'10 • PAC-DB-136
1.9.2 Correction of cooling and heating capacity in relation to air flow rate control
(fan speed)
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.
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)
(1) Models 40-60
(2) Models 71-140
0.20 0.25 0.30
Gas Pipe Diameter (mm)
Equivalent Bend Length
φ
19.05
φ
15.88
φ
12.7
1.00 0.97 0.95
Fan speed
Coefficient
LoMeP-Hi or Hi
(
1
)
55
0.988
0.933
0.870
0.824
0.810
0.979
0.963
0.941
0.935
40 45 50
0.993
0.954
0.910
0.878
0.868
0.988
0.980
0.967
0.964
0.993
0.947
0.897
0.860
0.849
0.985
0.974
0.958
0.954
0.988
0.940
0.883
0.842
0.829
0.982
0.969
0.950
0.945
30 35
0.998
0.968
0.937
0.914
0.907
0.994
0.991
0.984
0.983
0.998
0.961
0.924
0.896
0.888
0.991
0.985
0.975
0.973
15 20 25
1
0.989
0.978
0.968
0.966
1.003
1.007
1.009
1.011
1
0.982
0.964
0.950
0.946
1
1.002
1.001
1.002
1
0.975
0.951
0.932
0.927
0.997
0.996
0.992
0.992
7.5 10
1
1
1
1
1
1.008
1.016
1.022
1.026
1
0.996
0.991
0.986
0.985
0.680
0.654
0.662
0.634
0.644
0.615
0.716
0.693
0.698
0.673
0.770
0.751
0.752
0.732
0.734
0.712
0.788
0.771
0.806
0.968 0.963 0.9630.973 0.9680.978 0.978 0.9730.9830.983
0.762 0.749 0.7360.789 0.7760.829 0.816 0.8030.8430.856
0.932 0.929 0.9260.940 0.9360.951 0.948 0.9440.9550.959
0.897 0.892 0.8870.908 0.9020.924 0.919 0.9120.9290.935
0.882 0.876 0.8700.894 0.8880.913 0.907 0.9000.9200.928
0.790
1.006
1.013
1.018
1.021
Equivalent piping length (m)
Cooling
Heating
71 model
100 model
125 model
140 model
71 model
100 model
125 model
140 model
φ15.88
φ19.05
(1)
105
ー
ー
90 95 100
ー
ー
ー
ー
ー
ー
80 85
ー
ー
ー
ー
65 70 75
ー
ー
ー
ー
ー
ー
60
ー
ー
Equivalent piping length (m)
Cooling
Heating
71 model
100 model
125 model
140 model
71 model
100 model
125 model
140 model
φ15.88
φ19.05
(1)
Note (1) Models FDU and SRK models only.
5m 10m 15m 20m 25m 30m
0.99 0.98 0.97 0.96 0.95 0.94
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
1.9.4 Height difference between the indoor unit and outdoor unit
Adjustment coefficient
7 10 15 20 25 30
1 1 1 1 1 1
1 0.99 0.975 0.965 0.95 0.935
Piping length (m)
Heating
Cooling
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