Liberty Pumps LGV Series Installation Manual

3–15 hp submersible grinder pumps

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Installation manual (16 pages)

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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:

7550000G

LGV-Series

LGH-Series

Ordinary Location Models

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

3–15 hp

Submersible

Grinder Pumps

7000 Apple Tree Avenue

Bergen, NY 14416

ph: 1-800-543-2550

fax: 1-585-494-1839

www.LibertyPumps.com/LEP

60 Hz

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Summary of Contents for Liberty Pumps LGV Series

Page 1 Installer: manual must remain with owner or system operator/maintainer. Record information from pump nameplate: Model: Serial: Control Panel: Mfg Date: Install Date: Dealer: 7000 Apple Tree Avenue Bergen, NY 14416 Dealer Ph: ph: 1-800-543-2550 fax: 1-585-494-1839 www.LibertyPumps.com/LEP Copyright © Liberty Pumps, Inc. 2022 All rights reserved.
Page 2  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. 2 | EN Copyright © Liberty Pumps, Inc. 2022 All rights reserved. 7550000G...
Page 3  For cord replacement: power cord must be of the same length  Wear adequate Personal Protective Equipment when working and type as originally installed on the Liberty Pumps product. on pumps or piping that have been exposed to wastewater.
Page 4 Check for damaged electrical wires, especially where they exit the motor housing. Model Specifica tions Contact Liberty Pumps customer service to report any damage or shortage of parts. 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.
Page 5 1-phase models contain the required start control panels contain the proper circuitry to protect the motor in circuitry. If using a non-Liberty Pumps control panel, a start circuit the event of overheat conditions. will need to be installed. Table 1 contains information on the 1-phase motors contain two thermostats and 3-phase motors required Start Kit and its components.
Page 6 The LEP-Series control panels by Liberty Pumps have a seal leak detection system with a test button that monitors the integrity of...
Page 7 PROBES Start AUX MAIN MOTOR LEAD NO. COLOR 15HP MODELS ONLY blue white 200/230V 3PH (2D) 460V 3PH (1D) orange THERMOSTAT yellow black purple pink gray brown 7550000G Copyright © Liberty Pumps, Inc. 2022 All rights reserved. 7 | EN...
Page 8 RISK OF ELECTRIC SHOCK Liberty Pumps recommends leaving a portion of the leg so that the pump will stand upright when placed on the floor. Refer to  All installation and maintenance of pumps, controls, protection devices, and general wiring shall be done by Figure 1 and Figure 2.
Page 9 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...
Page 10 Turn on breakers.  All electrical and motor repairs and service must be performed by a repair facility approved by Liberty Pumps and Test each pump separately in Hand mode and observe certified to work on explosion-proof motor enclosures.
Page 11 (outer) shaft seals, volute, and impeller components. certified to work on Explosion Proof motors. Otherwise, the pump must be returned to Liberty Pumps or an To keep the pump/pump system operating smoothly, perform the authorized hazardous repair facility for electrical and motor following routine checks.
Page 12 Obstructed impeller or volute. Remove obstruction. Lower (outer) seal has been compromised. Replace lower seal. Seal fail light is illuminated. Control panel relay sensitivity is incorrect. Adjust sensitivity dial. 12 | EN Copyright © Liberty Pumps, Inc. 2022 All rights reserved. 7550000G...
Page 13 Verify presence of a curb stop check valve or High level alarm triggering. allowing system pressure to feed back through replace curb stop/swing check valve assembly. discharge piping. 7550000G Copyright © Liberty Pumps, Inc. 2022 All rights reserved. 13 | EN...
Page 14 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.

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