Installation
Wiring the Conduit Box
10
c.
There are two remaining blue wires in the submerged pump junction box. Connect either blue wire to one
side of the ‘on-off’ controls or switched ‘hot’ from the electronic dispenser or Isotrol (dispenser handle
isolation). The ‘on-off’ controls must be of explosion-proof construction if located in a hazardous location.
Connect the other blue wire to the appropriate terminal on the other side of the ‘on-off’ controls. See
specific wiring diagrams provided with the magnetic starters matching pump voltage, coil voltage and type
of pump control.
d.
Installations using loading racks only, may be connected for 2- or 3-wire control. For 3-wire control
(Figure 7), connect a black wire from terminal 3 in the magnetic starter to the ‘on-off’ switch. Connect a
red wire from terminal 2 in the magnetic starter to the ‘on-off’ switch. Connect either blue wire to the other
side of the ‘on-off’ switch and connect the other blue wire to L1 of the magnetic starter.
3-wire control requires the use of an auxiliary contact in the magnetic starter. This auxiliary
contact is standard equipment in the G.E. starters supplied by Red Jacket.
Installations with the magnetic starter in a hazardous location require explosion-proof
magnetic starters. The wiring is the same as for general purpose enclosures. (Section
1).
2.
Install proper overload heaters in magnetic starter matching starter manufacturer and amperage rating of the
pump.
3.
Motor Rotation
Where it is not convenient to predetermine the power supply phase rotation, proper rotation can be deter-
mined by pump performance. Pump head pressure and capacity will be considerably less than rated when ro-
tating backwards.
Connect the pump motor leads to terminal T1, T2 and T3 of the magnetic starter observing color code shown
in Figure 6 and Figure 7. With ample product in the tank and the system purged of air, start the motor and
make a pressure gauge reading of the system pressure with the discharge valves closed; or, open one valve
and calculate pumping rate.
Next, reverse power leads at L1 and L2. Repeat either pressure or capacity tests, as described above. If re-
sults are higher than the first test, the rotation of the second test is correct. If the second test gives lower per-
formance than the first, reconnect the power leads to L1 and L2 (as under test 1) for correct rotation.
Where the power supply has been properly marked L1, L2 and L3 in accordance with accepted phase rota-
tion standards, it is possible to predetermine the proper rotation of these units. The motor power leads are col-
or coded black, orange and red, and if connected through the magnetic starter to L1, L2 and L3 respectively,
the motor pump unit will rotate in the correct direction. It is recommended, however, that the performance
tests always be made whether or not the power supply has been properly “phased out”.
NOTICE
WARNING
