Liberty Pumps LCU-N Series User manual

Installer: Manual must
remain with owner/operator.
Prior to installation, record information
from pump nameplate for future reference:
Model:
7000 Apple Tree Avenue
Bergen, NY 14416
ph: 1-800-543-2550
fax: [phone]
www.LibertyPumps.com
Keep this manual handy for future reference.
For replacement manual, visit LibertyPumps.com,
or contact Liberty Pumps at 1-800-543-2550.
Retain dated sales receipt for warranty.
Serial:
Mfg Date:
Install Date:
Installation Manual 4196000A
Copyright © Liberty Pumps, Inc. 2021 All rights reserved.
LCU-N Series Neutralizing Condensate Pumps
Models
LCU-N20ST
115V
Safety Switch
Tubing
LCU-N220ST
230V
Safety Switch
Tubing

2 | EN Copyright © Liberty Pumps, Inc. 2021 All rights reserved. 4196000A
Contents
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 | EN
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 | EN
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 | EN
Maintenance and Troubleshooting . . . . . . . . . . . . . . . 3 | EN
Safety Guidelines
Safety Precautions
Accidental contact with electrically live parts, items, fluid, or
water can cause serious injury or death.
Always disconnect the pump from power source before
attempting to service the pump. Fatal electrical shock could
occur.
The pump shall be plugged into a properly fused electrical
outlet with a ground fault circuit interrupter (GFCI) that
conforms to current National Electric Code (NEC) and all
applicable local codes. All wiring must be performed by
qualified personnel.
All electrical and safety practices shall be in accordance with
the National Electrical Code®, the Occupational Safety and
Health Administration, or applicable local codes and
ordinances.
Pump shall be properly grounded using its supplied
grounding conductor. Do not bypass grounding wires or
remove ground prong 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 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 handle or unplug pump with wet hands, when
standing on a wet/damp surface, or in water. Fatal electrical
shock could occur.
Do not lift or carry the pump by its power cord. This will
damage the power 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.).
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.
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.
For cord replacement: power cord must be of the same
length and type as originally installed on the Liberty Pumps
product. Use of incorrect cord may lead to exceeding the
electrical rating of the cord and could result in death, serious
injury, or other significant failure.
Do not use to pump flammable or explosive fluids such as
gasoline, fuel oil, kerosene, etc. Do not use in flammable
and/or explosive atmosphere. Sparks could ignite flammable
liquids.
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 be in compliance
with all applicable Federal, State, and Local codes and
ordinances.
Do not use this product with flammable, explosive, or
corrosive fluids. Do not use in a flammable and/or explosive
atmosphere as serious injury or death could result.
Do not allow any person who is unqualified 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.
Do not allow children to play with the pump.
Do not remove any tags or labels from the pump or its cord.
This product contains chemicals known to the State of
California to cause cancer and birth defects or other
reproductive harm. www.p65warnings.ca.gov.
This pump has been evaluated for use with water only.
This safety alert symbol is used in the manual
and on the pump to alert of potential risk for
serious injury or death.
This safety alert symbol identifies risk of
electric shock. It is accompanied with an
instruction intended to minimize potential risk
of electric shock.
This safety alert symbol identifies risk of fire.
It is accompanied with an instruction intended
to minimize potential risk of fire.
This safety alert symbol identifies risk of
serious injury or death. It is accompanied
with an instruction intended to minimize
potential risk of injury or death.
Warns of hazards which, if not avoided, will
result in serious injury or death.
Warns of hazards which, if not avoided, could
result in serious injury or death.
Warns of hazards which, if not avoided, could
result in minor or moderate injury.
Signals an important instruction related to the
pump. Failure to follow these instructions
could result in pump failure or property
damage.
RISK OF ELECTRIC SHOCK
RISK OF FIRE
RISK OF SERIOUS INJURY OR DEATH

4196000A Copyright © Liberty Pumps, Inc. 2021 All rights reserved. 3 | EN
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 150°F (65°C). Operating the
pump in fluid above this temperature can overheat the pump,
resulting in pump failure.
Do not use pump system with mud, sand, cement,
hydrocarbons, grease, or chemicals. Pump and system
components can be damaged from these items causing
product malfunction or failure. Additionally, flooding can
occur if these items jam the impeller or piping.
Do not allow pump to freeze.
