Indoor Unit Drain Piping; Drain Test - LG MFL67500701 Manual

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.
Piping material: Polyvinyl chloride pipe VP-
25 and pipe fittings
- Be sure to execute heat insulation on the
drain piping.
Heat insulation material: Polyethylene
foam with thickness more than 8 mm.
1/50~1/100
MAX 800
Unit : mm
Hanging bar
1000~1500
300 or less
Unit : mm
Upward
routing
not allowed
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 flexi-
ble 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.
9
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
Flexible drain hose Flexible drain hose Flexible drain hose