Liberty Pumps LGV03-LGH03-Series Submersible Grinder Pumps Instruction Manual

Liberty Pumps LGV03-LGH03-Series Submersible Grinder Pumps

Product Information

• Model: 7550000K
• Frequency: 60 Hz
• Series: LGV-Series, LGH-Series
• Location: Ordinary and Hazardous Locations (Class 1, Division 1, Groups C and D T4, Class 1, Zone 1, Groups IIA and IIB T4)

Product Usage Instructions

Installation Guidelines

• For pressure sewer applications, ensure a Redundant Check Valve Assembly is installed between the pump discharge and the street main. The assembly should be placed as close to the public right-of-way as possible to protect it from system pressures.
• The installer must ensure the manual remains with the owner or system operator/maintainer.

Safety Guidelines

• Risk of Electric Shock: Always disconnect the pump from the power source before handling or making adjustments. Accidental contact with live parts can be fatal.
• Grounding: Properly ground the pump system using the supplied grounding conductor to prevent the energization of metal parts.
• Personal Protective Equipment: Wear appropriate PPE when servicing energized pump systems in wet conditions.
• Handling and Lifting: Do not handle the pump with wet hands or lift it by the power cord to avoid damage and electrical hazards.

Frequently Asked Questions

Q: What should I do if I encounter a safety alert symbol?

A: Safety alert symbols are used to indicate potential risks. Follow the accompanying instructions to minimize the risk associated with electric shock, fire, or injury.

Q: How should I ground the pump system?

A: Use the provided grounding conductor to ensure proper grounding of the pump system. Bypassing grounding wires can lead to energization of metal parts.

Q: Can I handle the pump with wet hands?

A: It is advised not to handle the pump with wet hands to avoid electric shock. Always wear appropriate Personal Protective Equipment in wet conditions.

Q: What should I do during pump maintenance?

A: Before making any adjustments or handling the pump, ensure it is disconnected from the power source. Only qualified personnel should perform installation and maintenance tasks.

• 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

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.

NOTICE:

Installer:
manual must remain with the owner or system operator/maintainer.

Record information:

• Model:
• Serial:
• Control Panel:
• Mfg Date:
• Install Date:
• Dealer:
• Dealer Ph:

Safety Guidelines

Safety Precautions

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.
• Accidental contact with electrically live parts, items, fluid, or water can cause serious injury or death.
• 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 by the National Electrical Code®, the Occupational Safety and Health Administration, or applicable local codes and ordinances.
• Do not remove the cord and strain relief, and do not connect the conduit to the pump.
• The pump shall be properly grounded using its supplied grounding conductor. Do not bypass grounding wires or remove ground prongs 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 a 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 electrical 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, ions 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

• 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.

• 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 this product with or near flammable or explosive fluids such as gasoline, fuel oil, kerosene, etc. If rotating elements inside the 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 the introduction of foreign objects into the 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.
  Applicable to Non-Hazardous Locations

• Ordinary location pumps are not to be installed in locations classified as hazardous by the National Electric Code®, ANSI/NFPA 70.

WARNING RISK OF SERIOUS INJURY OR DEATH

• 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 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 comply with all applicable Federal, State, and Local codes and ordinances.
• Do not allow children to play with the pump system.
• Do not allow any unqualified person 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 by 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.
• A grinder pump contains metal parts that rotate at high speeds. Be careful around the 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 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 enter a pump basin after it has been used. Sewage and effluent can emit several poisonous gases.
• Keep clear of suction and discharge openings. To prevent injury, never insert fingers into the 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.
• Wear Personal Protective Equipment to protect hands as cutter blades have extremely sharp edges and present a serious cutting hazard.
• Do not remove any tags or labels from the pump or its cord.
• For all ordinary locations and hazardous locations quick-connect cord replacements: the power cord must be of the same length and type as originally installed on the Liberty Pumps product. Use of an incorrect cord may lead to exceeding the electrical rating of the cord and could result in death, serious injury, or other significant failure.

