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

Indoor unit
10. Installation

10.5 Indoor Unit Drain Piping

• Drain piping must have down-slope (1/50 to 1/100): Make 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 inner
diameter Ø 25mm and pipe fittings
• Make 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 strained.
A strained hose may cause leakage of water.
20 _
Ceiling Cassette 2-way
• Connect the main drain pipe to the exterior and leave it
Flexible drain hose
(accessory)
• Feed water to the flexible drain hose and check the pip-
Main
drain pipe
• Make sure to check the drain pump for normal operating
Drain
port Glue the joint
• When the test is complete, connect the flexible drain
Drain hose connection
Use the clip (accessory)
Pipe clamp
Indoor unit
Maintenance
drain port
provisionally until the test comes to an end.
ing for leakage.
and noise when electrical wiring is complete.
hose to the drain port on the indoor unit.
Upward
routing
not allowed
1/50~1/100
MAX 700mm
Hanger
distance
Hanger Bracket
Max 300mm
1~15m
1/50~1/100 slope
Metal
clamp
Flexible drain hose
Insulation