Liberty Pumps XLGV02, XLGH02 Series Single/Two Stage 2.5 hp Submersible Grinder Pumps Installation Guide

Liberty Pumps XLGV02, XLGH02 Series Single/Two Stage 2.5 hp Submersible

Grinder Pumps

Product Information

Specifications:

• Model: 5596000C
• Frequency: 60 Hz
• XLGV02-Series : Single Stage
• XLGH02-Series : Two Stage
• Approved for Hazardous Locations: Class 1, Division 1, Groups C and D T4, Class 1, Zone 1, Groups IIA and IIB T4
• Submersible Grinder Pumps: 2.5 hp

Product Usage Instructions

Safety Guidelines:
This product comes with safety alert symbols to indicate potential risks. Always read and follow all safety instructions provided in the manual and on the pump to prevent serious injury or death.

Safety Precautions:

• Risk of Electric Shock : Always disconnect the pump from the power source before handling it. All installation and maintenance should be done by qualified personnel.
• Grounding: Ensure proper grounding of the pump using the supplied grounding conductor to prevent energizing of metal portions.
• Personal Protective Equipment (PPE ): Wear appropriate PPE when working on the pump system, especially when water is present.

Installation:

1. For pressure sewer applications, ensure a Redundant Check Valve Assembly is installed between the pump discharge and the street main to protect from system pressures.
2. Keep the installation manual with the owner or system operator/maintainer for reference.
3. Record important information such as model, serial number, control panel details, manufacturing date, installation date, dealer information, and contact number.

Contact Information

• 7000 Apple Tree Avenue, Bergen, NY 14416
• Phone: 1-800-543-2550
• Fax: 1-585-494-1839
• Website: www.LibertyPumps.com/LEP

Frequently Asked Questions (FAQ)

• What should I do if I encounter a safety alert symbol on the pump?
  If you see a safety alert symbol on the pump, refer to the manual for instructions on how to minimize the associated risk.

• How do I ensure proper grounding of the pump system?
  The pump should be properly grounded using the supplied grounding conductor. Do not bypass grounding wires or remove the ground prong from attachment plugs.

Safety Guidelines

• This safety alert symbol is used in the manual and on the pump to alert of potential risk for serious injury or death.
• This safety alert symbol identifies risk of electric shock. It is accompanied with an instruction intended to minimize potential risk of electric shock.
• This safety alert symbol identifies risk of fire. It is accompanied with an instruction intended to minimize potential risk of fire.
• This safety alert symbol identifies risk of serious injury or death. It is accompanied with an instruction intended to minimize potential risk of injury or death.
• Warns of hazards which if not avoided will result in serious injury or death.
• Warns of hazards which if not avoided could result in serious injury or death.
• Warns of hazards which if not avoided could result in minor or moderate injury.
• Signals an important instruction related to the pump. Failure to follow these instructions could result in pump failure or property damage.
• Read every supplied manual before using pump system. Follow all the safety instructions in manual(s) and on the pump. Failure to do so could result in serious injury or death.

Safety Precautions

WARNING RISK OF ELECTRIC SHOCK

• Accidental contact with electrically live parts, items, fluid, or water can cause serious injury or death.
• Always disconnect pump(s) from power source(s) before handling or making any adjustments to either the pump(s), the pump system, or the control panel.
• All installation and maintenance of pumps, controls, protection devices, and general wiring shall be done by qualified personnel.
• All electrical and safety practices shall be in accordance with the National Electrical Code®, the Occupational Safety and Health Administration, or applicable local codes and ordinances.
• Do not remove cord and strain relief, and do not connect conduit to pump.
• Pump shall be properly grounded using its supplied grounding conductor. Do not bypass grounding wires or remove ground prong from attachment plugs. Failure to properly ground the pump system can cause all metal portions of the pump and its surroundings to become energized.
• Do not handle or unplug the pump with wet hands, when standing on damp surface, or in water unless wearing Personal Protective Equipment.
• Always wear dielectric rubber boots and other applicable Personal Protective Equipment (PPE) when water is on the floor and an energized pump system must be serviced, as  submerged electrical connections can energize the water. Do not enter the water if the water level is higher than the PPE protection or if the PPE is not watertight.
• Do not lift or carry a pump or a float assembly by its power cord. This will damage the power cord, and could expose the electrically live wires inside the power cord.
• The electrical power supply shall be located within the length limitations of the pump power cord, and for below grade installations it shall be at least 4 ft (1.22 m) above floor level.
• Do not use this product in applications where human contact with the pumped fluid is common (such as swimming pools, fountains, marine areas, etc.).
• Protect the power and control cords from the environment. Unprotected power and control (switch) cords can allow water to wick through ends into pump or switch housings, causing surroundings to become energized.
• Single-phase 200/230V pumps shall only be operated without the float switch by using the circuit breaker or panel disconnect.