Applicable to Non-Hazardous Locations
Do not use this ordinary location product with flammable, explosive, or corrosive fluids. Do not use in a flammable and/or explosive atmosphere as serious injury or death could result.

Applicable to Hazardous Locations

• All electrical and motor repairs and services must be performed by a repair facility approved by Liberty Pumps and certified to work on explosion-proof motor enclosures.

• Permanent-type power and control cords where the cord cap needs to be removed for replacement are not
  field-replaceable. Service for this type of damaged power or control cords must be performed by the factory or a repair facility approved by Liberty Pumps and certified to work on and recertify explosion-proof motor enclosures.

• 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 sparks 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.

• 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 comply with all applicable Federal, State, and Local codes and ordinances for hazardous locations.

• All personnel shall be trained and qualified for safe work practices and procedures.

• Conduit, junction boxes, and associated components shall be approved for use in hazardous locations and installed according to specifications.

• All electrical terminations shall be made according to Federal, State, and Local codes for hazardous or classified locations.

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.

• Verify 3-phase pumps for correct rotation before installing pump(s) in the 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.

• Do not use a pump system with mud, sand, cement, hydrocarbons, grease, or chemicals. Pump and system components can be damaged by these items causing product malfunction or failure. Additionally, flooding can occur if these items jam the impeller or piping.
  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 the pump upright.
  Do not allow the 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.

• Replacement impellers must match the part number of the original impeller installed from the factory. Do not trim impellers without consulting the factory.

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.
• These LEP-Series pumps are to be used for handling septic tank effluent, sewage, and drain (storm) water.
• Provide pump serial numbers in all correspondence and reports.
• Complete the Start-Up Report as the installation progresses. A completed and submitted Report is required for warranty. Retain Report for reference. https://www.libertypumps.com/lep/dom/Services/Warranty-Startup-Form
• Ordinary location pumps are certified by CSA® Group to CSA and UL® standards.
• Hazardous location 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 it in other hazardous locations.

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.

Model Specifications

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

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 RISK OF ELECTRIC SHOCK
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.

NOTICE
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.

• LEP-Series pumps 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 greater than three months should have cutters and impellers manually rotated once a month to lubricate the upper and lower seals.

Pump System Components

Control Panel

• All LEP-Series 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 by the control panel instructions.
• The panel must have provisions for the thermostats that open the motor contactors. Do not exceed voltage/current combinations for the thermostat: 24 VAC/125 VA, and 110–600 VAC/345 VA. All models have a temperature (T) class rating of T4 (135°C) with thermostats connected.
  1-phase pumps require a motor start circuit. Liberty Pumps control panels for 1-phase models contain the required start circuitry. If using a non-Liberty Pumps control panel, a start circuit will need to be installed. Table 1 contains information on the required Start Kit and its components. A complete kit may be purchased, or components can be purchased separately using the part numbers shown. Other options such as pre-wired kits are also available.

Table 1. 1-Phase Motor Start Kit

Component and Specification

| Liberty Pumps P/N|

Mfg P/N

---|---|---
1-phase Start Kit (contains all items listed separately below)| __

K001864

| __

n/a

Start Capacitor 270–324 µF 330 VAC| K001905| Mars 11070 or Equivalent
Run Capacitor 80 µF 370 VAC| K001902| Mars 12199 or Equivalent
Start Switch| K001903| Stearns SINPAC 4-7-72050-15-U03
Bleed Resistor, 15k Ω, 2 W| K001904| COTS

Applicable to Hazardous Locations

WARNING RISK OF SERIOUS INJURY OR DEATH
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®.

For hazardous locations, 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 shall not 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 T2 (300°C).

Seal Failure Probes

• Dual-seal LEP-Series pumps have a leak detection device mounted in an oil-filled cavity located between the two mechanical shaft seals. The device consists of two probes with a 200k Ω resistor mounted between them. The circuit can be tested by checking for continuity between the seal leak wires; refer to the applicable wiring diagram. If the lower (outer) 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 the 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.
• 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 a replacement relay, refer to Table 2.

