LG UU21WH Installation Manual page 9

Drain test
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
Feed water
Drain Pump
Drain pan
Heat insulation
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
(over 120°C).
2. Precautions in high humidity
circumstance:
This air conditioner has been tested
according to the "KS Standard Conditions
with Mist" and confirmed that there is not
any default. However, if it is operated for a
long time in high humid atmosphere (dew
point temperature: more than 23°C), water
drops are liable to fall. In this case, add
heat insulation material according to the
following procedure:
• Heat insulation material to be prepared...
Adiabatic glass wool with thickness 10 to
20mm.
• Stick glass wool on all air conditioners that
are located in ceiling atmosphere.
• Connect the main drain pipe to the exterior and leave
Flexible drain hose
(accessory)
• Feed water to the flexible drain hose and check the
Main
drain pipe
• Be sure to check the drain pump for normal
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory) • When the test is complete, connect the flexible drain
it provisionally until the test comes to an end.
piping for leakage.
operating and noise when electrical wiring is
complete.
hose to the drain port on the indoor unit.
Indoor unit
Indoor Unit Drain Piping
Flexible drain hose
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)
Installation Manual 9