10
Application Information
Refrigerant Piping
Piping Length and Elevation
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:
Outdoor Unit
Indoor Unit
LE
Cooling Only Model
Model
Indoor
FTN25JXV1 FTN25JXV1 FTN35JXV1 FTN35JXV1
Outdoor
RN25CJXV1 RN25FXV1 RN35CJXV1 RN35FXV1
Min.Allowable Length (L), m
3
Max.Allowable Length (L), m
20 25 20 25
Max.Allowable Elevation (E), m
10 15 10 15
Gas Pipe Size, mm/(in)
9.52 / (3/8") 9.52 / (3/8") 12.70 / (1/2") 12.70 / (1/2")
Liquid Pipe Size, mm/(in)
6.35 / (1/4") 6.35 / (1/4") 6.35 / (1/4") 6.35 / (1/4")
Model
Indoor
FTN50JXV1 FTN60JXV1 FTN80FXV1
Outdoor
RN50CJXV1 RN60CJXV1 RR71CXV1 RR71CXY1
Min.Allowable Length (L), m
3
Max.Allowable Length (L), m
20 20 15 15
Max.Allowable Elevation (E), m
15 15 8 8
Gas Pipe Size, mm/(in)
12.70 / (1/2") 15.88 / (5/8") 15.88 / (5/8") 15.88 / (5/8")
Liquid Pipe Size, mm/(in)
6.35 / (1/4") 6.35 / (1/4") 9.52 / (3/8") 9.52 / (3/8")
Heatpump Model
Model
Indoor
FTYN20JXV1 FTYN25JXV1 FTYN35JXV1 FTYN35JXV1
Outdoor
RYN20CGXV1 RYN25CJXV1 RYN35CJXV1 RYN35CJHXV1
Min.Allowable Length (L), m
3
Max.Allowable Length (L), m
12 20 20 20
Max.Allowable Elevation (E), m
5101010
Gas Pipe Size, mm/(in)
9.52 / (3/8") 9.52 / (3/8")
12.70 / (1/2") 12.70 / (1/2")
Liquid Pipe Size, mm/(in)
6.35 / (1/4") 6.35 / (1/4") 6.35 / (1/4") 6.35 / (1/4")
Model
Indoor
FTYN50JXV1 FTYN60JXV1
FTYN80FXV1
Outdoor
RYN50CJXV1 RYN60CJXV1
RQ71CXV1 RQ71CXY1
Min.Allowable Length (L), m
3
Max.Allowable Length (L), m
20 20 15 15
Max.Allowable Elevation (E), m
15 15 8 8
Gas Pipe Size, mm/(in)
12.70 / (1/2") 15.88 / (5/8") 15.88 / (5/8") 15.88 / (5/8")
Liquid Pipe Size, mm/(in)
6.35 / (1/4") 6.35 / (1/4") 9.52 / (3/8") 9.52 / (3/8")
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