General Information
Before Installation, read the following instructions carefully. Each
Liberty Pumps product is individually factory tested to assure
proper performance. By closely following these instructions,
potential operating problems should be eliminated, providing
years of trouble-free service.
Installation
A. Select a location that is level and below the condensate pan
drain. The unit may be mounted on a wall by using the
mounting tabs on the tank, which are 17.6” apart.
B. Connect the drain pan. Use vinyl tubing, PVC, or any other
suitable material. Be sure the tubing or pipe extends into the
inlet of the tank by at least 1".
Connect as follows:
STANDARD condensate (dehumidifiers, A/C, etc.) can be
connected to any of the three intake holes (1), (2), (3).
ACIDIC condensate (high-efficiency boilers and furnaces)
must be installed in inlet (4) or (5).
C. The discharge connection to the check valve may be made
with 3/8” vinyl tubing secured by a hose clamp (not included),
or the barb may be removed by sawing so that threaded
fittings may be attached. The thread is 1/4” NPT.
Connect discharge hose or pipe to the pump. Only
hand-tighten discharge fasteners. Over-tightening may cause
the discharge housing to crack and leak. Once the discharge
tubing has been extended to the required height it should be
slanted downward, if possible, to assist in drainage. Note: For
best results, do not extend discharge tubing beyond 17'
vertically.
D. The safety switch leads should be connected to a Class 2 low
voltage circuit (not to exceed 30 volts). Using this feature may
prevent damage from condensation overflowing if the
discharge becomes blocked or if the pump fails. The leads
may be connected in series with the low voltage thermostat
circuit so as to shut down the heating/air-conditioning
system if the water level in the pump tank rises beyond
normal, or they may be connected to an external alarm.
E. If necessary, the pump unit may be removed and rotated 180°
to make access to the plumbing inlet and discharge lines
easier. To rotate the pump:
1. Remove the clear neutralization chamber cover by
inserting a screwdriver in the slot and prying the tank
outward.
2. Remove the pump unit using the same process.
3. Rotate the pump, and snap it back into place.
4. Snap the neutralization chamber cover back in its initial
position.
F. When all mounting and water connections are secure,
connect the unit to an electrical supply. Disconnect electrical
power at fuse or circuit breaker box before making any
connections. The power cord must be connected to a
constant source of power (not a fan or other device that runs
intermittently) matching the voltage specified on the pump
nameplate.
If connecting a pump with a stripped wire cord end, power
connections must be made within a junction box or
appropriate enclosure and must comply with the NEC and
any applicable codes. Wiring is as follows: GREEN is ground,
BLACK is line, and WHITE is neutral (115V) or line2 (230V).
G. To ensure proper installation, energize power and test the
unit by adding water to the tank until the pump activates. Be
sure the water discharges properly. Finally, check the
connections for leakage and proper discharge pipe routing.
Maintenance and Troubleshooting
Accidental contact with electrically live parts, items, fluid, or
water can cause serious injury or death.
Always disconnect the pump from power source before
attempting to service the pump. Fatal electrical shock could
occur.
Maintenance
Pump models have sealed permanently lubricated bearings and
require no additional lubrication.
Quarterly
Check the outlet pH level using a pH strip or electronic pH meter.
The cartridge kit must be replaced the sooner of (1) annually or (2)
if the pH at the outlet drops below 5.0 (or the minimum level of
the local water authority). Use only Liberty Pumps replacement
cartridge kit #K001898. To replace the neutralization cartridge,
remove the neutralization chamber cover, exchange the cartridge
and replace cover.
Inspect the condensate pump tank to ensure it is free of
accumulated dirt or sludge. Do not use solvent cleaners. Clean
tank with mild soap and warm water only. Clean inlet and outlet
piping. Reassemble system and check for correct operation.
Pour enough water into the tank to activate the pump when not
normally in use.
As Needed
If unit is mounted in an unheated area that is exposed to
temperatures below freezing, the unit and lines must be drained
to prevent damage to the pump.
Standard condensate inlet (1), (2), or (3)
Acidic condensate inlet (4) or (5) only
TOP VIEW
1
2
5
3
4
RISK OF ELECTRIC SHOCK

4 | EN Copyright © Liberty Pumps, Inc. 2021 All rights reserved. 4196000A
Troubleshooting
No repair work shall be carried out during the warranty period
without prior factory approval. Liberty Pumps, Inc. assumes no
responsibility for damage or injury due to disassembly in the field.
