Refrigerant Piping - Daikin FTN25JXV1 Technical Manual

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