Hisense HCHM-N04X, Installation Manual, Page: 27 / 37

(b) Indoor Unit Side Field Piping Size
●
When a branch is located downstream of the
Switch Box
●
When a branch is not located downstream of the
Switch 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 flarin work is required. Refer to Section 5.1 for the flarin g work.
Connected Indoor Unit
Capacity: (Q)
Gas Pipe (D) Liquid Pipe (E)
Remarks
kW inch (mm) inch (mm)
1.2 ≤ 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 flarin work is required. Refer to Section 5.1 for the flarin g work.
NOTES:
1. When connecting the Gas Pipe (D) and Liquid Pipe (E), reuse the flar e 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.
NOTICE
18