Liberty Pumps LGH Series Installation Manual Download Page 1

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Installation

Manual

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.

Installer: manual must remain with owner or

system operator/maintainer.

Record information from pump nameplate:

Model:

Serial:

Control Panel:

Mfg Date:

Install Date:

Dealer:

Dealer Ph:

7000 Apple Tree Avenue

Bergen, NY 14416

ph: 1-800-543-2550

fax: 1-585-494-1839

www.LibertyPumps.com/LEP

7550000G

LGV-Series

LGH-Series

Ordinary Location Models

XLGV-Series

XLGH-Series

Approved for Hazardous Locations

Class 1, Division 1, Groups C and D

Class 1, Zone 1, Groups IIA and IIB

3–15 hp

Submersible

Grinder Pumps

Summary of Contents for LGH Series

Page 1: ... system pressures Installer manual must remain with owner or system operator maintainer Record information from pump nameplate Model Serial Control Panel Mfg Date Install Date Dealer Dealer Ph 7000 Apple Tree Avenue Bergen NY 14416 ph 1 800 543 2550 fax 1 585 494 1839 www LibertyPumps com LEP 60 Hz 7550000G LGV Series LGH Series Ordinary Location Models XLGV Series XLGH Series Approved for Hazardo...

Page 2: ...wer 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...

Page 3: ... 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 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 pum...

Page 4: ...t trim impellers without consulting the factory 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 Inspection and Storage Initial Inspection The pump should be immediately inspected for damage that may have occurred in shipment 1 Visually check the pump ...

Page 5: ...onents can be purchased separately using the part numbers shown Other options such as pre wired kits are also available Control Panels 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 For hazardous locations the control panel must be installed outside the hazardous area a...

Page 6: ... 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 h...

Page 7: ...K POTTING RESIN RED WHITE ORANGE RUN CAP 80 MFD 370 VAC START CAP 270 324 MFD 330 VAC SEAL LEAK POWER CORD CONTROL CABLE ORANGE RED RED WHITE WHITE GREEN GREEN BLACK BLACK THERMOSTAT M3 M2 M1 L3 L2 L1 MOTOR GRAY BROWN BROWN GREEN GRAY THERMOSTAT SEAL FAILURE PROBES POTTING RESIN FOR HAZLOC PUMPS M3 M2 M1 1 6 7 2 4 8 3 5 9 200 230V 3PH 2D 460V 3PH 1D 15HP MODELS ONLY M3 M2 M1 1 1 2 2 3 1 2 3 3 7 7 ...

Page 8: ...e 1 and Figure 2 Figure 1 Cut off Point 3 7 hp Pumps Figure 2 Cut off Point 10 15 hp Pumps Cutter and Impeller Free Movement Check 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 and impeller to check that they spin freely wit...

Page 9: ... 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 consist...

Page 10: ...le 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 togethe...

Page 11: ...ps 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 hazardous repair facility for electrical and motor service This will ensure the integrity of the hazardous location rating of the pump and comply...

Page 12: ...ctive 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 Pump operates with selector switch in Hand position but does not operate in Auto position Control circuits malfunctioning Check float switch level control or al...

Page 13: ...essure 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 ...

Page 14: ... 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 ...

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