Gasboy 9120Q Series - Manual (Page 16)

GASBOY Series 9120Q
10 9120Q Compact Commercial Pumps
•
March 2004
Grounding
To ensure proper operation of the equipment and provide the necessary safety factors, this unit
must be grounded. A ground wire (preferably green) must be connected between the unit’s AC
junction box ground lug and the main electrical service panel. One (1) earth ground connection is
required per unit. The ground rod is to 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).
Circuit Breakers
Power to the unit should be supplied from a dedicated breaker. No other equipment should be
powered from this breaker. A tag on the motor identifies the maximum current draw of the motor.
If two (2) pumps are supplied from one breaker, that breaker must be capable of handling the load
of both motors. Provisions must be made to break both legs of any AC circuit.
The Pump Motor
Pumps are shipped from the factory with motors wired according to the specifications given on the
order as to kind of current, frequency and voltage.
Very often on installation, it becomes necessary to change the original setting to suit the AC
power source. To do this, locate the motor changeover plate, typically located on the shaft end of
the motor, and remove the screw which secures it in place. Slide the plate so that the desired
voltage, as marked on the plate, lines up with the screw hole. Reinsert the screw and secure the
plate in place.
Many motor failures result from improper setting of the motor change-over plate. If set for 115
VAC and a 230 VAC feed is used, the motor will burn out after running only a short time. If set
for 230 VAC and a 115 VAC feed is used, the motor will run very slowly and the starting field
will soon burn out.
Wire Size
The AC wire size of the Control Lines of a Pump (Pump Motor Feed, Neutral Feed, Phase 2 Feed)
is dependent upon the HP rating of the pump motor, the voltage at which the pump will be
operated (115/230), and the distance from the circuit breaker panel to the pump. In cases where
two pumps are powered from the same breaker through the same wires, the gauge of the wires
should be increased to handle the added load according to the distance from the breaker panel.
The chart below should be used as a guide in selecting the proper wire size according to the
specific installation requirements.
The AC wire size for the Switch Detect lines should be 14 AWG (when they are used).
The DC wire size for the Pulser lines must be 18 AWG (when they are used).
115 VOLT WIRE GAUGE SIZES PER FEET OF RUN
Motor
HP
25’ 50’ 100’ 150’ 200’ 250’ 300’ Over 300’ Use Relay At
Motor Location
3/4 14 12 10 8 6 6 4
230 VOLT
3/4 14 12 12 10 10 10 8