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Installation Manual
Submersible Sewage Pumps
LE and LEH-Series
Models
LE40-Series
LE50-Series
LE70-Series
LE100-Series
LEH100-Series
LEH150-Series
LEH200-Series
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.
7000 Apple Tree Avenue
Bergen, NY 14416
ph: 1-800-543-2550
fax: 1-585-494-1839
www.LibertyPumps.com
4/10 hp
1/2 hp
3/4 hp
1 hp
1 hp
1-1/2 hp
2 hp
Installer: Manual must
remain with owner/operator.
Keep this manual handy for future reference.
For replacement manual, visit LibertyPumps.com,
or contact Liberty Pumps at 1-800-543-2550.
Retain dated sales receipt for warranty.
Copyright © Liberty Pumps, Inc. 2022 All rights reserved.
Record information from pump nameplate:
Model:
Serial:
Mfg Date:
Install Date:
7034000N
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Summarization of Contents
Safety Information
Safety Guidelines
Explains the meaning of various safety alert symbols used throughout the manual.
Safety Precautions
Covers essential safety measures related to electric shock, fire, and injury risks.
Risk of Fire
Details hazards and precautions to prevent fires related to pump operation and installation.
Risk of Serious Injury or Death
Outlines critical safety warnings to prevent severe harm or fatalities.
Product Overview and Specifications
General Information
Provides basic instructions for pump installation and usage, emphasizing proper performance.
Inspection and Storage
Guides on how to inspect the pump upon arrival and store it properly before installation.
Operating Constraints
Explains how to size the pump correctly for intended installations to ensure optimal performance.
Model Specifications
Directs users to external resources for detailed pump models and specifications.
Installation and Preparation
Pump System Components
Introduces key components of the pump system, including control panels and float switches.
Float Switch Settings
Provides a table of factory-set float levels for various pump models.
Preparation
Covers essential steps before installation, including basin preparation and electrical safety.
Prepare New Sump [Basin]
Guides on excavating and backfilling for new sump basins, ensuring proper support.
Installation
Covers crucial installation aspects like electrical connections and pump placement.
System Configuration and Operation
Discharge
Explains the importance of check valves and proper discharge piping for pump function.
Vent
Describes the requirements for proper basin sealing and venting according to plumbing codes.
Piggyback Switch Operation
Illustrates how to operate the pump manually using the piggyback switch.
Automatic Pump Direct Wiring
Details direct wiring methods for 1-phase automatic pumps to control devices.
Simplex (One Pump) Systems
Outlines the typical installation steps for a single-pump system.
Duplex (Two Pump) Systems
Provides guidance on installing systems with two pumps for redundancy or increased capacity.
Operation and Maintenance
Starting System
Lists steps for verifying components and initiating the pump system operation.
Maintenance
Describes routine checks and maintenance tasks for the pump and system.
Troubleshooting
Troubleshooting Matrix
A table listing common problems, their causes, and corrective actions for pump issues.
Warranty Information
Liberty Pumps Wholesale Products Limited Warranty
Details the terms and conditions of the manufacturer's limited warranty for the products.
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