Table 2. Seal Fail Replacement Relay

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

Thermostats
Dual seal LEP-Series motors have hermetically sealed heat sensors (thermostats) embedded in the motor windings to detect overheating conditions and prevent damage to the motor. The thermostats are normally closed (NC) switches that will open in the presence of excessive motor temperature. The thermostats will automatically reset when the motor has cooled to a safe temperature. The thermostats shall be wired to interrupt power to the motor contactor with a relay in the panel (cut power to the motor) if the thermostats open due to motor overheating. The pump will resume operation once the thermostats automatically reset. If there is a need to log or monitor over-temperature events, an external device will be needed. The tripping of the thermostats indicates an issue that should be investigated. Liberty Pumps control panels contain the proper circuitry to protect the motor in the event of overheating conditions.

1-phase motors contain two thermostats and 3-phase motors contain three thermostats, connected in series. The thermostats are set to open at 257°F (125°C) and automatically close at 221°F (105°C). These pumps are designed to operate under class B thresholds with a maximum temperature of 266°F (130°C), even though the motors are constructed with class H materials.

Overload Protection
LEP-Series 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 the 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.

Power and Control Cords

WARNING RISK OF ELECTRIC SHOCK

• Do not remove the cord and strain relief, and do not connect the conduit to the 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 available either permanently potted into the cord cap or field-replaceable Quick-connect cords. For either option, the cords shall not be spliced.

Wiring Instructions

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.
• 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 by the National Electrical Code®, the Occupational Safety and Health Administration, or applicable local codes and ordinances.

Control Cord Wiring

Motor Connection Wiring

Start Circuit
Pumps with B99 or C08 configuration codes

Start Circuit
Pumps with configuration code of C11 or later

Standard Quick-connect Cord, 1-Phase

Standard Quick-connect Cord, 3-Phase

Heavy-Duty Quick-connect Cord, 1-Phase

Heavy-Duty Quick-connect Cord, 3-Phase

Permanent Cord, 1-Phase

Permanent Cord, 3-Phase

Dual Voltage 3-Phase Pumps
Some models are identified on the pump model tag with dual voltage rating information. The pump is shipped from the factory configured for 200/230V but can be rewired in the field to 460V. Any rewiring of a pump must be performed by qualified personnel to retain third-party certifications.

Applicable to Hazardous Locations
Hazardous Locations rated pumps must be rewired by a repair facility that is certified to UL 674 or certified by CSA to Class Number 9088-01. These repair facilities are certified to service and repair electric motors used in Hazardous Locations. Consult Liberty Pumps if assistance is needed in finding a certified repair facility. Third-party hazardous Locations approvals will be voided if a pump is rewired, repaired, or serviced by a repair shop that is not properly certified.

Rewire Dual Voltage Pumps

Follow the steps below to access pump wiring:

1. Remove the oil plug under the warning label.

2. Unscrew the 6 socket head cap screws around the perimeter of the casting.

3. Twist while pulling upward on the casting until free from the main housing.

4. Flip the casting upside down and replace one of the screws to retain the top casting in an inverted position. The terminal block is now accessible—reference the applicable wire schematic to rewire.
   Important: Be very careful not to drop wire nuts or other debris into the motor chamber!

5. Torque terminal block screws to 20 in-lbs.

6. Once rewiring is complete, reinstall the casting.

7. Torque cap screws to 12 ft-lbs.

8. Torque oil plug to 58 ft-lbs.

9. Remove the 2the 00/230V tag from the power cord. Ensure the wired voltage is indicated on or inside the enclosure where the pump power cord terminates.

Dual Voltage Rewiring Verification
Perform the following electrical tests before placing the pump into service:

• Line-to-line resistance
• Hi-pot test
• Seal fail – 200k ohm
• Thermal – continuity

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.

Install Pump Control and Alarm Floats

• The water level in the basin 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. 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 (30 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.

