LG ABNW18GM1AO Manual page 38

MULTI/SINGLE
Indoor unit
8. Installation
– Heat insulation material: Polyethylene foam with thickness more than 8 mm (5/16 inch).
Pipe clamp
Indoor unit
Maintenance
drain port
U-trap is not required for low static model in which the
external static pressure is below 50 pa(5mm Aq)
8.4.3 Method of Drainage test
 Drainage test of indoor unit
Use the following procedure to test the drainage.
1.In case that there are air filter, remove the air filter first.
2.Spray one or two glasses of water on the evaporator.
3.Check the drainage. Ensure that water flows through drain
hose of indoor unit without any leakage.
 Drainage test of indoor unit with drain pump
Use the following procedure to test the drain pump
operation.
1.Connect the main drain pipe to the exterior and leave it
provisionally until the test comes to an end.
2.Feed water to the flexible drain hose and check the piping
for leakage.
3.Be sure to check the drain pump for normal operating and
noise when electrical wiring is complete.
4.When the test is complete, connect the flexible drain hose
to the drain port on the indoor unit.
8.4.4 Connection of an auxiliary(flexible) drain hose
• To connect drain pipe to the drain socket on the indoor unit, an auxiliary flexible drain hose should be used.
auxiliary flexible drain hose allows that the drain pipe can be connected to the socket without breaking by
excessive strain.
Indoor Unit
Drain pan
Upward
routing
not allowed
Make sure to be closed.
※ According to type of indoor unit, external appearance could be different.
Auxiliary drain hose
Metal clamp
Thermal insulation(bend area)
Ceiling concealed duct - Middle static pressure
Thermal insulator
(Local supply)
Unit
Drainage conduit
※ According to type of indoor unit,
external appearance could be different.
Feed water
Drain pump
Drain pan
Thermal insulation (drain pipe area)
※ According to type of indoor unit,
external appearance could be different.
Drainage pipe
(Local supply)
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
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