14
Application Information
4) Refrigerant Piping
Maximum Piping Length and Maximum Number of Bends
When the pipe length becomes too long, both the capacity and reliability drop. As the number of bends increases,
system piping resistance to the refrigerant
fl
ow increases, thus lowering the cooling capacity, and as the result
the compressor may become defective. Always choose the shortest path and follow the recommendation as
tabulated below:
Model
Indoor
FF(Y)10CXV1
FF(Y)15CXV1
FF(Y)20CXV1
Outdoor
R(Y)10CXV1
R(Y)15CXV1
R(Y)18/20CXV1
Max. Length, m
12
12
15
Max. Elevation, m
5
5
8
Max. No. of Bends
10
10
10
Model
Indoor
FH(Y)C20EXV1
FH(Y)C25EXV1
FH(Y)C28EXV1
Outdoor
R(Y)20CXV1
R(Y)25CXV1
R(Y)28CXV1
Max. Length, m
15
15
15
Max. Elevation, m
8
8
8
Max. No. of Bends
10
10
10
Model
Indoor
FH(Y)C40EXV1
FH(Y)C50EXV1
Outdoor
R(Y)35/40DXV1
R(Y)40DXY1
R(Y)50DXY1
Max. Length, m
45
45
Max. Elevation, m
25
25
Max. No. of Bends
10
10
Piping sizes (
fl
are connection type) are as follows:
Model
R(Y)10CXV1
R(Y)15CXV1
R(Y)18/20CXV1
R(Y)20CXV1
Liquid, mm / in
6.35 / 1/4
6.35 / 1/4
6.35 / 1/4
6.35 / 1/4
Suction, mm / in
9.52 / 3/8
12.70 / 1/2
15.88 / 5/8
15.88 / 5/8
Model
R(Y)25CXV1
R(Y)28CXV1
R(Y)35DXV1
Liquid, mm / in
9.52 / 3/8
9.52 / 3/8
9.52 / 3/8
Suction, mm / in
15.88 / 5/8
15.88 / 5/8
19.05 / 3/4
Model
R(Y)40DXV1
R(Y)40DXY1
R(Y)50DXY1
Liquid, mm / in
9.52 / 3/8
Suction, mm / in
19.05 / 3/4
DAIKIN_FF_FHC.indb 14
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Summary of Contents for FF-C
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Page 56: ...53 Wiring Diagram Indoor Unit Model FF20CXV1 Outdoor Unit Model R20CXV1...
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