Liberty Pumps AE21L=3, AE24L=3, AE21H=3, AE21L=4, AE21H=4 Installation Manual

Single Phase Duplex

ELECTRICAL SHOCK HAZARD

Disconnect power before installing or servicing
this product. A qualified service person must install
and service this product according to applicable
electrical and plumbing codes.

EXPLOSION OR FIRE HAZARD

Do not use this product with flamable liquids
Do not install in hazardous locations as defined
by National Electrical Code, ANSI/NFPA 70.

Failure to follow these precautions could result in serious injury or death. Replace product immediately if switch cable becomes damaged

or severed. Keep these instructions with warranty after installation. This product must be installed in accordance with National Electric

Code, ANSI/NFPA 70 so as to prevent moisture from entering or accumulating within boxes, conduit bodies, fittings, float housing, or cable.

AE21L=3, AE21H=3, AE21L=4, AE21H=4

AE24L=3, AE24H=3, AE24L=4, and AE24H=4

Manufactured by SJE-Rhombus

Installation Instructions and Operation/Troubleshooting Manual

7000 Apple Tree Avenue

Bergen, New York 14416

Phone: [phone]

Email: [e-mail]

www.libertypumps.com

This control panel must be installed and serviced by a licensed electrician in accordance

with the National Electric Code NFPA-70, state and local electrical codes.

All conduit running from the sump or tank to the control panel must be sealed with conduit sealant
to prevent moisture or gases from entering the panel. NEMA 1 enclosures are for indoor use only,
primarily to provide a degree of protection against contact with enclosed equipment. Cable connectors
are not required to be liquid-tight in NEMA 1 enclosures. Do not use NEMA 1 enclosures if subjected

to rain, splashing water or hose-directed water. NEMA 4X enclosures are for indoor or outdoor
use, primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing
water and hose-directed water. Cable connectors must be liquid-tight in NEMA 4X enclosures.

®

Warranty void if panel is modifi ed.

Call factory with servicing questions:

7249000B

1-800-543-2550

Installation Instructions

Most single phase duplex panels are designed to operate as
three or four fl oat systems. The three fl oat system is standard
performing the common pump stop, lead pump start, and lag
pump start/high level alarm functions. The four fl oat system
utilizes separate fl oats for lag pump start and high level alarm.

NOTE: Options ordered may affect the number of fl oats and
their functions. Please reference the schematic provided
with the control panel for proper installation.

Installation of Floats

CAUTION: If control switch cables are not wired and mounted in
the correct location, the pump system will not function properly .

WARNING: Turn off all power before installing fl oats in pump
chamber. Failure to do so could result in serious or fatal
electrical shock.

1. Use fl oat label kit to identify and label cables on both
fl oat and stripped ends (stop, lead, lag, alarm, etc.). See
schematic for fl oat options.

2. Determine your normal operating level, as illustrated in

Figures 1-2.

FIGURE 1: Three fl oat duplex

FIGURE 2: Four fl oat duplex

FIGURE 3: Internally weighted fl oat

3. Mount fl oat switches at appropriate levels as illustrated in
Figures 3-5. Be sure that fl oats have free range of motion

without touching each other, or other equipment in the basin.

If using the mounting clamp; follow steps 4-6.

4. Place the cord into the clamp as shown in Figure 5.

5. Locate the clamp at the desired activation level and secure
the clamp to the discharge pipe as shown in Figure 5.

NOTE: Do not install cord under hose clamp.

6. Tighten the hose clamp using a screwdriver . Over tightening

may result in damage to the plastic clamp. Make sure the
fl oat cable is not allowed to touch the excess hose clamp
band during operation.

NOTE: All hose clamp components are made of 18-8

stainless steel material. See your SJE-Rhombus® supplier
for replacements.

FIGURE 4: Float with cable weight

FIGURE 5: Mounting clamp detail

7249000B

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Installation Instructions

Mounting the control panel

1. Determine mounting location for panel. If
distance exceeds the length of either the fl oat
switch cables or the pump power cables,
splicing will be required. For outdoor or wet
installation, we recommend the use of a SJE­Rhombus® liquid-tight junction box with liquid­tight connectors to make required connections.

You must use conduit sealant to prevent
moisture or gases from entering the panel.

2. Mount control panel with mounting fl anges

furnished with control panel.

