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2.8 Electrical
This RO machine requires two supply voltages; the control voltage and the
pump motor voltage.
2.8.1 Single-Phase Electrical
The control voltage can be connected to either a 115 VAC, 60 Hertz or
220 VAC, 50 Hertz single-phase power supply. The RO control circuit
should always be installed on at least a 15 Amp, single-phase dedi-
cated circuit. Reverse osmosis machines with 115 VAC, single-phase
control voltage include an eight-foot (2.4 m) cord which plugs into a
three-prong grounded receptacle. All machines shipped with a
220 VAC, single-phase control circuit are shipped with an eight-foot
electrical cord, but customers must provide electrical plug.
2.8.2 Three-Phase Electrical
The three-phase pump motor requires a 15 AMP dedicated circuit.
Always verify correct voltage and Amp rating by checking voltage tag
on the starter box or by checking electrical specifications on the
pump. The motor is wired for 460 Volts, 60 Hertz, three-phase voltage
from the factory (Figure 2.1, Three-Phase Allen Bradley Motor Starter).
The pump motor can be rewired to 208 or 230 Volts. If this is done, a
wiring change must be made internally in the pump motor and a
higher amperage relay and starter may need to be installed. All field
wiring must comply with applicable local and national electrical
codes.
After checking the voltage tag on the motor starter to ensure the
available voltage and amperage are correct, connect the provided
three-phase power to the motor starter (Figure 2.1). This can be done
by connecting the three phase power to the top of the starter relay
terminals: L1, L2, and L3. A separate, fused disconnect for the motor
wiring with proper protection for the Horsepower and Amp draw of
the motor is recommended. All field wiring must comply with applic-
able local and national electrical codes. See Figure 2.1 for three-
phase Allen Bradley Starter Hook-Up.
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