Hisense HCHS-N06X Installation Manual page 24

● Piping Work for Switch Box
Refrigerant piping size depends on the combinations with the outdoor unit. Refer to the installation and
maintenance manual for the outdoor unit. Perform piping work for the Switch Box according to the
following figure.
Outdoor Unit
L3
BRANCH PIPE
or Water Module
Maximum Piping Length between BRANCH PIPE of 1st
Branch and Terminal Indoor Unit
Maximum Piping Length between Each BRANCH
Piping
PIPE and Each Indoor Unit
Length
In Case there is Branch after Switch Box,
Total Piping Length from Switch Box to
Each Connected Indoor Unit per Branch
In Case there is Branch after Switch Box ,
Height Difference between Indoor Units Connected
to Same Connection Port of Switch Box
Height
Difference
Height Difference between Switch Boxes
Height Difference between Switch Box and Indoor Unit
NOTES:
1. When the piping length from the first branch to the terminal indoor unit exceeds 40m (131 ft), there are
restrictions. Refer to the installation and maintenance manual for the outdoor unit.
2. If the piping length (L3) between each BRANCH PIPE and indoor unit is considerably longer than other indoor
unit, refrigerant may not flow well, and may lessen the unit's performance compared to other
models. (Recommended Piping Length: Within 15m (49 ft))
3. Recommended height difference between Switch Box and indoor unit is within 15m (49 ft).
If the height difference exceed this value, it may cause a decrease of operating performance.
4. Each Water Module must occupy one branch of Switch Box exclusively.
: 3 Pipes (High/Low Pressure Gas Pipe, Low Pressure Gas Pipe and Liquid Pipe)
: 2 Pipes (Gas Pipe and Liquid Pipe)
Switch Box
H5
Switch Box
H5
Indoor Unit
Indoor Unit
or Water Module
Item
L2
Switch Box
H4
L3
Indoor Unit
a+b+c+d+e
12
d
e
Indoor Unit
Indoor Unit
Allowable Piping
Mark
Length
L2 ≤ 90m (295 ft)
L3 ≤ 40m (131 ft)
≤ 40m (131 ft)
H3 < 4m (13 ft)
H4 < 15m (49 ft)
H5 Refer to NOTE 3.
H5
H3
1
2