Correction Of Cooling And Heating Capacity In Relation To Air Flow Rate Control (Fan Speed) - Mitsubishi Heavy Industries FDT40VF Technical Manual

1.9.2 Correction of cooling and heating capacity in relation to air flow rate control
(fan speed)
Fan speed P-Hi or Hi
Coefficient
Note (1) Models FDU and SRK models only.
1.9.3 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.
(1) Models 40-60
Piping length (m)
Cooling
Heating
(2) Models 71-140
Equivalent piping length (m)
Heating
71 model
100 model
125 model
140 model
Cooling
71 model
100 model
125 model
140 model
Equivalent piping length (m)
Heating
71 model
100 model
125 model
140 model
Cooling
71 model
100 model
125 model
140 model
Note (1) Calculate the equivalent length using the following formula.
However, install the piping so that the piping length is within +5 m of the limit length (actual length) for the respective types.
• Equivalent Length =Actual Length + (Equivalent bend length x number of bends in the piping.)
Equivalent length per bend. (Model 71-140 only)
Gas Pipe Diameter (mm)
Equivalent Bend Length
1.9.4 Height difference between the indoor unit and outdoor unit
When the outdoor unit is located below indoor units in cooling mode, or when the outdoor unit is located above indoor units in
heating mode, the correction coefficient mentioned in the below table should be subtracted from the value in the above table.
Height difference between the indoor unit and
outdoor unit in the vertical height difference
Adjustment coefficient
1
( )
Me Lo
1.00 0.97 0.95
7 10 15 20 25
1 0.99 0.975 0.965 0.95 0.935
1 1 1 1 1
(1)
7.5
1
1 0.996
1 0.991
φ15.88
1 0.986
1 0.985
1.008 1.006
1.016 1.013
φ19.05
1.022 1.018
1.026 1.021
(1)
60
0.983 0.983
ー
0.856 0.843
φ15.88
0.806 0.788
0.790 0.771
ー
0.959 0.955
φ19.05
0.935 0.929
0.928 0.920
φ 12.7 φ 15.88
0.20 0.25
30
1
10 15 20 25
1 1 1
1
0.989 0.982 0.975
0.978 0.964 0.951
0.968 0.950 0.932
0.966 0.946 0.927
1.003 1 0.997
1.007 1.002 0.996
1.009 1.001 0.992
1.011 1.002 0.992
65 70 75 80
0.978 0.978 0.973
ー ー ー ー
0.829 0.816 0.803
0.770 0.752 0.734
0.751 0.732 0.712
ー ー ー ー
0.951 0.948 0.944
0.924 0.919 0.912
0.913 0.907 0.900
φ 19.05
0.30
5m 10m 15m
0.99 0.98
201
- -
'10 • PAC-DB-136 '12 • PAC-T-173
30 35 40 45
0.998 0.998 0.993 0.993
0.968 0.961 0.954 0.947
0.937 0.924 0.910 0.897
0.878 0.860
0.914 0.896
0.907 0.888 0.868 0.849
0.994 0.991 0.988 0.985
0.991 0.985 0.980 0.974
0.984 0.967 0.958
0.975
0.983 0.973 0.964 0.954
85 90 95 100
0.973 0.968 0.968 0.963 0.963
ー
ー ー ー
0.789 0.776 0.762 0.749 0.736
0.716 0.698 0.680 0.662
0.693 0.673 0.654 0.634
ー ー ー ー
0.940 0.936 0.932 0.929 0.926
0.908 0.902 0.897 0.892 0.887
0.894 0.888 0.882 0.876 0.870
20m 25m
0.97 0.96 0.95
50 55
0.988 0.988
0.940 0.933
0.883 0.870
0.842 0.824
0.829 0.810
0.982 0.979
0.969 0.963
0.950 0.941
0.945 0.935
105
ー
0.644
0.615
ー
30m
0.94