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Installation Manual 21
Installation
ENGLISH
Drainage hole
U-Trap
B
C
A ≥
2-3/4 inch
(70 mm)
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(in.wc)
Ex) External Pressure
= 0.4 in.wc(10 mmAq)
A ≥
2-9/16 inch(70 mm)
B ≥
1-7/12 inch(40 mm)
C ≥
19/24 inch(20 mm)
A
Make sure to be closed.
Unit
Drainage pipe
(Field supply)
Thermal insulator
(Field supply)
Applied U-Trap Dimension
CORRECT
• Install the U-Trap to prevent
a water leakage caused by the blocking
of intake air filter.
Upflow Drain Horizontal-left Drain
INCORRECT
3/4 inch(19.05 mm)
connector
Air filter cover
Main drain along with suitable trap.
( Field supplied trap with sufficient
depth can be used. P-traps of standard
size are not sufficient. Refer the figure
for recommended condensate trap.)
Supplementary drain
with proper trap. (field
supplied kit can be used)
Horizontal-left Horizontal-left
Drain KnockoutDrain Knockout
Horizontal-left
Drain Knockout
CAUTION
The supplied flexible drain hose should not be strained.
A strained hose may cause leakage of water.
!
GRADIENT OF UNIT AND DRAIN PIPING
• Alway lay the drain with downward inclination(1/50 to 1/100).
Prevent any upward flow or reverse flow in any part.
• 5/24 inch(5 mm) or thicker formed thermal insulator shall always be provided for the drain pipe.
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