WARNING RISK OF FIRE

• This product requires a separate, properly fused and grounded branch circuit, sized for the voltage and amperage requirements of the pump, as noted on the nameplate.  Overloaded branch circuit wires will get very hot and can catch on fire. When used, electrical outlets shall be simplex of the appropriate rating.
• Do not use an extension cord to power the product. Extension cords can overload both the product and extension cord supply wires. Overloaded wires will get very hot and can catch on fire.
• Do not use this product with or near flammable or explosive fluids such as gasoline, fuel oil, kerosene, etc. If rotating elements inside pump strike any foreign object, sparks may occur. Sparks could ignite flammable liquids.
• Sewage and effluent systems produce and may contain flammable and explosive gases. Prevent introduction of foreign objects into basin as sparks could ignite these gases. Exercise caution using tools and do not use electronic devices or have live, exposed electrical circuits in or around basins, open covers and vents.

WARNING RISK OF SERIOUS INJURY OR DEATH

• Hazardous locations contain explosive gases that can be detonated by sparking or electric shock.
• All terminations and penetrations of conduit or cable shall be done using approved materials and methods intended for use to mitigate the potential for explosion.
• When working in a hazardous location, all precautions to minimize ignition sources such as spark and flame should be taken to limit the potential for fire or explosion.
• Use only non-sparking tools and components in and around basins, open covers and vents. Do not use electronic devices that are not rated for use in hazardous locations or have live, exposed electrical circuits in or around basins, open covers and vents. Sewage and effluent systems produce and may contain flammable and explosive gases and sparks could ignite these gases.
• All electrical and motor repairs and service must be performed by a repair facility approved by Liberty Pumps and certified to work on explosion-proof motor enclosures.
• Do not remove power supply or control cord. All electrical and motor repairs and service must be performed by the factory or a repair facility approved by Liberty Pumps and certified to work on explosion-proof motor enclosures.
• Refer to Chapter 5 of the National Electric Code® or applicable local codes and ordinances for all electrical and wiring requirements in hazardous locations.
• Float switches must be connected to an intrinsically safe circuit in the control panel as per the requirements of Chapter 5 of the National Electric Code®.
• All installations shall be in compliance with all applicable Federal, State, and Local codes and ordinances for hazardous locations.
• All electrical terminations shall be made according to Federal, State, and Local codes for hazardous or classified locations.
• Energizing the control panel or breaker for the first time is potentially dangerous. Licensed electrical personnel should be present when the panel or breaker is energized for the first time. If faults caused by damage or poor installation practices have not been detected, serious damage, injury or death can result when power is applied.
• Do not enter a pump basin after it has been used. Sewage and effluent can emit several gases that are poisonous.
• Conduit, junction boxes, and associated components shall be approved for use with hazardous locations and installed according to specifications.
• Do not modify the pump/pump system in any way. Modifications may affect seals, change the electrical loading of the pump, or damage the pump and its components.
• All pump/pump system installations shall be in compliance with all applicable Federal, State, and Local codes and ordinances.
• Do not allow children to play with the pump system.
• Do not allow any person who is unqualified to have contact with this pump system. Any person who is unaware of the dangers of this pump system, or has not read this manual, can easily be injured by the pump system.
• In 200/230V installations, one side of the line going to the pump is always “hot”, whether the float switch is on or off. To avoid hazards, install a double pole disconnect near the pump installation.
• Vent basin in accordance with local code. Proper venting of sewer and effluent gases alleviates poisonous gas buildup and reduces the risk of explosion and fire from these flammable gases.
• Wear adequate Personal Protective Equipment when working on pumps or piping that have been exposed to wastewater. Sump and sewage pumps often handle materials that can transmit illness or disease upon contact with skin and other tissues.
• Do not remove any tags or labels from the pump or its cord.
• Keep clear of suction and discharge openings. To prevent injury, never insert fingers into pump while it is connected to a power source.
• This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. www.p65warnings.ca.gov.
• A 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.
• Wear Personal Protective Equipment to protect hands as cutter blades have extremely sharp edges and present a serious cutting hazard.

caution
This pump has been evaluated for use with water only, however use with human waste and toilet paper is permitted.

