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Limitation of piping branch
If the length of the pipe from the first branch pipe to the farthest indoor unit is more than 40m, follow
the following conditions during installation:
Example 1:
In case of that the piping length L2 from 1st branch pipe to the farthest indoor unit exceeds 40m,
perform the construction following the conditions as below:
(1) When the piping distance L2 exceeds 40m, the b, c or g, h and the piping diameters of the gas
and liquid side are all required to be enlarged by one gauge through the adapter. If you increase
the diameter and a diameter is less than b and g, then increase a diameter to be as the same as
b and g.
(2) Piping length difference between piping from farthest indoor unit to the first branch and piping from
nearest indoor unit to the first branch pipe should not be less than 40m.
(g + h + j) - (b + d)≤ 40m.
b
a
c
e
d
f
i
j
k
h
g
L2
L2
The length of the piping from the end of first branch pipe to the
end indoor unit is more than 40 meters and less than 90m
First branch
multi kit
The nearest indoor unit
from the first branch
The farthest indoor unit
from the first branch
Terminal indoor unit
Terminal indoor unit
Example 2:
From the first branch of the main sub-manifold to
the end ind
oor unit piping length of more than 40m
and less than 90m:
(1) When the piping distance L2 exceeds 40m, the pipe diameter of
the b, d, f gas a
nd the liquid side
is enlarged by one gauge through adaptor. By increasing the diameter, if a diameter is less than b,
then increase a to match with b.
L2
b
a
d
c
e
g
i
f
h
The piping length between the first level branch pipe
to the end indoor unit exceed 40m and less than 90m
First branch
multi kit
The nearest indoor unit
from the first branch
The farthest indoor unit
from the first branch
Terminal indoor unit
