Indoor Unit Drain Piping - LG UM30F Installation Manual

Indoor Unit Drain Piping

[Ceiling Concealed Duct / Cassette]
- 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 32 mm.
Piping material: Polyvinyl chloride pipe VP-
25 and pipe fittings
- Be sure to execute heat insulation on the
drain piping.
- Install the drain raising pipes at a right
angle to the indoor unit and no more than
300 mm from the unit.
Pipe clamp
Indoor unit
Maintenance
drain port
300 mm or less
300 mm or less 300 mm or less 300 mm or less
Clamp metal(attached)
Heat insulation material: Polyethylene
foam with thickness more than 8 mm.
Upward
routing
not allowed
1 -1.5 m
Drain raising pipe
Drain hose(attached)
THE INDOOR UNIT INSTALLATION
Drain test
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 operating 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.
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.
Max 300 mm
Metal
clamp
Insulation
41
Flexible drain hose
(accessory)
Main drain pipe
Drain
Glue the joint
port
Drain hose connection
Use the clip (accessory)
Hanger
distance
Hanger Bracket
1~1.5 m
1/50~1/100 slope
Flexible drain hose