Liberty Pumps LCU-Serie Manual De Instalación página 3

the pump housing to crack. Once the discharge tubing has been extended to the required height it should
be slanted downward, if possible, to assist in drainage.
discharge tubing beyond 12' vertically for the LCU-15 and 17' for the LCU-20S, LCU220S,
LCU-SP20S, or LCU-SP220S (Refer to performance chart).
C. The safety switch leads (all Models except LCU-15) 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.
D. To provide maximum mounting positions the tank cover may be removed and rotated 180° so that the
check valve will be on the opposite side of the unit. To remove the lid from the tank, insert a screwdriver in
the slot and pry the tank outward, while lifting the lid. After removing and rotating, be sure the lid snaps
back into place firmly.
E. When all mounting and water connections are secure, connect the unit to an electrical supply.
F.
To ensure proper installation, 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.
3. Troubleshooting
Always disconnect the pump from its power source before handling. This guide is designed to
help identify reasons for potential operating problems. It is not a service guide. Dismantling the pump voids the
warranty. Servicing the pump other than simple cleaning of pump inlet or impeller should be referred to the factory
or its authorized service centers. NOTE: The manufacturer assumes no responsibility for damage or injury due to
disassembly in the field.
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.
6.
Consult factory.
PUMP RUNS OR HUMS BUT DOES NOT DELIVER WATER
1. Check valve may be installed incorrectly or is defective. Check to make sure it's installed properly.
2. Examine discharge tubing for any kinks or blockages. Also, be certain 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.
Vertical lift is beyond pumps capability. See chart below for your pump's maximum lift capability.
5.
Inlet of pump is plugged or the impeller is jammed. Remove the pump screen and clean inlet and impeller.
NOTE: At the pump's maximum lift there will be no flow.
MODEL
LCU-15, -15S
LCU-20S
LCU220S
LCU-SP20, -SP220S
MAX. RECOMMENDED LIFT
12'
17'
17'
17'
©Copyright 2013 Liberty Pumps Inc. All rights reserved
NOTE: For best results, do not extend
MAX. LIFT
15'
20'
20'
20'
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