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): be sure not to pro-
vide 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
diometes Ø 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 strained.
A strained hose may cause leakage of water.
Flexible drain hose
• Connect the main drain pipe to the exterior and leave it pro-
(accessory)
visionally until the test comes to an end.
Main
drain pipe • Feed water to the flexible drain hose and check the piping
for leakage.
Drain
• Be sure to check the drain pump for normal operation and
port
Glue the joint
noise when electrical wiring is complete.
Drain hose connection
• When the test is complete, connect the flexible drain hose to
Use the clip (accessory)
the drain port on the indoor unit.
Pipe clamp
Indoor unit
Maintenance
drain port
Max 300mm
Metal
clamp
Insulation
Ceiling Concealed Duct (High Sensible)
Upward
routing
not allowed
1/50~1/100
MAX 700mm
Hanger
distance
Hanger Bracket
1~15m
1/50~1/100 slope
Flexible drain hose
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