Liberty Pumps P372LE41, P382LE41V, P382LE41SD, P373LE41, P383LE41 Installation Manual

©Copyright 2015 Liberty Pumps Inc. All Rights Reserved.

IMPORTANT:
Prior to installation, record Model, Serial Number,

and Code Number from pump nameplate for future
reference.

MODEL ________________________
SERIAL ________________________
CODE ________________________
INSTALLATION

DATE ________________________

Pumps

7000 Apple Tree Avenue
Bergen, NY 14416
Phone: [phone]
Fax: [phone]
www.libertypumps.com

Contents

1.) General Information

2.) The Basin

3.) Installation and Connections

4.) QuickTree® and Access Cover

5.) Electrical Service and Operation

6.) Maintenance and Troubleshooting

Installation Manual 7225000G

Pro-Series Sewage Systems

Models

Pro370-Series

21” x 30” System

41 Gallons

Pro380-Series

24” x 24” System

41 Gallons

Pro680-Series

28” x 24” System

46 Gallons

2

Before installation, read the following instructions carefully. Each Liberty pump is individually factory tested to ensure proper
performance. Closely following these instructions will eliminate potential operating problems, assuring years of trouble-free service.

 Risk of electric shock. To reduce risk of electric shock, always disconnect pump from power source before handling.
 The electrical connections and wiring for a pump installation should only be made by qualified personnel.
 This pump is supplied with a grounding conductor or a grounding-type attachment plug. To reduce the risk of electric shock,

be certain that the grounding conductor is connected only to a properly grounded control panel or, if equipped with a
grounding-type plug, that it is connected to a properly grounded, grounding-type receptacle.

 Do not bypass grounding wires or remove ground prong from attachment plugs.
 Do not remove cord and strain relief, and do not connect conduit to pump.
 Do not use an extension cord.
 This pump requires separate, properly fused and grounded branch circuit. Make sure the power source is properly sized for

the voltage and amperage requirements of the motor, as noted on the pump nameplate.

 The electrical outlet or panel shall be within the length limitations of the pump power cord, and at least 4 feet above floor level

to minimize possible hazards from flood conditions.

 These pumps are not to be installed in locations classified as hazardous in accordance with the National Electric Code,

ANSI/NFPA 70.

 The installation must be in accordance with the National Electric Code and all applicable local codes and ordinances.

 Do not use these pumps in water over 140F.
 The Uniform Plumbing Code (UPC) 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.

Pro-Series System: The Pro-Series 370, 380, and 680 systems are shipped from the factory fully assembled with a wide range of
possible pumps. The following chart lists the pumps available in the Pro370, Pro380, and Pro680. Your specific pump is identified by
the model number on the nameplate attached to the Pro-Series cover.
Systems ordered with alarm option have an “/A” suffix designating the alarm. “/A2” …ALM-2, “/A2W” …ALM-2W, “/A3” …ALM-3
Side discharge systems will have SD attached to the pump model. “P382LE41SD-2, P382LE51SD-2/A2W, …”

MO DE L SP E CIF ICA TION S

System Model

Pump
Model

HP

Volts

Phase

Full Load

Amps

Solids

Handling

Discharge

Shut-off

Head (no-flow)

P372LE41, P382LE41(V)
P382LE41SD
P373LE41, P383LE41
P682XLE41

LE41M
LE41A
LE41M
LE41M

4/10
4/10
4/10
4/10

115
115
115
115

1
1
1
1

12
12
12
12*

2”
2”
2”
2”

2” FNPT
2” PVC NIPPLE
3” FNPT
2” FNPT

17’
17’
17’
17’

P372LE51, P382LE51(V)
P382LE51SD
P373LE51, P383LE51
P682XLE51

LE51M
LE51A
LE51M
LE51M

1/2
1/2
1/2
1/2

115
115
115
115

1
1
1
1

12
12
12
12*

2”
2”
2”
2”

2” FNPT
2” PVC NIPPLE
3” FNPT
2” FNPT

25’
25’
25’

25’

P372LE52, P382LE52
P373LE52, P383LE52
P682XLE52

LE52M
LE52M
LE52M

1/2
1/2
1/2

208-230
208-230
208-230

1
1
1

6.8

6.8

6.8*

2”
2”
2”