notice

• 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.
• Do not use pump system with mud, sand, cement, hydrocarbons, grease, or chemicals. Pump and system components can be damaged from these items causing  product malfunction or failure. Additionally, flooding can occur if these items jam the impeller or piping.
• Verify 3-phase pumps for correct rotation prior to installing pump(s) in basin. To change rotation, reverse any two of the three power leads to the pump (not the ground). Code the wires for reconnection after installation.
• Do not dispose of materials such as paint thinner or other chemicals down drains. Doing so could chemically attack and damage pump system components and cause product malfunction or failure.
• Do not use pumps with fluid over 104°F (40°C). Operating the pump in fluid above this temperature can overheat the pump, resulting in pump failure and excessive cavitation.
• Submersible Pump—do not run dry.
• The Uniform Plumbing Code® states that sewage systems shall have an audio and visual alarm that signals a malfunction of the system, to reduce the potential for property damage.
• Keep pump upright.
• Do not allow pump to freeze.
• At no time shall the pump be stored within an incomplete wet pit. The pump shall not be placed into the pit until it can be fully operational.

General Information

• This manual contains important information for the safe installation and use of this product. Make sure this manual is provided to the owner of the equipment or to the responsible party who maintains the system.
• XLGH02/XLGV02-Series grinder pumps are to be used for handling septic tank effluent, sewage, and drain (storm) water.
• Complete the Start-Up Report as installation progresses.
• Completed and submitted Report is required for warranty.
• Retain Report for reference. www.LibertyPumps.com/LEP/ Warranty
• Pumps are certified by CSA Group to CSA, UL, and FM standards for use in hazardous locations with division classification of Class 1, Division 1 Group C and D; or as zone classified Class 1, Zone 1, and Group IIA and IIB. Do not use in other hazardous locations.
• Pumps must be serviced at a qualified hazardous motor enclosure repair facility approved by Liberty Pumps. Any unauthorized field repairs void warranty and hazardous location ratings. Contact Liberty Pumps at 1-800-543-2550 to locate the closest authorized service center.

Operating Constraints
It is extremely important to verify that the pump has been sized correctly for the intended installation. The operating point of the pump must lie within the acceptable range as outlined by the applicable Liberty Pumps performance chart. Operating the pump outside of the recommended range can invalidate the CSA Certification of the pump and can also  cause damage and premature failure. Operating outside of  the recommended range can cause the pump to exceed its  rated nameplate amp draw, which will void the pump certification. It can also cause motor overheating, cavitation, excessive vibration, clogging, and poor energy efficiency.

Inspection and Storage

Initial Inspection
The pump should be immediately inspected for damage that may have occurred in shipment.

1. Visually check the pump and any spare parts for damage.
2. Check for damaged electrical wires, especially where they exit the motor housing.
   Contact Liberty Pumps customer service to report any damage or shortage of parts.

Storage Before Use
Warning
Protect the power and control cords from the environment. Unprotected power and control (switch) cords can allow water to wick through ends into pump or switch housings, causing surroundings to become energized.

caution
At no time shall the pump be stored within an incomplete wet pit. The pump shall not be placed into the pit until it can be fully operational.
Liberty Engineered Products are shipped from the factory ready for installation and use. The pump shall 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 environment where the pump and its container shall be covered to protect it from water, dirt, vibration, etc. The cord ends must be protected against moisture. Do not allow the pump to freeze. Uninstalled pumps that are idle for periods of time greater than three months should have impellers and cutters manually rotated once a month to lubricate the seals.

Model Specifications

For complete listing of models and their specifications, refer to www.LibertyPumps.com/lep/About/Engineering-Specs. Pump nameplate provides a record of specific pump information.

Pump System Components

Power and Control Cords
Warning RISK OF ELECTRIC SHOCK

• Do not remove cord and strain relief, and do not connect conduit to pump.
• Each cord has a green lead. This is the ground wire and must be grounded properly per NEC® and/or local codes.
  The power and control cords are permanently potted into the cord cap. The cords shall not be spliced.

Thermostats

• The XLGH02/XLGV02-Series grinder pumps are protected from overheating by means of thermal switches (thermostats) located in the motors. For 1-phase models, a hermetically sealed thermostat is mounted on the motor windings and wired directly in series with the motor winding, interrupting power in an overheat condition. 3-phase models utilize two thermostats mounted in series directly on the motor windings. The thermostat circuit must be connected to a control panel that will interrupt power to the pump in a high temperature condition.
• Both 1- and 3-phase pumps are constructed with class F materials, with a maximum operation temperature of 155°C. Failure to use the proper circuitry and connection of the thermostat will drop temperature class from T4 to T3 on 3-phase units.
• Many panels have a manual reset button for the thermostats on 3-phase units; this button must be pressed to reset the system after the pump has cooled. 1-phase units automatically reset after the pump has cooled.