Dismantling the pump voids the warranty. Servicing the pump
other than replacing cartridge kit, cleaning of pump inlet or
impeller should be referred to the factory or its authorized service
centers.
pH Level is Below 5.0
1. Replace neutralization cartridge using Liberty Pumps
replacement kit #K001898. See replacement steps above.
Pump Does Not Run or Hum
1. Line circuit breaker may be off, tripped or loose. Have a
certified electrician check fuse or breaker.
2. Water level in tank may be too low to activate switch. Add
more water to tank.
3. Plug on power cord may not be making contact in receptacle.
Check security and connection.
4. Float may be obstructed. Make sure float is free and not
interfering with the inlet pipe or any other obstruction.
5. Pump is installed on a non-level surface. Re-level pump.
6. Consult factory.
Pump Runs or Hums But Does Not Deliver Water
1. Check valve may be installed incorrectly or is defective. Check
that it is installed properly.
2. Examine discharge tubing for any kinks or blockages. Check
that intake tubing or pipe is not obstructed.
3. Discharge line may be blocked or frozen. Check to see if line
passes through cold areas or is blocked.
4. Inlet of pump is plugged or the impeller is jammed. Remove
the pump screen and clean inlet and impeller.
5. Vertical lift is beyond pump capability. Note:At the pump’s
maximum lift there will be no flow.
• maximum recommended lift: 17 ft
• maximum lift: 20 ft
Pump Runs and Removes Water But Does Not Shut Off
1. Float is stuck in the ON position. Check to make sure the float
is free to move up and down without obstruction.
2. Pump is installed on a non-level surface. Level the pump.
3. Switch is defective. Consult factory.
Pump Runs But Delivers Very Little Water
1. Vertical lift is approaching the pump’s maximum lift capability.
• maximum recommended lift: 17 ft
• maximum lift: 20 ft
2. Pump’s inlet is partially blocked. Check that inlet is clear of
debris.
3. Discharge line is partially blocked. Check line for blockage.
4. Check valve is not opening all the way. Check for defective or
blocked check valve.
Circuit Breaker Trips or Fuse Blows When Pump Starts
1. Fuse or breaker size is too small. Use a 15 Amp breaker.
2. Other major appliances are on the same circuit. Pump must be
on its own circuit.
3. Pump wiring is inadequate or is connected to an extension
cord. Have a certified electrician check for proper wiring.
4. Defective motor or switch. Consult factory.
Warranty
Liberty Pumps Wholesale Products Limited
Warranty
Liberty Pumps, Inc. warrants that Liberty Pumps wholesale
products are free from all factory defects in material and
workmanship for a period of three (3) years from the date of
purchase (excluding* batteries and “Commercial Series” models).
The date of purchase shall be determined by a dated sales receipt
noting the model and serial number of the pump. The dated sales
receipt must accompany the returned pump if the date of return is
more than three years from the date of manufacture noted on the
pump nameplate.
The manufacturer's sole obligation under this Warranty shall be
limited to the repair or replacement of any parts found by the
manufacturer to be defective, provided the part or assembly is
returned freight prepaid to the manufacturer or its authorized
service center, and provided that none of the following
warranty-voiding characteristics are evident:
The manufacturer shall not be liable under this Warranty if the
product has not been properly installed, operated, or maintained
per manufacturer instructions; if it has been disassembled,
modified, abused, or tampered with; if the electrical cord has been
cut, damaged, or spliced; if the pump discharge has been reduced
in size; if the pump has been used in water temperatures above
the advertised rating; 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, grease, or
hydrocarbons; if a non-submersible motor has been subjected to
moisture; or if the label bearing the model and serial 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
indirect, incidental, and consequential damages, including costs of
removal, reinstallation or transportation.
There is no other express warranty. All implied warranties,
including those of merchantability and fitness for a particular
purpose, are limited to three years from the date of purchase.
This Warranty contains the exclusive remedy of the purchaser,
and, where permitted, liability for consequential or incidental
damages under any and all warranties are excluded.
*Liberty Pumps, Inc. warrants StormCell®batteries for 1 year from
date of purchase, and warrants that pumps of its Commercial
Series 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
technical specifications and manuals.