7
Long pipe and high drop
1. Allowable pipe length and height difference
Length of the longest piping after the
first branch piping L
g
L
4
h
i
Length of the longest piping L
L
2
L
1
h
10m
f
L
3
a
b
c
d
e
Outdoor unit
First branch piping
Indoor unit
——
——
——
Piping part
100m
70m
30m
30m
20m
10m
Permissible value
Longest piping L
Piping length of indoor unit which is furthest to the
first branch piping L
Drop height between indoor and
outdoor unit H
Drop height between indoor units h
Total length of piping (actual length)
Actual length
Up outdoor
Under outdoor
B-YCV150.YCV180: Maximal length and drop height permissible of refrigerant piping
L2+L3+L4+e
L1+L2+L3+L4+a
+b+c+d+e
L1+L2+L3+L4+e
——
——
——
Piping part
50m
35m
15m
30m
20m
10m
Permissible value
Longest piping L
Piping length of indoor unit which is furthest to the
first branch piping L
Drop height between indoor and
outdoor unit H
Drop height between indoor units h
Total length of piping (actual length)
Actual length
Up outdoor
Under outdoor
YCV080: Maximal length and drop height permissible of refrigerant piping
L2+L3+L4+e
L1+L2+L3+L4+a
+b+c+d+e
L1+L2+L3+L4+e
Installation procedure
