4.3 Limitation values on pipe installation
Item
Unit Description
Standard Maximum
A,B,C liquid pipe
mm Size of the liquid side connection pipe
φ
6.35
/
A,B,C Gas pipe
mm Size of the gas side connection pipe
φ
9.52
/
L1 (one way)
m
Max.piping length between IU and OU of the way
≤
10
≤
25
L2 (one way)
m
Max.piping length between IU and OU of the way
≤
10
≤
25
L3 (one way)
m
Max.piping length between IU and OU of the way
≤
10
≤
25
L1+L2+L3
m
Total liquid piping length
≤
30
≤
50
m
Drop between every two indoor units when the location of
the outdoor unit is among indoor units
≤
1
≤
15
m
Drop between every two indoor units when the location of
the outdoor unit is at one side of indoor units
≤
1
≤
7.5
H+
m
Drop between the outdoor unit and the indoor unit
≤
5
≤
15
m
Drop between the outdoor unit and the indoor unit when the
location of outdoor unit is among the indoor units
≤
5
≤
7.5
m
Drop between the outdoor unit and the indoor unit when the
location of outdoor unit is at one side of indoor units
≤
5
≤
15
h
H-
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YJU3YH019BAR
R
A-X
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