2” FNPT
3” FNPT
2” FNPT

25’
25’
25’

P372LE71, P382LE71
P373LE71, P383LE71

LE71M
LE71M

3/4
3/4

115
115 1 1

12
12

2”
2”

2” FNPT
3” FNPT

28’
28’

P372LE72, P382LE72
P373LE72, P383LE72

LE72M
LE72M

3/4
3/4

208-230
208-230

1 1 6 6 2”

2”

2” FNPT
3” FNPT

28’
28’

P372LE102, P382LE102
P373LE102, P383LE102

LE102M
LE102M

1 1 208-230
208-230

1 1 7 7 2”

2”

2” FNPT
3” FNPT

36’
36’

NOTE: LEH-Series High-Head pumps require a minimum application of 15’ head.

P372LEH102, P382LEH102
P373LEH102, P373LEH102

LEH102M
LEH102M

1 1 208-230
208-230

1 1 12
12

2”
2”

2” FNPT
3” FNPT

53’
53’

1. General Information

Note: (V) denotes that the system is available with a vertical float.
*Amperage values are shown per pump. In a duplex system (P680), electrical service should be sized to accommodate both pumps.

3

In most systems, pump and alarm floats are pre-set on the QuickTree® system at proper operating levels. Do not adjust floats.
Was your system sized by a professional? Minimum fluid flows are required in sewage applications. Consult Factory for proper pump

sizing prior to installation.
QuickTree® Technology: The Pro-Series basins by Liberty Pumps (excluding side discharge models) feature new QuickTree® float

system technology. The QuickTree® system is located under a separate access cover for ease of maintenance and service. Floats for
both pump activation and alarm (if equipped) are mounted on a stainless steel tree (rod), separate from the pump. There is no need to
disconnect plumbing or remove the pump to inspect service or replace floats. QuickTree® floats are preset at the factory for optimum
operating levels and should not be adjusted.

The Pro-Series Systems features a clear disposable construction cover designed to protect the system during rough-in and masonry
work. The protective cover should remain in place until finish plumbing; however, can be removed and reinstalled if required. The
cover is snapped into the threaded ports of the discharge and vent. To remove the clear cover, simply pull upward disengaging it from
the discharge and vent holes.

In Ground Installation of Pro-Series Basins

A. Excavation: Excavate the hole as small as possible, with a minimum recommended 8" diametrical clearance around the tank.

Never place the basin directly in contact with rocks or other sharp objects. Place only fine, 1/8" to 3/4" pea gravel or 1/8" to 1/2"
washed, crushed stone as bedding between the basin and the hole walls. Do not use sand or native soil as backfill. Properly
compact underneath the basin to provide a solid, level base that can support the weight of the filled basin. It is recommended that
the top lip of the basin be level with the finished floor.

B. Initial Backfill: Only fine, 1/8" to 3/4" pea gravel or 1/8" to 1/2" washed, crushed stone should be used around the bottom of the

basin to hold it in place. Do not use sand or native soil as backfill. Make the inlet connection as required for your basin.

C. Inlet Connection: The Liberty Pro-Series basins have a 4" inlet molded to the side of the tank. This inlet is sized to accept a 4"

no-hub type coupling. Connect the gravity drainage line from the fixtures to this hub.

D. Final Backfill: Large rocks, clods, and foreign objects should be kept out of the backfill material. Only fine, 1/4" to 3/4" pea

gravel, or 1/8" to 1/2" washed, crushed stone is recommended. Do not use sand or native soil as backfill. Mound the backfill
slightly and allow for natural settling. Provide access to the basin cover for maintenance and service.

Do not exert heavy pressure or run heavy equipment on the backfill material as this could cause the

tank to collapse.

Dimensional Data

2. The Basin

Pro370

Pro380

Pro380 Side Discharge

Pro680

4

A. Discharge: Using an adapter, connect the discharge pipe to the threaded

2” or 3” port provided on the cover (or the 2” PVC nipple used on side
discharge models). IMPORTANT: Do not reduce the discharge pipe
size below that which is provided on the pump. Sewage pumps should
not be smaller than 2". In some applications, it may be necessary to
increase the pipe size to reduce friction losses. Contact Liberty Pumps if
you have questions regarding proper pipe sizes and flow rates. Install the
remaining discharge line. In vertical discharge applications, a union should
be installed just above the cover to facilitate pump removal if necessary
(side discharge applications are equipped with an in-basin union).