Prepare Basin

• If replacing a previously installed pump, prepare the basin by removing the old pump and cleaning all debris from the basin. 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.
• When installing the pump into an existing basin with a guide rail system, make certain the pump seats properly. Some vaults have angled bottoms that might interfere with the pump legs. In this application, the pump’s legs should be trimmed as required. Liberty Pumps recommends leaving a portion of the leg so that the pump will stand upright when placed on the floor. Refer to Figure 1 through Figure 3.

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 the pump until this check is complete. Manually rotate the cutter and impeller to check that they spin 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 verifying 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 and impeller 5–10 full rotations.

Installation

WARNING RISK OF ELECTRIC SHOCK

• 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 by the National Electrical Code®, the Occupational Safety and Health Administration, or applicable local codes and ordinances.

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.

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

3-Phase Pump Rotation Verification

NOTICE
Verify 3-phase pumps for correct rotation before installing pump(s) in the 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 electricity, 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 backward (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 basin. If the pump is rotating in the wrong direction, turn off the power and reverse any two of the three power leads to the pump (not the ground). 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.

Guide Rail System
If guide rails are used, refer to the separate installation instructions supplied with the unit.

Applicable to Hazardous Locations

WARNING RISK OF FIRE

• When working in a hazardous location, all precautions to minimize ignition sources such as sparks and flame should be taken to limit the potential for fire or explosion.
• For hazardous locations, the use of a guide rail system shall be of a non-sparking design. Contact Liberty Pumps for available models.

Discharge
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 another 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.

Thermostat and Seal Failure Connections
Verify thermostat wires are connected in series with the contactor, seal fail probes are properly connected, and relay sensitivity is properly adjusted. Connections are provided on the terminal strip inside the Liberty Pumps control panel.

Seal leak relay setup:

• Turn the dial completely up, connect the leads from the pump, and then push the test button. The light should turn on. While still depressing the button, turn the dial down until the light turns off, then turn the dial up until the light turns back on. For best results, the potentiometer dial should be around 160.
• If the pump is connected directly to a seal leak relay in the panel (no test button), the dial should be set to around 75. Turn the potentiometer dial clockwise until the red light turns on, then turn the dial counterclockwise until the red light turns off. The tick marks on the seal leak relay are for reference only.

Vent
The fibreglass 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 on the tank side (option 2) or a vent flange or grommet can be installed in a hole cut into the cover (option 3).

Operation

WARNING RISK OF SERIOUS INJURY OR DEATH
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.
   • 1a. If the pump was rewired for dual voltage, confirm Dual Voltage Rewiring Verification was passed.
2. Turn pump(s) to the OFF position on the H-O-A switch.
3. Turn on breakers.
4. Test each pump separately in Hand mode and observe the operation. If the 3-phase pump is noisy or vibrates, rotation is wrong. Refer to 3-Phase Pump Rotation Verification.
5. Set the H-O-A switch(es) to AUTO position and allow water to rise in the basin until one pump starts. Allow the pump to operate until the level drops to the turn-off point.
6. Allow basin level to rise to start another pump (s). Notice the run lights in the panel. Pumps should alternate on each successive cycle of operation.
7. Turn the H-O-A switch(es) to the OFF position and allow the 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 surroundings 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 the AUTO position; pumps should start and operate together until the level drops to the 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 and submit Startup Report. Retain Report for reference. (https://www.libertypumps.com/lep/dom/Services/Warranty-Startup-Form).

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

• Do not enter a pump basin after it has been used. Sewage and effluent can emit several poisonous 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.

Applicable to Hazardous Locations

• 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 services must be performed by a repair facility approved by Liberty Pumps and certified to work on explosion-proof motor enclosures.
• Permanent-type power and control cords where the cord cap needs to be removed for replacement are not
  field-replaceable. Service for this type of damaged power or control cords must be performed by the factory or a repair facility approved by Liberty Pumps and certified to work on and recertify explosion-proof motor enclosures.

