Heat Insulation - LG MFL40910614 Installation Manual

Indoor Unit Drain Piping
Drain test
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• Connect the main drain pipe to the exterior and
leave it provisionally until the test comes to an
end.
• Feed water to the flexible drain hose and check
the piping for leakage.
• Be sure to check the drain pump for normal
operating and noise when electrical wiring is
complete.
• When the test is complete, connect the flexible
drain hose to the drain port on the indoor unit.
CAUTION : The supplied
flexible drain hose should not
be curved, neither screwed. The
curved or screwed hose may
cause a leakage of water.

Heat insulation

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
[over 120°C(248°F)].
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(73.4°F)], 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.
28 Air Conditioner
Feed water
Drain Pump
Drain pan
Indoor unit
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
Flexible drain hose Flexible drain hose
1/50~1/100
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)