Pump Wiring Instructions - Zoeller X71 Series Owner's Manual

Submersible grinder pump

Table of Contents

Installation and checking of electrical circuits and hardware should be performed by a qualified licensed electrician.

"Risk of electrical shock" Do not remove power supply cord and strain relief or connect conduit directly to the pump.

Power cords, sensor cords, and float cords all must be sealed to prevent gases from the basin entering the control panel.

CAUTION

It is very important that these units be connected for proper rotation. Since no rotating parts are visible without removing the pump from the pit,

the rotation on 3 phase units should be checked before installation into the pit as follows:

After the proper electrical connections are made, momentarily energize the pump observing the direction of kick back due to starting torque. The rotation is

correct if the kick back is in the opposite direction of the rotation arrow. If the rotation is not correct, disconnect power and switch any two power leads. Turn

power back on and retest for proper rotation.

The sensor cable is the smaller cable, which contains 5 wires. The red and orange wires connect to the thermal cut-out circuit and the black and white wires

connect to the seal leak probes. The green wire is a ground connection. All 5 wires must terminate in the control panel.

The following should be noted:

(1) The thermal sensors are normally closed and mounted adjacent to the motor windings. If internal temperatures exceed a maximum limit, the pump will

deactivate when the red and orange wires are connected in series to the control coil of the motor starter circuit. The pump is able to restart once the motor

cools down. Continued deactivation of this circuit requires the attention from maintenance personnel.

(2) The black and white seal leak wires are connected to a 330K ohm circuit in the seal cavity, where 2 seal leak probes are housed. An indicator light will

activate whenever water is present in the cavity. Whenever the seal leak light is activated, indicating that the lower seal has failed, the pump should be

removed and serviced in order to avoid damage to the motor.

(3) The green wire shall be connected to a ground lug in the panel.

These pumps require a control panel. The control panel rarely requires an explosion proof rating since it is usually located outside the hazardous area. A motor

starter circuit, control circuit, and alarm circuit within the panel are standard features. Outdoor enclosure ratings and alternating relays are often required. Vari-

able level float switches are the most common level sensing device.

The following should be noted:

(1) Float switch connections must be intrinsically safe.

(2) Single phase units have externally mounted capacitors and starting relays. Your control panel should have provisions for mounting these starting compo-

nents.

(3) The seal failure sensor and thermal sensor protection shall be incorporated into the panel.

(4) All pumps require overload protection in panel. Use with approved motor control that matches motor input in full load amperes with overload element(s)

selected or adjusted in accordance with control instructions.

(5) Hazardous Location pumps require panels that offer intrinsically safe relays and all other NEC requirements must be followed (See Article 500,501, 502

& 503 plus any others that apply.)

POWER AND SENSOR CORD, LEAD IDENTIFICATION

BLACK

WHITE

RED

GREEN

GROUND

LEAD

POWER

CORD