8. Run conduit to junction box. Drill proper size
holes for the type of conduit used. Attach liquid­tight connectors to junction box.

9. Identify and label each wire before pulling
through conduit into control panel and junction
box. Pull pump power cables and control switch
cables through connectors into junction box.
Make wire splice connections at junction box.

10. Firmly tighten and seal all fi ttings on junction
box. Insure all cable connectors are liquid-tight
and sealed.

3. Determine conduit entrance locations on control
panel. Check local codes and schematic for
the number of power circuits required.

NOTE: Be sure the incoming power, voltage,

amperage, and phase meet the requirements
of the pump motors being installed. If in doubt,
see the pump identifi cation plate for electrical
requirements.

4. Drill proper size holes for type of connectors
being used.

NOTE: If using conduit, be sure that it is of

adequate size to pull the pump and switch
cables through. You must use conduit

sealant to prevent moisture or gases from
entering the panel.

5. Attach cable connectors and/or conduit

connectors to control panel.

11. If a junction box is not required, connect
pump and fl oat wires to proper position on
terminals. See schematic inside control panel
for terminal layouts.

12. Connect control/alarm and pump power
conductors to proper position on terminals.
See schematic inside control panel for terminal
connections.

NOTE: It is the recommendation of the factory to

use separate pump and control/alarm power
sources.

VERIFY CORRECT OPERATION OF CONTROL

P ANEL AFTER INST ALLATION

IS COMPLETE.

FOR INSTALLATION REQUIRING A SPLICE,

FOLLOW STEPS 6-10;

FOR INSTALLATION WITHOUT A SPLICE,

GO TO STEP 11.

6. Determine location for mounting junction box
according to local code requirements. Do not
mount the junction box inside the sump or
basin.

7. Mount junction box to proper support.

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Operations

Single phase duplex panels are designed to oper­ate with three or four fl oats for pump sequencing.
The standard fl oat functions are common pump
stop, lead pump start, lag pump start/alarm (three

fl oats), or separate lag and alarm fl oats (four
fl oats).

Three Float Operation: As the liquid level rises
to the stop fl oat and tips it to the ON (closed)
position, the panel will remain inactive. As the
liquid level tips the lead fl oat, the lead pump will
start. If the liquid level tips the lag/alarm fl oat, the
lag pump will start and the audio/visual alarm will
activate. Both pumps and the alarm will remain
active until the liquid level drops and the lag fl oat
is in the OFF (open) position. At this time the alarm
will silence. Both pumps will remain on until the
liquid level drops to normal and all three fl oats
are in the OFF (open) position. When both pumps
have stopped running, the alternator will switch
the lead pump and lag pump operating functions
in the next sequence.
Four Float Operation: The alarm will activate
and remain on only if the alarm fl oat is tipped to
the ON (closed) position.

Control and Alarm Lights

Lights will illuminate when control/alarm power is
supplied.

Float Status Lights

Lights will illuminate when the respective fl oat is
in the closed position.

Circuit Breaker (optional)

The pump circuit has a thermal-magnetic circuit
breaker which provides pump disconnect and
branch circuit protection.

Dry Auxiliary Contacts
(standard feature)

Normally open - Contacts are open under nor­mal conditions and closed when alarm condition
is present.
Normally closed - Contacts are closed under
normal conditions and open when alarm condition
is present. Both types automatically reset once
alarm condition is cleared.

Alarm System (Horn and Indicator ­standard)

When an alarm condition occurs, a red light and
a horn will be activated. If the test/normal/silence
switch is moved to the silence position, the horn
will be silenced. When the alarm condition is
cleared, the alarm system is reset. The alarm
system can be tested by moving the test/normal/
silence switch to the test position.

HOA Switch

A hand-off-automatic switch is provided for each
pump. In the hand mode, the pump will turn on
unless other safety features are employed. In
the automatic mode, the pump will turn on from
commands by the fl oat switch(es).

Pump Run Lights

The run light will be ON in either the hand or the
automatic mode when the pump is called to run.

NOTE: Some options ordered may not be included
in this manual. Certain options will require alterna­tive circuitry not including fl oat status and control/
alarm indicators.

For information regarding the operations

of options not listed here or servicing

questions, please call a Liberty Pumps

customer service technician at

1-800-543-2550

Warranty void if panel is modifi ed.

Control and Alarm Fusing

The control circuit and alarm circuit are fused
separately.

7249000B

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