Gas Piping Length (M) - Mitsubishi Heavy Industries FDCA Series Technical Manual

Model FDKN type
Model
Item
Hi
Air flow Me
Lo
Model FDUR type
Model
Item
Hi
Air flow
Lo
(2) Correction of cooling and heating capacity in relation to air flow rate control (fan speed)
Coefficient: 1.00 at High, 0.95 at Low
(3) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating capacity in relation to the one way equivalent piping length between the indoor
and outdoor units.
Models FDCA301~601
(1)
Equivalent piping length m
Heating
FDCA301 model
FDCA401 model
Cooling
FDCA501 model
FDCA601 model
Models FDCA801, 1001
Equivalent piping length (1) m
Heating
FDCA801 model
Cooling
FDCA1001 model
Note (1) Calculate the equivalent length using the following formula.
However, install the piping so that the equivalent length is within +5 m of the piping distance limit )actual length) for each respective piping system.
• Equivalent Length = Actual Length + (equivalent length of bends x number of bends in the piping)
Equivalent Length for 1 Bend
Gas Pipe Diameter (mm)
Bend Equivalent Length
FDKNA151, 201 FDKNA251
0.056
0.041
0.028
FDURA201 FDURA251
0.111
0.083
7.5 10 15
1 0.995 0.992
1 0.996 0.989
1 0.995 0.986
1 0.994 0.982
1 0.993 0.978
7.5 10 15 20
1 0.998 0.992 0.986 0.980 0.974 0.968 0.962 0.956 0.951 0.945 0.939 0.933 0.927 0.921
1 0.997 0.984 0.972 0.960 0.949 0.937 0.926 0.916 0.906 0.896 0.886 0.877 0.869 0.860
1 0.998 0.995 0.991 0.988 0.984 0.981 0.977 0.974 0.970 0.967 0.963 0.960 0.956 0.953
1.05
1.00
0.95
0.90
0.85
0.80
0.75
0 20

Gas piping length (m)

ø9.52 ø12.7
0.15 0.20
FDKNA301
0.063 0.043
0.048 0.034
0.034 0.025
FDURA301
0.053 0.069
0.037 0.049
20 25 30
0.990 0.987 0.984
0.982 0.974 0.967
0.976 0.967 0.957
0.969 0.957 0.945
0.963 0.948 0.933
25 30 35 40
Cooling
Heating
(801)
Cooling
(1001)
40 60
ø15.88 ø19.05
0.25 0.30
48
- -
FDURA401
0.106
0.079
35 40 45
0.981 0.978 0.975
0.959 0.952 0.945
0.948 0.938 0.929
0.933 0.921 0.908
0.918 0.903 0.888
45 50 55 60
80
ø25.4
0.40
FDURA501
0.050
0.034
50 55
0.972 0.970
0.937 0.930
0.919 0.910
0.896 0.884
0.873 0.858
65 70 75