Before installation, read the following instructions carefully. Each Liberty pump is individually factory tested to ensure proper
performance. Closely following these instructions will eliminate potential operating problems, assuring years of trouble-free service.
Risk of electric shock.
Note: Make sure the electrical specifications of the control selected properly match the electrical specifications of the
pump. Always refer to control panel instructions for proper installation. A separate branch circuit is recommended. It must
be sized in accordance with the National electric code for the current shown on the pump nameplate and literature.
Risk of electric shock. Always disconnect the pump from the power source before handling or making adjustments.
The electrical connections and wiring for a pump installation should only be made by qualified personnel.
This pump is supplied with a grounding conductor and grounding-type attachment plug. To reduce the risk of electric
shock, be certain that it is connected only to a properly grounded, grounding-type receptacle.
DO NOT bypass grounding wires or remove ground prong from attachment plugs.
DO NOT use an extension cord.
This pump requires a separate, properly fused and grounded branch circuit. Make sure the power source is properly
sized for the voltage and amperage requirements of the pump, as noted on the nameplate.
The electrical outlet shall be within the length limitations of the pump power cord, and at least 4 feet above floor level
to minimize possible hazards from flood conditions.
The installation must be in accordance with the National Electric Code, Uniform Plumbing Code, International
Plumbing Code, as well as all applicable local codes and ordinances.
Sump and sewage pumps often handle materials which could cause illness or disease. Wear adequate protective
clothing when working on a used pump or piping.
Never enter a pump basin after it has been used. Sewage and effluent can emit several gases which are poisonous.
Keep clear of suction and discharge openings. To prevent injury, never insert fingers into pump while it is plugged in.
DO NOT use this product for flammable or corrosive liquid.
DO NOT use this product in applications where human contact with the pumped fluid is common (such as swimming
pools, fountains, etc.)
NEVER dispose of materials such as paint thinner or other chemicals down drains, as they can chemically attack and
damage pump components, potentially causing product malfunction or failure.
DO NOT use pumps in water over 140F (60C).
DO review applicable codes concerning maximum allowable temperature of water discharged into drain systems.
DO NOT use pumps in mud, sand, cement, oil or chemicals.
DO NOT modify the pump in any way.
DO NOT lift or carry pump by power cord.
DO NOT remove any tags from pump or cords.
If pump is installed during construction before power is available, it must be protected from the environment to prevent
water from entering through the cord plug end, etc.
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.