Installation
Wiring the Conduit Box
9
Wiring Instructions- 208-230 Volt Single Phase Pumps
The motor control box must be located away from the fueling area in a non-hazardous location (see Figure 3).
1.
Connect the single phase 208-230 V power supply from the distribution panel to terminals L1 and L2 in the
motor control box. Each control box should be wired through a separate fused disconnect switch or circuit
breaker (including neutral, when used), furnished by customer.
2.
Using properly color coded wires, connect wires from the red, black, orange and two blue terminals on motor
control box terminal strip to the corresponding color coded wires in the junction box of the proper submerged
pump.
The “on-off” control station must be of explosion-proof construction. Where loading racks and dispensers are
served by the same submerged pump, the 2-wire switches must be connected in parallel so the submerged
pump can be controlled from any dispenser or any loading rack.
3.
Connect wires from terminal Blue-1 and terminal 3 in motor control box to dispenser control switches (if
dispensers are used) and “on-off” switch at loading rack as shown in Figure 3.
4.
The pumps are equipped with a no-liquid, over-temperature switch in the motor and an overload switch in the
motor control box which will cut out if the motor is overloaded. If the pump fails to operate, or stops, when
there is sufficient product in the storage tank, check the manual overload reset switch in the control box cover.
Wait 10 minutes for the overload protector to cool off and then press the reset button.
If the reset button will not stay in position this indicates an overloaded motor, or a
short to ground. This condition must be corrected. If the reset button stays in but the
motor will not pump or continue to run, the tank is dry.
5.
If an external pilot light is desired to indicate when the submerged pump is operating, wire as shown in
Figure 3, Figure 4 or Figure 5. Should this light continue to burn when all switches atdispensers and loading
racks are off, this indicates that one of the dispenser switches is out of adjustment. On installations with no
external pilot light, the submerged pump should be checked to make sure it is not operating when all switches
are turned off.
6.
The magnetic contactor coil is shipped ready to accept 208-230 volts. No changes are required unless a 110-
120 volt coil is desired.
Wiring Instructions - 208-230, 380/415 or 575 Volt Three-Phase Pumps
On some installations, “phase converters” are used to obtain a three-phase power supply
from a single-phase power source. The use of phase converters may cause an imbalance
between the three phases and cause damage to the motor. For this reason, these
requirements must be followed in order to maintain warranty coverage.
• Static phase converters must not be used. Only rotary or electric phase converters are
allowed.
• The horsepower rating of the phase converter must be equal to at least three times the
horsepower rating of the pump(s).
• Current imbalance must not exceed 10% under varying flow conditions.
• Proper three-leg quick trip overloads must be used.
1.
Installations where the magnetic starter is located away from the loading rack in a nonhazardous location. (See
a.
Connect the three phase power supply from the master panel to terminals L1, L2 and L3 in the magnetic
starter.
b.
Using properly color coded wires, connect a black wire from terminal T1 in the magnetic starter to the
black motor lead, in the junction box of the proper submerged pump. Connect an orange wire from starter
terminal T2 to the orange motor lead and red wire from terminal T3 to the red motor lead. (See Figure 6
and Figure 7.)
CAUTION
NOTICE
