Indoor Unit Drain Piping - LG MULTI V ARNU07GTUA4 Engineering Product Data Book

Indoor unit
10. Installation

10.6 Indoor Unit Drain Piping

• Drain piping must have down-slope (1/50 to 1/100): be sure
not to provide up-and-down slope to prevent reversal flow.
• During drain piping connection, be careful not to exert extra
force on the drain port on the indoor unit.
• The outside diameter of the drain connection on the indoor
unit is 32mm.
Piping material: Polyvinyl chloride pipe 25mm
and pipe fittings
• Be sure to install heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with
thickness more than 8 mm.
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
CAUTION
The supplied flexible drain hose should not be curved,
neither screwed. The curved or screwed hose may
cause a leakage of water.
Pipe clamp
Indoor unit
Maintenance
drain port
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
• 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 flexi-
ble drain hose to the drain port on the indoor
unit.
Max 300mm
Metal
clamp
Flexible drain hose
Insulation
Ceiling Cassette 1-Way
Upward
routing
not allowed
1/50~1/100
Max 700mm
Hanger
distance
Hanger bracket
1~15m
1/50~1/100 slope
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