Liberty Pumps PRG-Series User Manual

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Direct Wiring of 115V or 230V,

Single Phase, Automatic Pumps

TEMPORARY

MANUAL

OPERATION

DO!

DON’T!

Fig. 4 Piggyback plug installation.

All "A" models (automatic pumps) come factory-equipped with a

float switch mounted to the pump. These models come with two

cords - one to the float switch and the other to the pump motor.

The switch cord has a series (piggyback) plug enabling the pump

(motor) cord to be plugged into the back of it (see Fig. 4). The

purpose of this design is to allow manual operation of the pump.

Note, on / off operation of the pump must be controlled by the

circuit breaker.
For automatic operation using Liberty's supplied switch, the two cords should be interconnected and plugged

into a separately fused, grounded outlet of proper amp capacity for your selected pump model. (See Section 1,

General Information, or the pump nameplate for electrical specifications of your model.) Both cords are equipped

with 3-prong plugs and must be plugged into a properly grounded 3-wire receptacle. DO NOT REMOVE THE

GROUND PRONGS.
In the event of switch failure, the pump cord can be separated and plugged into the electrical outlet, directly

bypassing the switch. For 115V and 230V single phase pumps should only be operated without the float switch by

using the circuit breaker or panel disconnect. Do not let the pump run dry.
The turn-on level of automatic "A" models is approximately 12" to 16" above the bottom of the basin. The turn-off

level is approximately 6" above the bottom of the basin. Other pumping differentials may be obtained by tethering

the switch cord to the discharge pipe. NOTE: A minimum cord length of 3.5" from the tether point to the top

surface of the float is required for proper switch operation. If using a differential other than the factory setting, be

sure when the pump shuts off at least 6" of fluid is left in the basin so the impeller remains submerged.

PRG Series pump models with an "M" designation are manual models with no switch. They are intended to

be run using an approved liquid level control or approved motor control with correct rating that matches motor

input in full load amperes. 3-phase models require the use of an approved motor control that matches motor input

in full load amperes with overload element(s) selected or adjusted in accordance with control instructions.

Automatic operation with optional control devices: If the pump(s) are to be operated by either a simplex or

duplex control panel, or other optional control device, follow the installation instructions provided with your specific

control and make the power connections per those instructions. If necessary, certain models may be run without

a separate control. 230V single-phase pumps should only be operated without the float switch by using the circuit

breaker or panel disconnect. Do not let the pump run dry.

ProVore

"A" and "M" models: If the pump is to be wired directly into a control device or junction box, and it is

necessary to remove the plugs, have a certified electrician do the wiring in accordance with the National Electric

Code and applicable local codes. See Fig. 5 for direct wire installation of single phase, automatic pumps.

In 230V installations,

one side on the line

going to the pump is

always “hot”, whether

the float switch is on or

off. To avoid hazards,

install a double pole

disconnect near the

pump installation.

Figure C – Direct wiring of 115V or 208-230V, single

phase, automatic pumps.