NOTICE

• Replacement impellers must match the part number of the original impeller installed from the factory. Do not trim impellers without consulting the factory.
• 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 pumps in the 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 an enclosure, loose connections, and general component condition.

Annually
The basin should be inspected and cleaned. Replace any defective components.

Service

• Pumps must be serviced at a qualified repair facility approved by Liberty Pumps. No repair work shall be carried out during the warranty period without prior factory approval. Any unauthorized field repairs void the warranty.
• Liberty Pumps, Inc. assumes no responsibility for damage or injury due to disassembly in the field. Disassembly, other than at an authorized motor enclosure repair facility approved by Liberty Pumps or its authorized service centres, automatically voids the warranty.

Applicable to Hazardous Locations

• The only allowable repairs/replacements without compromising the hazardous location rating of the pump are Quick-connect cords, lower (outer) 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.
• Hazardous Locations rated pumps must be repaired by a repair facility that is certified to UL 674 or certified by CSA to Class Number 9088-01. These repair facilities are certified to service and repair electric motors used in Hazardous Locations. Consult the factory (Liberty Pumps) if assistance is needed in finding a certified repair facility. Third-party hazardous Locations approvals will be voided if a pump is rewired, repaired, or serviced by a repair shop that is not properly certified.
• If ordinary location pumps require replacement lubrication, use ISO VG10 turbine oil (Liberty Pumps #LPOILT1032OZ) in the amounts listed. Contact Liberty Pumps to purchase quart quantities or if unsure of the proper replacement procedure.

Motor chamber quantities are approximate. When refilling the motor chamber, the upper bearing should be just submerged.

Series| Phase| Voltage| Motor Chamber [gal]| Seal Chamber [gal]
---|---|---|---|---
(X)LGV15/(X)LGH15| 3| 200, 230,

460, 575V

| ~2.2| 0.28
(X)LGV10/(X)LGH10| 3| 200, 230,

460, 575V

| ~2.55| 0.28
(X)LGV07/(X)LGH07| 3| 200, 230,

460, 575V

| ~1.48| 0.16
XLGV05/XLGH05| 3| 200, 230,

460, 575V

| ~1.72| 0.16
XLGV052/XLGH052| 1| 230V| ~1.48| 0.16
XLGV03/XLGH03| 3| 200, 230,

460, 575V

| ~1.72| 0.16
XLGV032/XLGH032| 1| 230V| ~1.48| 0.16
LGV07/LGH07| 3| 200, 230,

460, 575V

| ~1.85| 0.18
LGV05/LGH05| 3| 200, 230,

460, 575V

| ~1.90| 0.18
LGV052/LGH052| 1| 230V| ~1.85| 0.18
LGV03/LGH03| 3| 200, 230,

460, 575V

| ~2.10| 0.18
LGV032/LGH032| 1| 230V| ~1.85| 0.18

Troubleshooting
Refer to Table 3 for troubleshooting guidance.

Table 3. Troubleshooting Matrix

Problem

| Possible Cause|

Corrective Action

---|---|---
__

__

__

__

__

__

__

__

__

__

The pump does not start.

| Control panel selector switch in Off position.| Set the 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.
3-phase motor winding failure or mis-wired motor.| Check the resistance of motor windings. All three phases should have the same reading.
The float switch is unable to move to the pump ON position due to interference in a basin or other obstructions.| 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 the float switch(es).
Defective float switch.| Replace the float switch.
Obstructed impeller or volute.| Remove obstruction.
Loose wiring connections.| Check and tighten all connections.
Thermal overload tripped.| Wait for the pump to cool to the operating temperature.
__

__

__

Pump cycles too frequently.

| Improper float switch setting.| Adjust the float switch setting.
__

The check valve is 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 feedback through discharge piping.| Verify the presence of a curb stop check valve or replace the curb stop/swing check valve assembly.
__

The seal fail light is illuminated.

| The lower (outer) seal has been compromised.| Replace the lower seal.
The control panel relay sensitivity is incorrect.| Adjust the sensitivity dial.
__

__

The pump does not start and the 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 the resistance of motor windings. All three phases should have the same reading.
Obstructed impeller or volute.| Remove obstruction.
The pump operates with a selector switch in the Hand position but does not operate in the Auto position.|

Control circuits malfunctioning.

