drawn up tight. All but one opening in the power J-Box are provided with plugs at
the factory. At completion of the installation, it is the installer's responsibility to ensure
that any unused openings are plugged.
AST Vent Line
The vent line for standard units is vented to the atmosphere. Whenever possible, it is
recommended that the line be returned to the tank. A hole is provided above the normal vent
opening to allow this line to exit the pumping unit and return to the tank.