Refrigerant Piping - Daikin FH15CBV1L Technical Manual

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 flow 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:
For R22
FL15EV1L
Indoor
FH15CBV1L
Model
FH15CBV1M
Outdoor
R15CV1
Maximum Length, m
Maximum Elevation, m
Maximum No. of Bends
Indoor
Model
Outdoor
R35DV1
Maximum Length, m
Maximum Elevation, m
Maximum No. of Bends
For R410A
Indoor
Model
Outdoor
Maximum Length, m
Maximum Elevation, m
Maximum No. of Bends
Indoor
Model
Outdoor
Maximum Length, m
Maximum Elevation, m
Maximum No. of Bends
Piping Sizes (Flare Connection Type)
Piping sizes are as follows:
R22
Model
Liquid (mm/in)
Suction (mm/in)
Model
Liquid (mm/in)
Suction (mm/in)
R410A
Model
Liquid (mm/in)
Suction (mm/in)
Model
Liquid (mm/in)
Suction (mm/in)
FL20EV1L
FH20CBV1L
FH20CBV1M
R18CV1 R20CV1
12 15 15
5 8 8
10 10 10
FH40CBV1L FH50CBV1L
FH40CBV1M FH50CBV1M
R40DY1 R50DY1
45 45 45
25 25 25
10 10 10
FLN15EV1L FLN20EV1L
FLN15EV1M FLN20EV1M
RN15FV1 RN20CV1
20 20
10 10
10 10
FLN50DV1L FHN62CV1L
FLN50DV1M FHN62CV1M
RN50DY1 RN61DY1
45 35
25 15
10 10
R15CV1 R18/20CV1
6.35 / 1/4 6.35 / 1/4
12.70 / 1/2 15.88 / 5/8
R28CV1 R30CV1 R35DV1/R40DY1
9.52 / 3/8 9.52 / 3/8
15.88 / 5/8 15.88 / 5/8
RN15FV1 RN20CV1
6.35 / 1/4 6.35 / 1/4
12.70 / 1/2 12.70 / 1/2
RN28CV1 RN35DV1
9.52 / 3/8 9.52 / 3/8
15.88 / 5/8 15.88 / 5/8
FL25EV1L
FH25CBV1L
FH25CBV1M
R20CV1 R25CV1
15 15
8 8
10 10
FH61CBV1L
FH61CBV1M
R60DY1
35
15
10
FLN25EV1L FLN30EV1L
FLN25EV1M FLN30EV1M
RN25CV1 RN28CV1
20 25
10 8
10 10
R25CV1
9.52 / 3/8
15.88 / 5/8
R50DY1
9.52 / 3/8 9.52 / 3/8
19.05 / 3/4 19.05 / 3/4
RN25CV1
6.35 / 1/4
15.88 / 5/8
RN40DY1 RN50DY1
9.52 / 3/8 9.52 / 3/8
15.88 / 5/8 15.88 / 5/8
FH30CBV1L
FH30CBV1M
R28CV1 R30CV1
15 25
8 10
10 10
FLN40DV1L
FLN40DV1M
RN35DV1 RN40DY1
45 45
25 25
10 10
R61DY1
12.7 / 1/2
19.05 / 3/4
RN61DY1
9.52 / 3/8
19.05 / 3/4
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