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

The motor stops and then restarts after a short period but overload heaters in the starter do not trip.

| The pump may be operating on a short cycle due to the basin being too small.| A larger basin may be required. Consult Liberty Pumps.
Water returning to the basin due to a leaking check valve.| Replace the check valve.

The pump does not deliver proper capacity.

|

The discharge gate valve is partially closed or clogged.

| Check the discharge line for foreign material, including ice if the discharge line passes through or into cold areas.
The check valve is partially clogged.| Raise the liquid level up and down to clear; remove the check valve to remove the obstruction.

Incorrect motor rotation.

| 1-phase: verify wiring, else consult the 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.

The total head is beyond the pump’s capability.

| Route discharge piping to a lower level. If not possible, a larger pump may be required. Consult Liberty Pumps.

Repeated tripping.

| Circuit protection is underrated.| Check the rating and replace it with the proper size.
Current unbalance.| Check the current draw.
Other appliances on the same circuit.| The pump requires a separate circuit.
The pump is connected to an extension cord or the 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 the pump.| Remove obstruction.
Incorrect motor rotation.| 1-phase: verify wiring, else consult the factory.

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

Foreign matter build-up.| Clean motor housing.
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 feedback through discharge piping.| Verify the presence of a curb stop check valve or replace the curb stop/swing check valve assembly.
High-level alarm triggering.| Missing or faulty curb stop/swing check valve allowing system pressure to feedback through discharge piping.| Verify the presence of a curb stop check valve or replace the curb stop/swing check valve assembly.
---|---|---
The pump runs but does not turn off.| The pump is air-locked.| Turn the pump off and let set for several minutes, then restart.
The float switch is unable to move to the pump OFF position due to interference with the side of the basin or another obstacle.| Position the pump or float switch so that it has adequate clearance for free movement.
Control panel selector switch in Hand position.| Set the selector switch to the Auto position.
Control panel failure.| Check the control panel.
Defective float switch.| Replace the float switch.
Missing or faulty curb stop/swing check valve allowing system pressure to feedback through discharge piping.| Verify the presence of a curb stop check valve or replace the curb stop/swing check valve assembly.
The 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.
The check valve is stuck closed or installed backward.| Remove check valve(s) and examine for freedom of operation and proper installation.
The gate or ball valve is closed.| Open gate or ball valve.
The total head is beyond the 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.
The pump is air-locked.| Turn the pump off and let set for several minutes, then restart.
Add a baffle to reduce trapped air bubbles.
Capacitor failure in the control panel.| Check capacitors and replace them if needed.
Stuck/defective motor contactor in the control panel.| Replace motor contactor.
The pump is not seated correctly in the guide rail base.| Lift pump and re- position.

The pump operates noisily.

| Piping attachments to buildings are too rigid.| Replace a portion of the discharge line with a rubber hose or connector.
---|---|---

Incorrect motor rotation.

| 1-phase: verify wiring, else consult the factory.

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

The pump is being run below the 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 the pump to an authorized repair facility.

The pump runs periodically when fixtures are not in use.

|

The check valve is 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.

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 18 months from the date of installation or 24 months from the date of manufacture, whichever occurs first, provided that such products are used in compliance with their intended applications as outlined 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 the 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 centre, and provided that none of the following warranty-voiding characteristics is evident:

The manufacturer shall not be liable under this Warranty if the product has not been properly installed or maintained by 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 the installation or use of its products, or for consequential damages, including field labour 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 warranties are excluded.

https://www.libertypumps.com/lep/dom/Services/Warranty-Startup-Form.

Copyright © Liberty Pumps, Inc. 2024 All rights reserved.

References

• Liberty Engineered Products - Domestic
• p65warnings.ca.gov
• Landing
• Services
• Startup Warranty Registration

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