In both vertical and side discharge models, a check valve is recommended after the union to prevent the backflow of liquid after
each pumping cycle. A gate or ball 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 restrict the discharge below 2" in sewage applications. Larger pipe sizes may be required to eliminate friction
head loss over long runs. Contact Liberty Pumps or other qualified person if there are questions regarding proper pipe size and
flow rates.

B. Vent: On vertical discharge P370 and P380 models, a threaded 2” or 3” connection is provided on top of the cover. On P680

models a 2” or 3” slip type Uni-Seal is provided. The vent must be piped to the existing building vent, or extended outside on its
own standpipe. On both side and vertical discharge systems, the vent size should be in accordance with applicable codes, but not
less than the discharge size.

Note: Pro-Series systems shipped with steel pipe option have a rubber grommet seal on the discharge instead of female NPT
connections.

Vertical Discharge P380

3. Installation and Connections

Side Discharge P380

P680

(Vertical Discharge only)

5

Typical Installation

This is a recommended vertical discharge installation only. Variations may apply.

6

Vertical discharge Pro-Series P370, P380 and P680 systems feature QuickTree® technology. The QuickTree® float system uses a
stainless steel mounting rod (tree) and specially designed cord clamping brackets to affix the pump float and (optional) alarm float in the
system. All floats are pre-set at the factory at optimum levels and do not require adjustment. NOTE: Field adjusting floats

may cause improper activation or turn-off of the pump and optional alarm.
QuickTree® removal and float inspection: The QuickTree® system is located under the separate access cover to help ease

inspection, service, and replacement of a float. To inspect the float(s), simply unbolt the access cover and lift out the QuickTree®
assembly from its holder. There is no need to disconnect plumbing or remove the pump. Vertical discharge Pro-Series systems
feature a manual LE-series pump (with no switch attached directly to the pump). Operation of the pump is accomplished by the
QuickTree® system. Note: Side discharge Pro-Series systems are equipped with an automatic LE-series pump.

Re-inserting the QuickTree®: After service or inspection of the floats, re-insert the QuickTree® into its holder. Cords from the pump,
float switch and optional alarm need to be properly sealed as described below in the Integrated Cord Seal System.

Integrated Cord Seal System: It is important that cords from the pump motor, float switch and optional alarm float are sealed in the
specially designed rubber sealing channels under the access cover. Proper sealing is required to keep sewer gas from leaking from the
system. Place the cords securely in the rubber channels as shown in FIGURE B. being careful to remove excessive cord “slack” from
inside the system. IMPORTANT: Three cord channels are provided. For systems without the alarm option, only two channels will be
used and the third must be “plugged” with an attached rubber plug seal. SEE FIGURE C. If the alarm cord is present, all three
channels will be used. All rubber cover gaskets are permanently attached and do not require replacement.

IMPORTANT: Proper cord sealing – behind QuickTree® rod

RUBBER PLUG SEAL

4. QuickTree® and Access Cover

7

QuickTree® settings for Vertical Discharge Pro370 and Pro380 Systems:

When servicing the QuickTree®, place the switch cord into the trough or channel and then slip the stainless steel rod through the
clamp. Tighten the screw with a Phillips screw driver, being sure not to over tighten. Flats have been stamped on the rod to designate
float position, and the screw should be tightened onto the flat. The tether length is the amount of cord between the clamp and float.

TETHER LENGTH (SWITCH TO CLAMP)

ROD

POSITION Alarm Float Control Float Alarm Float Control Float

1 3.5"
2 3.5"
3 3.0"
4 3.5"

Pro370

Pro380 and Pro680

8

Fig. 5 – Direct Wiring of 115V or 208-230V,

Single Phase, Automatic Pumps

TEMPORARY

MANUAL

OPERATION

DO!

DON’T!

Fig. 4 Piggyback plug installation.

 Risk of electric shock. Always disconnect the pump from the power source before handling or making adjustments.
 The electrical connections and wiring for a pump installation should only be made by qualified personnel.