Overload Protection
3-phase XLGH02/XLGV02-Series grinder pumps require overload protection in the control panel. The motor control unit shall be approved and shall be properly sized or adjusted for the full load input power indicated on the pump nameplate. It is important to properly adjust or select the motor control overload protection. The full load amperes on the nameplate should be used as a baseline, but it is important to consider that events such as supply voltage variation or large solids passing through the pump can temporarily increase current draw. To avoid possible nuisance tripping, it may be necessary to adjust overloads to a value slightly higher than the full load input power indicated on the pump nameplate.

Control Panel
Warning
Float switches must be connected to an intrinsically safe circuit in the control panel as per the requirements of Chapter 5 of the National Electric Code®.

• All XLGH02/XLGV02-Series grinder pumps require a separate, approved pump control panel for operation. Operation of these models will be according to the control selected; see separate operation instructions supplied with the unit.
• IMPORTANT: When connecting an LEP-Series pump to an existing control panel, verify the panel is correctly sized and equipped for the pump.
• Control and power cords shall not be spliced, although a junction box may be used. Verify the electrical specifications for the control panel properly match those of the pump. 3-phase models require overload elements selected or adjusted in accordance with the control panel instructions.
• The panel for 3-phase models must have provisions for the thermostats that open the motor contactors. Do not exceed voltage/current combinations for the thermostat: 16 VDC/20 VA,
• 115 VAC/22 Amps, 277 VAC/8 Amps, and 600 VAC/4 Amps. All models have a temperature (T) class rating of T4 (135°C) with thermostats connected.
• The control panel must be installed outside the hazardous area and appropriately isolated and sealed to prevent any potential ignition or explosion. Control and power cords cannot be spliced; a junction box may be used providing it is rated for hazardous locations and has approved cord connectors. Only approved controls that have intrinsically safe float switch connections shall be used. Failure to use the proper circuitry and to connect the thermostat will void the T4 temperature class of the pump and will drop the temperature class to T3 (200°C).
• 1-phase pumps require a motor start circuit (start capacitor, run capacitor, start relay). Refer to Table 1 for the control panel component kit.
  Component and Specification| Liberty Pumps P/N
  ---|---
  200V 1-phase Start Kit

(contains 3 items listed separately below)

| K001640
Start Capacitor, 270–324 µF 220/250 VAC
Run Capacitor, 65 µF 370 VAC
Start Relay, Mars 551
230V 1-phase Start Kit

(contains 3 items listed separately below)

| K001641
Start Capacitor, 270–324 µF 220/250 VAC
Run Capacitor, 50 µF 370 VAC
Start Relay, Mars 551

Seal Failure Probes

• The XLGH02/XLGV02-Series grinder pumps have a leak detection device mounted in an oil-filled cavity located between the two mechanical shaft seals. The circuit can be tested by checking for continuity between the seal leak wires, see the applicable wiring diagram (Figure /Figure ). If the lower shaft seal begins to leak and water migrates into the cavity, it will be detected. Once a shaft seal failure is detected, the pump will continue to operate but service should be scheduled as soon as possible.
• The LEP-Series control panels by Liberty Pumps have a seal leak detection system with a test button that monitors the integrity of the seal leak circuit and components. When pressed, the light should illuminate. The light should go off when the test button is released. If it remains on, the potentiometer is set too high. If light does not illuminate, the light is burned out, the circuity is open, or the system does not have power. The seal leak relay requires adjustment upon installation. See Seal leak relay setup on page 7. Seal fail probes connect to a relay in the control panel, which is included in a Liberty Pumps control panel. For a non-Liberty Pumps control panel or for replacement, refer to Table 2.
  Description| Relay Input Voltage| Liberty Pumps P/N| Macromatic P/N
  ---|---|---|---
  Simplex, controls 1 pump| 120V| K001672| SFP120A250
  Duplex, controls 2 pumps| 120V| K001675| SFP120C250

Wiring Instructions

WARNING

• Always disconnect pump(s) from power source(s) before handling or making any adjustments to either the pump(s), the pump system, or the control panel.
• All installation and maintenance of pumps, controls, protection devices, and general wiring shall be done by qualified personnel.
• All electrical and safety practices shall be in accordance with the National Electrical Code®, the Occupational Safety and Health Administration, or applicable local codes and ordinances.

1-Phase Wiring

3-Phase Wiring

MOTOR WIRING CONNECTIONS

Preparation

WARNING RISK OF ELECTRIC SHOCK
Always disconnect pump(s) from power source(s) before handling or making any adjustments to either the pump(s), the pump system, or the control panel.

Prepare Basin
If replacing a previously installed pump, prepare the basin by removing the old pump and cleaning any debris from the sump. Inspect all remaining equipment in the basin including guide rails, piping, valves, and electrical junction boxes (if present) and repair or replace as appropriate. Ensure that control hardware such as floats or pressure transducers are clean, properly adjusted, and in good working order.

