Hisense HCHM-N04X Installation Manual page 24

(3) Selecting Piping Size
●
Select the size for the high/low pressure gas pipe,
low pressure gas pipe and liquid pipe according
to Table 5.1. The size depends on the indoor unit
total capacity connected downstream of the
Switch Box.
●
As for the BRANCH PIPE branch or header branch,
refer to the Technical Catalog for the Outdoor Unit.
● Perform the piping connection work for the Switch
Box as shown below.
(a) Outdoor Unit Side Field Piping Size
Connected
Indoor Unit Capacity: Q
kW
< 16.0
16.0 ≤ Q < 25.0
25.0 ≤ Q < 33.5
33.5 ≤ Q < 45.0
45.0 ≤ Q < 50.0
50.0 ≤ Q < 61.5
61.5 ≤ Q < 73.0
73.0 ≤ Q ≤ 85.0
NOTE:
Refer to "Position of Piping Connection" for the details of the piping connection for the
Switch Box. Use field-supplied reducer in case the field piping and Switch Box piping
connection does not match.
Table 5.1 Outdoor Unit Side Field Piping Size
Low Pressure
Gas Pipe (A)
mm (inch)
f15.88 (5/8)
f19.05 (3/4)
f22.2 (7/8)
f25.4 (1)
f28.58 (1-1/8)
f28.58 (1-1/8)
f28.58 (1-1/8)
f31.75 (1-1/4)
15
(a) Outdoor Unit Connecting Side
High/Low Pressure
Gas Pipe (B)
(Field-Supplied)
Low Pressure
Gas Pipe (A)
(Field-Supplied)
Liquid Pipe (C)
(Field-Supplied)
Gas Pipe (D)
(Field-Supplied)
Liquid Pipe (E)
(Field-Supplied)
(b) Indoor Unit Connecting Side
High/Low Pressure
Gas Pipe (B)
mm (inch)
f12.7 (1/2)
f15.88 (5/8)
f19.05 (3/4)
f22.2 (7/8)
f22.2 (7/8)
f22.2 (7/8)
f25.4 (1)
f28.58 (1-1/8)
Liquid Pipe (C)
mm (inch)
f9.52 (3/8)
f9.52 (3/8)
f9.52 (3/8)
f12.7 (1/2)
f12.7 (1/2)
f15.88 (5/8)
f15.88 (5/8)
f19.05 (3/4)