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(b) Indoor Unit Side Field Piping Size
● When a branch is located downstream of the Switch Box
Connected Indoor Unit
Capacity: (Q)
kW
Q < 16.0
Q = 16.0
1. Field flarin work is required. Refer to Section 5.1 for the flaring work.
● When a branch is not located downstream of the Switch Box
Connected Indoor Unit
Capacity: (Q)
kW
1.2 ≤ Q ≤ 6.3
7.1 ≤ Q ≤ 16.0
Q = 22.4
Q = 28.0
1. Field flarin 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
Switch Box.
2. When the connected indoor unit capacity is 1.2~6.3kW 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.
Gas Pipe (D)
Liquid Pipe (E)
mm (inch)
mm (inch)
f15.88 (5/8)
1
f9.52 (3/8)
f19.05 (3/4)
f9.52 (3/8)
Gas Pipe (D)
Liquid Pipe (E)
inch (mm)
inch (mm)
f12.7 (1/2)
f6.35 (1/4)
1
f15.88 (5/8)
f9.52 (3/8)
f19.05 (3/4)
f9.52 (3/8)
f22.2 (7/8)
f9.52 (3/8)
NOTICE
18
1
1
Remarks
Use accessory pipe (1) on gas pipe side
and accessory pipe (2) on liquid pipe side to
decrease the pipe size.
1
Use accessory pipe (3) on gas pipe side to
1
increase the pipe size.
Use accessory pipe (4) on gas pipe side to
1
increase the pipe size.
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