Install Pump Control and Alarm Floats

• The water level in the sump is determined by the placement of the control floats and should be positioned such that the motor housing is completely submerged to properly cool the motor. If full submersion is not possible, the minimum water depth shall be no less than 13” as measured from the bottom of the pump legs. The upper water level should be positioned to minimize pump starts. The alarm float should be above the turn-on float switch but below any inlets.
• Set the second (turn-on) control above the lower turn-off control. The exact distance between the two floats must be a compromise between a frequent pumping cycle (10 starts per hour max) to  properly manage sewage level, and a longer pump run duration per start, which maximizes energy efficiency. This distance shall be determined by the engineer, depending on the conditions of the application.

Cutter and Impeller Free Movement Check
WARNING RISK OF SERIOUS INJURY OR DEATH
Wear Personal Protective Equipment to protect hands as cutter blades have extremely sharp edges and present a serious cutting hazard.

• Do not connect any power to pump until this check is complete. Manually rotate the cutter to check that it spins freely with very little resistance. The cutter is located on the bottom of the pump. The cutter can be carefully rotated by hand, or rotated by inserting a tool into the cutter bolt. If rotating by hand, be sure to wear protective gloves as the cutter and cutter plate have sharp edges.
• The pump can remain upright or can be laid down on its side for easier access to the cutter. Besides verification that the cutter and impeller are freely spinning, rotating the cutter helps to lubricate the shaft seals if the pump has been non-operational for more than a week. It is recommended to rotate the cutter 5–10 full rotations.

Installation

WARNIMG

• All installation and maintenance of pumps, controls, protection devices, and general wiring shall be done by qualified personnel.
• All electrical and safety practices shall be in accordance with the National Electrical Code®, the Occupational Safety and Health Administration, or applicable local codes and ordinances.

NOTE
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.

Electrical Connections
With mains power disconnected, complete pump and control wiring connections per wiring diagrams included with the control panel and in Wiring Instructions. Verify connections. Check all wires for unintentional grounds after the connections are made.

3-Phase Pump Rotation Verification
Verify 3-phase pumps for correct rotation prior to installing pump(s) in basin. To change rotation, reverse any two of the three power leads to the pump (not the ground). Code the wires for reconnection after installation.

• 3-phase power uses three separate alternating currents that peak at different integrals. With pumps that are powered by 3-phase electric, the phase sequence of the motor must match the phase sequence of the power source. When the phase sequences match, the pump operates properly. However, when the phases are out of order, the pump runs backwards (i.e., the impeller rotates in the wrong direction). This causes an extreme loss of performance and could raise the current draw, which  could result in tripping an overload or circuit breaker. To ensure that the power to the pump is installed correctly, always verify proper rotation before lowering it into the sump. If the pump is rotating in the wrong direction, turn off the power and reverse any two leads. This reverses the phase sequence and corrects the pump rotation.
• For 3-phase pumps, rotation must be clockwise when looking from the top of the pump. The correct direction is also stamped on the bottom of the volute.

Thermostat and Seal Failure Connections

• Verify thermostat wires are connected in series with the contactor and that seal fail probes are properly connected and relay sensitivity properly adjusted. Connections are provided on the terminal strip inside the Liberty Pumps control panel.
• Seal leak relay setup: The seal leak relay adjustment dial should be set to 75; for best results turn the dial until the light turns on around 125 then turn it back to 75.

Guide Rail Systems
WARNING
When working in a hazardous location, all precautions to minimize ignition sources such as spark and flame should be taken to limit the potential for fire or explosion.
If guide rails are used, refer to the separate installations supplied with the unit for proper operation. Use of a guide rail system shall be of a non- sparking design. Contact Liberty Pumps for available models.

Discharge Line
Make all discharge connections. A check valve is required to prevent the backflow of liquid after each pumping cycle. A gate valve should follow the check valve to allow periodic cleaning of the check valve or removal of the pump. The remainder of the discharge line should be as short as possible with a minimum number of turns to minimize friction head loss. Do not reduce the discharge to below the pump outlet size. Larger pipe sizes may be required to eliminate friction head loss over long runs. Contact Liberty Pumps or other qualified person if questions arise regarding proper pipe size and flow rates.

Pressure Sewer Applications
A redundant check valve assembly consisting of a curb stop and check valve must be installed between the pump discharge and the street main, as close to the public right-of-way as possible, on all  pressure (force main) sewer installations to protect from system pressures. The curb stop valve is necessary to isolate the site from the pressure sewer while the check valve provides redundant protection against potentially detrimental backflow. All valves and fittings should be rated for at least 200 PSI service. See Liberty Pumps line of CSV-Series Curb Stop/Swing Check Valve Assemblies and CK-Series Connection Kit.

