P5417025-rev.1
17
(b) Indoor Unit Side Field Piping Size
● When a branch is located downstream of the CH-Box
● When a branch is not located downstream of the CH-Box
Connected Indoor Unit
Capacity: (Q)
Gas Pipe (D)
Liquid Pipe (E)
kW
mm (inch)
mm (inch)
Q < 16.0
f
15.88
(5/8)
1
f
9.52
(3/8)
1
Q = 16.0
f
19.05
(3/4)
f
9.52
(3/8)
1
1. Field flaring work is required. Refer to Section 5.1 for the flaring work.
Connected Indoor Unit
Capacity: (Q)
Gas Pipe (D)
Liquid Pipe (E)
Remarks
kW
mm (inch)
mm (inch)
Q ≤ 6.3
f
12.7
(1/2)
f
6.35 (1/4)
Use accessory pipe (1) on gas pipe side
and accessory pipe (2) on liquid pipe side to
decrease the pipe size.
7.1 ≤ Q ≤ 16.0
f
15.88
(5/8)
1
f
9.52
(3/8)
1
-
Q = 22.4
f
19.05
(3/4)
f
9.52
(3/8)
1
Use accessory pipe (3) on gas pipe side to
increase the pipe size.
Q = 28.0
f
22.2
(7/8)
f
9.52
(3/8)
1
Use accessory pipe (4) on gas pipe side to
increase the pipe size.
1. Field flaring work is required. Refer to Section 5.1 for the flaring work.
NOTES:
1. When connecting the Gas Pipe (D) and Liquid Pipe (E), reuse the flare nut attached to the
CH-Box.
2. When the connected indoor unit capacity is 6.3kW or less and the piping length exceeds 15m (49ft.),
use 9.52mm (3/8 inch) for the liquid pipe.
In case the piping connection is not used for the indoor unit side piping connection, it must be
sealed using the closed flare nut originally attached. These flare nuts have been tightened by
torque specifications shown below before shipping. Ensure that they are sealed completely.
NOTICE
Summary of Contents for CH-AP04MSSX
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