Liberty Pumps LGH Series - User Manual

Copyright © Liberty Pumps, Inc. 2022 All rights reserved.
Installation Manual
For pressure sewer applications, verify a Redundant
Check Valve Assembly (curb stop and check valve) is
installed between the pump discharge and the street
main, as close to the public right-of-way as possible, on all
installations to protect from system pressures.
Installer: manual must remain with owner or
system operator/maintainer.
Record information from pump nameplate:
Model:
Serial:
Control Panel:
Mfg Date:
Install Date:
Dealer:
Dealer Ph:
7000 Apple Tree Avenue
Bergen, NY 14416
ph: 1-800-543-2550
fax: 1-585-494-1839
www.LibertyPumps.com/LEP
60 Hz
7550000H
LGV-Series
LGH-Series
Ordinary Location Models
XLGV-Series
XLGH-Series
Approved for Hazardous Locations
Class 1, Division 1, Groups C and D T4
Class 1, Zone 1, Groups IIA
and IIB T4
3–15 hp
Submersible
Grinder Pumps

Summary

Safety Precautions

Risk of Electric Shock

Warnings and safety measures related to electrical hazards during operation and maintenance.

Risk of Fire

Warnings and safety measures to prevent fire hazards.

Operating Constraints

Overload Protection

Power and Control Cords

Wiring Instructions

Permanent Cord 1-Phase Wiring

Wiring diagram for 1-phase pumps with permanent cords manufactured prior to 03/01/2021.

Permanent Cord 3-Phase Wiring

Dual Voltage 3-Phase Pumps

Dual Voltage Hazardous Locations Pumps

Rewire Dual Voltage Pumps

Preparation

Installation

Cutter and Impeller Free Movement Check

Procedure to verify free rotation of the cutter and impeller before pump installation.

Electrical Connections

3-Phase Pump Rotation Verification

Method to verify correct clockwise rotation for 3-phase pumps before installation.

Thermostat and Seal Failure Connections

Discharge

Operation

Starting System

Maintenance and Troubleshooting

Maintenance

Troubleshooting

Field Service on Hazardous Location Pumps

Warranty

Liberty Pumps LGH Series Specifications