
4.Connecting pipe installation
11
Connecting mode 2
第一分歧管
Equivalent length to the nearest branch
Equivalent length to the farthest
piping of the indoor unit
From the first branch farthest
piping equivalent length
1st branch
Height
dif
ference
between
indoor
and
outdoor
units
Indoor unit
Height
dif
ference
between
indoor
units
Allowable value
Piping part
≤
120m
L1+L2+L3+L4+L5+a+b+c+d+e+f
Actual length
≤
60m
Equivalent
length
≤
70m
≤
20m
L2+L3+L4+L5 +f (Connecting mode 1)
or L3 +L5 +f (Connecting mode 2)
≤
15m
a, b, c, d, e, f
Outdoor upper
≤
30m
─
Outdoor lower
≤
20m
─
≤
8m
─
Height difference
Piping length
Total piping length
Farthest piping
length L
Equivalent length to the farthest
piping of the first branch
L1+L2+L3+L4+L5 +f (Connecting mode 1)
or L1+ L3 +L5 +f (Connecting mode 2)
Equivalent length to the nearest branch
Height difference between indoor units
Height difference between
indoor and outdoor units
26.0kW
28.0kW
33.5kW
Allowable value
Piping part
≤
100m
L1+L2+L3+L4+L5+a+b+c+d+e+f
Actual length
≤
60m
Equivalent
length
≤
70m
≤
20m
L2+L3+L4+L5 +f (Connecting mode 1)
or L3 +L5 +f (Connecting mode 2)
≤
15m
a, b, c, d, e, f
Outdoor upper
≤
30m
─
Outdoor lower
≤
20m
─
≤
8m
─
Height difference
Piping length
Total piping length
Farthest piping
length L
Equivalent length to the farthest
piping of the first branch
L1+L2+L3+L4+L5 +f (Connecting mode 1)
or L1+ L3 +L5 +f (Connecting mode 2)
Equivalent length to the nearest branch
Height difference between indoor units
Height difference between
indoor and outdoor units
12.5kW
14.0kW
16.0kW
18.0kW
20.0kW
22.4kW
V.2