Vent
The fiberglass basin provided with the system must be completely sealed and properly vented per local health and plumbing code requirements. If the system is to be vented through the inlet to an existing building vent stack, there must be no traps between the system inlet and the nearest building vent stack connection (option 1). If this is not possible or desirable per the application, a standalone vent can be installed in tank side (option 2) or a vent  flange or grommet can be installed in a hole cut into the cover (option 3).

Operation

WARNING
Energizing the control panel or breaker for the first time is potentially dangerous. Licensed electrical personnel should be present when the panel or breaker is energized for the first time. If faults caused by damage or poor installation practices have not been detected, serious damage, injury or death can result when power is applied.

Starting System

1. Double check all wire connections.
2. Turn pump(s) to OFF position on H-O-A switch.
3. Turn on breakers.
4. Test each pump separately in Hand mode and observe operation. If 3-phase pump is noisy or vibrates, rotation is wrong. Refer to 3-Phase Pump Rotation Verification.
5. Set H-O-A switch(es) to AUTO position and allow water to rise in basin until one pump starts. Allow pump to operate until the level drops to turn-off point.
6. Allow basin level to rise to start other pump(s). Notice run lights in panel. Pumps should alternate on each successive cycle of operation.
7. Turn H-O-A switch(es) to OFF position and allow basin to fill to the override (alarm) control level(s).
8. Observe all floats in operation to verify that there is adequate clearance to the surrounds to ensure that the floats do not have the opportunity to get hung up in their travel.
9. Verify alarm system response.
10. Turn switch(es) to AUTO position; pumps should start and operate together until level drops to turn-off point.
11. Repeat this operation and cycle several times before leaving the site.
12. Check voltage when pumps are operating and record the amp draw of each pump. Check amps on each wire as sometimes a high leg will exist. For excessive voltage on one leg, the electric utility company shall be consulted.
13. Complete Startup Report. Be certain to complete adequate testing, especially on systems with multiple pumps or custom control configurations.

Maintenance and Troubleshooting

WARNING RISK OF ELECTRIC SHOCK

• Accidental contact with electrically live parts, items, fluid, or water can cause serious injury or death.
• Always disconnect pump(s) from power source(s) before handling or making any adjustments to either the pump(s), the pump system, or the control panel.

WARNING RISK OF SERIOUS INJURY OR DEATH

• All electrical and motor repairs and service must be performed by a repair facility approved by Liberty Pumps and certified to work on explosion-proof motor enclosures.
• Use only non-sparking tools and components in and around basins, open covers and vents. Do not use electronic devices that are not rated for use in hazardous locations or have live, exposed electrical circuits in or around basins, open covers and vents. Sewage and effluent systems produce and may contain flammable and explosive gases and sparks could ignite these gases.
• Do not enter a pump basin after it has been used. Sewage and effluent can emit several gases that are poisonous.
• Wear adequate Personal Protective Equipment when working on pumps or piping that have been exposed to wastewater. Sump and sewage pumps often handle materials that can transmit illness or disease upon contact with skin and other tissues.

NOTE
Verify correct 3-phase pump rotation before returning to service.

Maintenance

As the motor is oil-filled, no lubrication or other maintenance is required.
To keep the pump/pump system operating smoothly, perform the following routine checks. Severe operating environments will require more frequent checks. For any issues that are not resolvable, contact Liberty Pumps for further assistance.

Monthly

1. Pumps that are idle for more than a month in a dry basin should have impellers manually operated through the breaker panel monthly to lubricate the seals. Limit the lubrication run time to less than one minute per pump.
2. Pumps that are idle in a wet basin must be removed—do not store pump in wet basin.

Quarterly

1. Check pumps for corrosion and wear.
2. Check for free and unobstructed float switch operation and float switch condition.
3. Inspect for proper check valve operation.
4. For multiple pumps, check for balanced operating times. Uneven times indicate a defective unit, float switch or control.
5. Inspect the control panel for any presence of moisture in enclosure, loose connections, and general component condition.

Annually
Basin should be inspected and cleaned. Replace any defective components.

Service
The only allowable repairs/replacements without compromisingthe hazardous location rating of the pump are: lower shaft seals, volute, and impeller components.
Otherwise, the pump must be returned to Liberty Pumps or an authorized repair facility for electrical and motor service. This will ensure the integrity of the hazardous location rating of the pump and comply with Liberty Pumps warranty requirements. No repair work shall be carried out during the warranty period without prior factory approval. To do so may void the warranty. Liberty Pumps, Inc. assumes no responsibility for damage or injury due to disassembly in the field. Disassembly, other than an authorized motor enclosure repair facility approved by Liberty Pumps or its authorized service centers, automatically voids warranty.

