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

Indoor unit
10. Installation
1. Install declination of the indoor unit is very important for the drain of the duct type air condition-
er.
2. Minimum thickness of the insulation for the connecting pipe shall be 19mm.
• The unit must be horizontal or declined to the drain hose connected when finished
installation.
Drainage hole

10.6 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 VP-25 and
pipe fittings
• Be sure to install heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thick-
ness 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
24 _
Ceiling Concealed Duct_Built in (Low Static)
CAUTION
Front of view
Ceiling
Drain Pump use
Flexible drain hose
Main
drain pipe
Drain
port
Glue the joint
Drain hose connection
Use the clip
Pipe clamp
Indoor unit
Maintenance
drain port
• 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 oper-
ating 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.
Upward
routing
not allowed
1/50~1/100
MAX 700mm