LG ABNW18GM1 Series, Installation Manual

Page: 9 / 28

INSTALLATION OF INDOOR
ENGLISH
9
• 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 5 mm.
Front of view
• The unit must be declined to the drain hose connected when finished installation.
Caution for gradient of unit and drain piping
Lay the drain hose with a downward inclination so water will drain out.
CAUTION
!
Drainage hole
Drainage hole
CORRECT INCORRECT
1/100~1/50
Ceiling
Drainage hole
U-Trap
B
C
A
≥
70 mm
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10 mmAq
A
≥ 70 mm
B ≥ 40 mm
C ≥ 20 mm
A
Make sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)
• Always lay the drain with downward
inclination (1/100 to 1/50).
Prevent any upward flow or reverse flow
in any par t.
• 10 mm or thicker formed thermal insulator
shall always be provided for the drain
pipe.
• Install the P-Trap (or U-Trap) to prevent
a water leakage caused by the blocking
of intake air filter.
Applied U-Trap Dimension
CORRECT
INCORRECT
• Upward routing not
allowed