Indoor Unit Drain Piping; Drain Test - LG LDN127HV4 Installation Manual

THE INDOOR UNIT INSTALLATION
12

Indoor Unit Drain Piping

Pipe clamp
Indoor unit
Maintenance
drain port
- 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.
- Install the drain raising pipes at a right
angle to the indoor unit and no more than
300mm from the unit.
Heat insulation material: Polyethylene foam
with thickness more than 8 mm.

Drain test

Feed water
Drain Pump
Drain pan
Upward
routing
not allowed
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
- 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.
- When the test is complete, connect the flexi-
ble drain hose to the drain port on the indoor
unit.
1 Remove the Air Filter.
2 Check the drainage.
- Spray one or two glasses of water upon
the evaporator.
- Ensure that water flows drain hose of
indoor unit without any leakage.