Troubleshooting
Refer to Table 3 for troubleshooting guidance.

Pump operates with selector switch in Hand position but does not operate in Auto position.| __

Control circuits malfunctioning.

| Check float switch, level control or alternator relay for issues. Replace as necessary.
Check control panel.
__

__

__

__

__

__

__

Pump does not start.

| Control panel selector switch in Off position.| Set selector switch to Hand or Auto position.
---|---|---
Blown control circuit transformer fuse.| Replace fuse.
Tripped circuit breaker, blown fuse, or other interruption of power.| Reset tripped circuit breaker; replace blown fuse

with properly sized fuse; investigate power interruption.

Improper voltage.| Have an electrician check all wiring for proper

connections and adequate voltage and capacity.

Float switch is unable to move to the pump ON

position due to interference in basin or other obstruction.

| Position the pump or float switch so that it has adequate clearance for free movement.
Insufficient liquid level.| Verify the liquid level is allowed to rise enough to

activate float switch(es).

Defective float switch.| Replace float switch.
Obstructed impeller or volute.| Remove obstruction.
Loose wiring connections.| Check and tighten all connections.
3-phase motor winding failure or mis-wired

motor.

| Check resistance of motor windings. All three

phases should have the same reading.

Thermal overload tripped.| Wait for pump to cool to operating temperature.
__

__

__

__

__

Pump does not deliver proper capacity.

| Discharge gate valve partially closed or clogged.| Check the discharge line for foreign material,

including ice if the discharge line passes through or into cold areas.

Check valve partially clogged.| Raise liquid level up and down to clear; remove

check valve to remove obstruction.

__

Incorrect motor rotation.

| 1-phase: verify capacitor wiring in Wiring

Instructions , else consult factory.

3-phase: correct pump rotation direction. Refer to section 3-Phase Pump Rotation Verification.

Low liquid level.| Check liquid level.
Obstruction in pump or piping.| Remove obstruction.
Total head is beyond pump’s capability.| Route discharge piping to a lower level. If not

possible, a larger pump may be required. Consult Liberty Pumps.

__

__

__

__

Pump runs but does not turn off.

| Pump is air-locked.| Turn pump off and let set for several minutes,

then restart.

Float switch unable to move to the pump OFF

position due to interference with the side of basin or other obstacle.

| Position the pump or float switch so that it has adequate clearance for free movement.
Control panel selector switch in Hand position.| Set selector switch to Auto position.
Control panel failure.| Check control panel.
Defective float switch.| Replace float switch.
Missing or faulty curb stop/swing check valve

allowing system pressure to feed back through discharge piping.

| Verify presence of a curb stop check valve or replace curb stop/swing check valve assembly.
Seal fail light is illuminated.| Lower (outer) seal has been compromised.| Replace lower seal.
Control panel relay sensitivity is incorrect.| Adjust sensitivity dial.
__

Pump does not start and overload heaters trip.

| Unintentional ground.| Turn off power and check motor leads for possible ground.
---|---|---
3-phase motor winding failure or mis-wired

motor.

| Check resistance of motor windings. All three

phases should have the same reading.

Obstructed impeller or volute.| Remove obstruction.
Motor stops and then restarts after short period but overload heaters in starter do not trip.| Pump may be operating on a short cycle due to

basin being too small.

| A larger basin may be required. Consult Liberty

Pumps.

Water returning to basin due to leaking check

valve.

| Replace check valve.
__

__

Pump cycles too frequently.

| Improper float switch setting.| Adjust float switch setting.
Check valve not installed, stuck open, or leaking.| Install check valve(s); remove check valve and

examine for freedom of operation and proper installation.

Missing or faulty curb stop/swing check valve

allowing system pressure to feed back through discharge piping.

| Verify presence of a curb stop check valve or replace curb stop/swing check valve assembly.
__

__

__

__

__

Repeated tripping.

| Circuit protection underrated.| Check rating and replace with proper size.
Current unbalance.| Check current draw.
Other appliance on same circuit.| Pump requires separate circuit.
Pump is connected to an extension cord or

wiring is inadequate or compromised.

| Have an electrician check for proper wiring.
Improper voltage.| Have an electrician check all wiring for proper

connections and adequate voltage and capacity.

Obstruction in pump.| Remove obstruction.
__

Incorrect motor rotation.

| 1-phase: verify capacitor wiring in Wiring

Instructions , else consult factory.

3-phase: correct pump rotation direction. Refer to section 3-Phase Pump Rotation Verification.

