LG ARNU48GBRZ4, Технический каталог изделия

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10. Installation
24 _
Ceiling Concealed Duct_Built in (Low Static)
Indoor unit
Indoor Units
CAUTION
Ceiling
Drain Pump use
Drainage hole
Front of view
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.
• 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.
• Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe VP-25 and
pipe fittings
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• 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.
Heat insulation material: Polyethylene foam with thick-
ness more than 8 mm.
Drain test
Feed water
Drain Pump
Drain pan
Flexible drain hose
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip
Upward
routing
not allowed
Pipe clamp
1/50~1/100
MAX 700mm
Flexible drain hose
Maintenance
drain port
Indoor unit
10.6 Drain Piping