LG ABNH186HLAC, Service Manual

Page: 69 / 175

Service Manual 73
Ceiling Concealed Duct
Ceiling
CAUTION
1~3mm
Drainage hole
Drainage hole
U-Trap
B
C
A
≥
70mm
B
≥
2C
C
≥
2 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10mmAq
A
≥
70mm
B
≥
40mm
C
≥
20mm
A
Make sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)
Drainage hole
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
Lay the drain hose with a downware
inclination so water will drain out.
MAX 700mm
Drain Pipe
Drain Pump
1/50~1/100 1/50~1/100
Front of view
• Alway lay the drain with downward inclination
(1/50 to 1/100).
Prevent any upward flow or reverse flow in any
part.
• 5mm or thicker formed thermal insulator shall
always be provided for the drain pipe.
CORRECT
• Install the P-Trap (or U-Trap) to prevent
a water leakage caused by the blocking
of intake air filter.
Applied U-Trap Dimension
1. Decline Installation of indoor unit is very important for the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe should be 5mm.
• The unit must be or declined to wards drain hose while installation.
CORRECT
INCORRECT
INCORRECT