LG MFL67500701, Manual

Page: 9 / 19

9
THE INDOOR UNIT INSTALLATION
ENGLISH
Indoor Unit 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.
- Be sure to execute heat insulation on the
drain piping.
Piping material: Polyvinyl chloride pipe VP-
25 and pipe fittings
Upward
routing
not allowed
1/50~1/100
MAX 800
1000~1500
3 00 or less
Hanging bar
Unit : mm
Unit : mm
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 flexi-
ble drain hose to the drain port on the indoor
unit.
Feed water
Drain Pump
Drain pan
Flexible drain hose
(accessory)
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip (accessory)
Flexible drain hose Flexible drain hose Flexible drain hose
CAUTION
The supplied flexible drain hose should
not be curved, neither screwed. The
curved or screwed hose may cause a
leakage of water.
!
Heat insulation material: Polyethylene
foam with thickness more than 8 mm.