 This pump is supplied with a grounding conductor or a grounding-type attachment plug. To reduce the risk of electric shock, be

certain that the grounding conductor is connected only to a properly grounded control panel or, if equipped with a grounding-type
plug, that it is connected to a properly grounded, grounding-type receptacle.

 Do not bypass grounding wires or remove ground prong from attachment plugs.
 Do not remove cord and strain relief, and do not connect conduit to pump.
 Do not use an extension cord.
 This pump requires separate, properly fused and grounded branch circuit. Make sure the power source is properly sized for the

voltage and amperage requirements of the motor, as noted on the pump nameplate.

 The electrical outlet or panel shall be within the length limitations of the pump power cord, and at least 4 feet above floor level to

minimize possible hazards from flood conditions.

 The installation must be in accordance with the National Electric Code and all applicable local codes and ordinances.

All P370 and vertical discharge P380 & P680 models come factory-equipped with the float switch mounted on the QuickTree®
assembly. These models come with two cords - one to the float switch and the other to the pump motor. The switch cord has a series
(piggyback) plug enabling the pump (motor) cord to be plugged into the back of it (See Fig.4). The purpose of this design is to allow
manual operation of the pump.

For automatic operation the two cords should be interconnected and plugged into a separately fused, grounded outlet of proper amp
capacity for your selected pump model. (See Section 1, General Information, or the pump nameplate for electrical specifications of
your model.) Both cords are equipped with 3-prong plugs and must be plugged into a properly grounded 3-wire receptacle. DO NOT

REMOVE THE GROUND PRONGS.
For manual operation, or in the event of switch failure, the

pump cord can be separated and plugged into the electrical
outlet, directly bypassing the switch. 208-230V single phase
pumps should only be operated without the float switch by
using the circuit breaker or panel disconnect. Do not let the
pump run dry for extended periods.

If the pump is to be wired directly into a control device or
junction box, and it is necessary to remove the plugs, have a
certified electrician do the wiring in accordance with the
National Electric Code and applicable local codes. See Fig. 5
for direct wire installation of single phase, automatic pumps.

In 208-230V installations, one side on
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.

5. Electrical Service and Operation

9

P680 duplex systems are connected to a controller that monitors the operation of the pumps. The controller will automatically alternate
the two pumps each cycle to maintain equal wear. It will also monitor for high water conditions and alarms if necessary. The controller
has visual indicators that show the operation of the sump as well as operator controls to test functionality. The controller will also
identify a non-functioning component. For complete operation please reference the user manual for the controller.

Liberty offers both an indoor and outdoor version of the controller. Note, the cord ends must be removed in order to wire the outdoor
version.

MODELS:
PDC-115
PDC-230
(INDOOR)

MODELS:
PDCW-115
PDCW-230
(OUTDOOR)

10

Risk of electric shock. Always disconnect the pump from the power source before handling or making
adjustments.



NOTE: Liberty Pumps, Inc. assumes no responsibility for damage or injury due to disassembly in the field. Disassembly, other than at

Liberty Pumps or its authorized service centers, automatically voids warranty.

Problem

Cause

Correction

Pump will not run.

 Blown fuse or other interruption of

power; improper voltage.

 Check that the unit is securely plugged in.

Have an electrician check all wiring for proper
connections and adequate voltage and
capacity.

 Switch is unable to move to the

“turn on” position due to

interference with the side of basin
or other obstruction

 Position the pump or switch so that it has

adequate clearance for free operation.

 Insufficient liquid level.

 Make sure the liquid level is allowed to rise

enough to activate switch(s).

 Defective switch.

 Remove and replace switch.

Pump will not turn
off.

 Switch(s) unable to move to the

“turn off” position due to

interference with the side of basin
or other obstacle.

 Position the pump or switch so that it has

adequate clearance for free operation.

 Defective switch.

 Remove and replace switch.

Pump runs or hums,
but does not pump.

 Discharge is 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 backwards.

 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 lift is beyond pump's

capability.

 Try to route piping to a lower level. If not

possible, a larger pump may be required.
Consult the factory.

 Pump impeller is jammed or volute

casing is plugged.





