Liberty Pumps LSGX202-RE - Manual (Page 4)

©Copyright 2012 Liberty Pumps Inc. All rights reserved - 4 -
2-1 INTRODUCTION
This manual was prepared to assist you in the correct installation, operation, and maintenance of your Liberty Pump. Please
read it completely before installing the pump. Make certain that you are familiar with the contents, and the chapters on
installation and operation are fully understood before running the pump.
Liberty pumps are designed for minimal maintenance. However, regular checks will ensure longer life and greater operating
reliability.
WARRANTY: No repair work should be carried out during the warranty period without prior factory approval. To do so may
render the warranty void.
SERIAL # : In all correspondence and reports, make certain that the pump serial number is given.
2-2 DESIGN OF PUMP
The grinder pump contains metal parts that rotate at high speeds. Be careful around pump base
while power is connected. Make sure that the pump is either in the tank or clear from people and wires when in
operation.
1. The Liberty grinder pump is designed for continuous underwater operation; the induction motor is insulated against heat and
moisture.
2. A thermal overload protector is imbedded in the stator windings. This is connected in series and wired to shut down the pump
if overheating occurs. The overload switch resets automatically when the motor cools.
3. The motor is protected against damage from water entry by a mechanical face seal with two silicon-carbide faces.
4. The impeller and volute are designed for efficient flow characteristics and clog-free operation. The hardened cutters grind
solids and fibrous matter into small particles that can be safely pumped through small diameter piping.
5. For sewage systems, consult local plumbing codes on requirements of venting the tank. The pump shall not be installed in
locations classified as hazardous in accordance with the National Electrical Code, ANSI/ NFPA70.
NOTE:
The major material of Liberty Grinder Pumps is cast iron. They should not be used to pump corrosive liquids.
3-1 INSPECTION UPON RECEIPT
The shipping container should be immediately inspected for damage that may have occurred in shipment. Exercise care in
opening the shipping container to avoid damage to the pump. Remove any blocking and cushioning from within the container.
Check all cushioning for spare parts before discarding. Visually check the pump and any spare parts for damage. Check for
damaged electrical wires, especially where they exit the motor housing. Report any damage or shortage of parts. The cutter
located at the bottom of the pump should be turned several rotations clockwise. This will insure that the impeller and cutter
are free of any seizure due to prolonged storage. If the impeller is not rotated, the pump may fail to activate. If the impeller’s
rotation is difficult or completely resistant, adjustments must be made.
3-2 STORAGE BEFORE USE
Liberty pumps are shipped from the factory ready for installation and use. They should be held in storage if the pump station
is not complete. If storage is necessary, the pump should remain in its shipping container. It should be stored in a warehouse
or storage shed that has a clean, dry temperature-stable area where the pump and its container should be covered to protect it
from water, dirt, dust, etc. The ends of the cables - (plugs) must be protected against moisture.
AT NO TIME SHOULD THE PUMP BE STORED WITHIN AN INCOMPLETE WET PIT OR BEFORE
POWER CAN BE SUPPLIED. THE PUMP SHOULD NOT BE PLACED INTO THE PIT UNTIL IT CAN BE FULLY
OPERATED.
Introduction
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Mechanical Installation