LG CRNN Series, Installation Manual

Page: 69 / 86

Installation of Ceiling Concealed Duct Type Indoor Unit
69
Installation of Ceiling Concealed Duct Type Indoor Unit
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.
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.
• 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. Install declination of the indoor unit is very important for the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 5mm.
• The unit must be horizontal or declined to the drain hose connected when finished
installation.
CORRECT
CORRECT
INCORRECT
INCORRECT
• Upward routing not
allowed