Remove the pump from the basin. Detach the
pump base and clean the area around the
impeller. Reassemble and reinstall.

Pump runs
periodically when
fixtures are not in
use.

 Check valve was not installed, is

stuck open or is leaking.

 Remove check valve(s) and examine for

freedom of operation and proper installation.

 Fixtures are leaking.

 Repair fixtures as required to eliminate leakage.

Pump operates
noisily.

 Foreign objects in the impeller

cavity.





Remove the pump from the basin. Detach the
pump base and clean the area around the
impeller. Reassemble and reinstall.

 Broken impeller.

 Consult the factory for information regarding

replacement of impeller.

 Worn bearings.

 Return pump to the factory or authorized repair

station for repair.

 Piping attachments to building are

too rigid.

 Replace a portion of the discharge line with

rubber hose or connector.

6. Maintenance and Troubleshooting

11

Supplemental Installation Instructions

PRO 370XL/380XL/680XL Series 10’ stack test basins

XL Series sewage ejector basins are designed to withstand the 10’ stack test required by some municipalities. Proper installation of the
specified cover flange is essential to ensure that the test is met. Strict adherence to these instructions is required. Under no
circumstances should the cover be installed in a manner inconsistent with these instructions.

Types of Systems:

XL Series Basins are available as Fully Assembled Systems complete with pump and discharge piping, as Basin and Cover Assembly
Kits with no pump or plumbing, and as Basins only. Please follow the instructions below as required to correspond to the type of
system you have.

Basin Installation:

1. For all systems refer to the primary instructions as supplied with this Ejector System or Basin for excavating the pit, plumbing
connections, and backfilling.

2. If the top of the 370XL, 380XL, 680XL Series basin is below grade, an access riser model ARC18 is required. The maximum

burial depth of 18" with respect to the top of the basin. Consult Liberty Pumps or your distributor for more information on ARC
Series Access Risers. 1-800-543-2550.

Installing the pump in the XL Series Basin or XL Basin and Cover Assembly Kit:

1. Liberty Pumps XL Series Basins as purchased separately will require the appropriate 16-bolt Pro-Series cover assembly to make
an effectively sealed ejector system. Contact the factory for the proper cover for your application.

2. Size the length of the discharge piping to reach from the discharge of the pump to be within the discharge pipe socket with integral
lip seal on the underside of the Pro-Series cover. Liberty Pumps sewage pumps will use threaded-one-end (TOE) nipples of

23.75" length for 370XL Series Basins, or 17.50" long for 380XL and 680XL Series Basins. Install the pipe into the threaded
discharge of the pump.

3. Lower the pump into the basin, fitting the pump legs into the Torque Stops.

4. Insert power cord for the pump -- and the piggyback switch cord, if so equipped -- through the underside of the inspection cover
hole and position cover over pipe nipple while aligning the bolt holes. Use sixteen 1/4 - 20 UNC bolts and washers to secure cover
to the basin. Tighten bolts to 40 inch-pounds. WARNING: Do not over tighten bolts. The soft, integral gasket will conform to the
top of the tank. The bolts may be re-torqued up to 60 inch-pounds to seal any leaks that may occur during a 10' stack test.
Additionally, a small amount of RTV silicone sealant may be used should the gasket or inserts be damaged.

5. Liberty Pumps recommends the use of manual type pumps and the appropriate Liberty QuickTree® Switch Kit for mounting of
pump control and alarm floats. Contact the factory for ordering information. Install the QuickTree® Kit per the instructions included.
Liberty Pumps automatic type pumps with piggyback float switches may also be used. Lay the power cable and switch cable in the
grooves in the inspection cover recess as is shown in the primary instructions as included with this system. Attach the inspection
cover to the main cover using six 1/4 - 20 UNC bolts and washers. Tighten the bolts furthest away from the power cord grooves
first, torqueing to 40 inch-pounds. WARNING: Do not over tighten bolts. The soft, integral gasket will conform to the top of the
cover and power cords. The bolts may be re-torqued up to 60 inch-pounds to seal any leaks that may occur during a 10' stack test.
Additionally, a small amount of RTV silicone sealant may be used should the gasket or inserts be damaged.

370XL and 380XL Series Basins IAPMO listed, # 4361