Foreign matter build-up.| Clean motor housing.
__

__

__

__

Pump operates noisily.

| Piping attachments to building are too rigid.| Replace a portion of the discharge line with

rubber hose or connector.

__

Incorrect motor rotation.

| 1-phase: verify capacitor wiring in Wiring

Instructions , else consult factory.

3-phase: correct pump rotation direction. Refer to section 3-Phase Pump Rotation Verification.

Pump is being run below minimum head

requirement causing cavitation.

| A different sized pump or impeller may be

required. Consult Liberty Pumps.

Foreign objects in the impeller cavity.| Clean the impeller cavity.
Broken impeller.| Consult Liberty Pumps for information regarding

impeller replacement.

Worn bearings.| Return pump to an authorized repair facility.
High level alarm triggering.| Missing or faulty curb stop/swing check valve

allowing system pressure to feed back through discharge piping.

| Verify presence of a curb stop check valve or replace curb stop/swing check valve assembly.
Rupture or failure of discharge

plumbing either inside or outside of the basin.

| Missing or faulty curb stop/swing check valve

allowing system pressure to feed back through discharge piping.

| Verify presence of a curb stop check valve or replace curb stop/swing check valve assembly.
__

Pump runs periodically when fixtures are not in use.

| Check valve not installed, stuck open, or leaking.| Install check valve(s); remove check valve and examine for freedom of operation and proper installation.
---|---|---
Fixtures are leaking.| Repair fixtures as required to eliminate leakage.
__

__

__

__

__

__

Pump runs or hums but does not pump.

| Discharge line blocked or restricted.| Check the discharge line for foreign material,

including ice if the discharge line passes through or into cold areas.

Check valve is stuck closed or installed backward.| Remove check valve(s) and examine for freedom

of operation and proper installation.

Gate or ball valve is closed.| Open gate or ball valve.
Total head is beyond pump’s capability.| Route piping to a lower level. If not possible, a

larger pump may be required. Consult Liberty Pumps.

Obstructed impeller or volute.| Remove obstruction.
__

Pump is air-locked.

| Turn pump off and let set for several minutes,

then restart.

Add baffle to reduce trapped air bubbles.
Capacitor failure in control panel.| Check capacitors and replace if needed.
Stuck/defective motor contactor in control

panel.

| Replace motor contactor.
Pump is not seated correctly in guide rail base.| Lift pump and re-position.

Warranty

Liberty Engineered Products Limited Warranty

• Liberty Pumps, Inc. warrants that pumps of its Engineered Product line are free from all factory defects in material and workmanship for a period of 18 months from the date of installation or 24 months from the date of manufacture, whichever occurs first, and provided that such products are used in compliance with their intended applications as set forth in the Liberty Engineered Products specifications and technical manuals. The date of installation shall be determined by a completed pump start-up report and warranty registration form. A pump startup report, filled out by a qualified installer, is required for warranty to take effect. The report must be submitted within 30 days from the installation date and submitted through the Liberty Pumps website. During the warranty period, the manufacturer’s obligation, and at its discretion, shall be limited to the repair or replacement of any parts found by the manufacturer to be defective, provided the product is returned freight prepaid to the manufacturer or its authorized service center, and provided that none of the following warranty-voiding characteristics are evident:
• The manufacturer shall not be liable under this Warranty if the product has not been properly installed or maintained in accordance with the printed instructions provided; if it has been disassembled, modified, abused or tampered with; if the pump discharge has been reduced in size; if the pump has been used in water temperatures above those shown in the specifications; if the thermal overload(s) and seal moisture probe(s) have not been properly connected (where equipped); if the pump has been used in water containing sand, lime, cement, gravel or other abrasives; if the product has been used to pump chemicals or hydrocarbons; if the product has been moved from its original installation location, or if the label bearing the serial and code number has been removed.
• Liberty Pumps, Inc. shall not be liable for any loss, damage or expenses resulting from installation or use of its products, or for consequential damages, including field labor costs, travel expenses, rental equipment, costs of removal, reinstallation or transportation to and from the factory or an authorized Liberty Pumps repair facility.
• There is no other express warranty. All implied warranties, including those of merchantability and fitness for a particular purpose, are limited to 18 months from the date of installation or 24 months from the manufacturing date. This Warranty contains the exclusive remedy of the purchaser, and, where permitted, liability for consequential or incidental damages under any and all warranties are excluded.  https://www.libertypumps.com/lep/dom/Services/Warranty-Startup-Form

References

• Liberty Engineered Products - Domestic
• Liberty Engineered Products - Domestic
• Liberty Engineered Products - Domestic
• p65warnings.ca.gov

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