Indoor Unit Drain Piping - LG AMNW Series Installation Manual

! CAUTION
• Install declination of the indoor unit is
very important for the drain of the duct
type air conditioner.
• Minimum thickness of the insulation for
the connecting pipe shall be 19mm(3/4
inch).
Front of view
The unit must be horizontal or declined to
the drain hose connected when finished
installation.
Ceiling
Drain Pump use
Indoor Unit Drain Piping (TYPE A )
- 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(1-1/4 inch).
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.
Pipe clamp
Indoor unit
Maintenance
drain port
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
Drainage
hole
!
The supplied flexible drain hose should not
be curved, neither screwed. The curved or
screwed hose may cause a leakage of
water.
Upward
HAND OVER
routing
not allowed
Teach the customer the operation and
maintenance procedures, using the operation
manual.
(air filter cleaning, temperature control, etc.)
INSTALLATION
Flexible drain hose
(accessory)
Drain
port
Drain hose connection
Use the clip (accessory)
Drain pan
CAUTION
Hanger
distance
Max 300mm
(11-4/5inch)
~49-1/5ft)
Metal
clamp
Flexible drain hose
Insulation
13
Main drain pipe
Glue the joint
Hanger Bracket
1~15m
(3-7/25
1/50~1/100 slope