-
135
-
(ii) Models 302 ~ 602
Ambient air temperature 5°C or more
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
1.006
1.013
1.018
1.021
Equivalent piping length
(1)
(m)
Cooling
Heating
φ
15.88
φ
19.05
302 model
402 model
502 model
602 model
302 model
402 model
502 model
602 model
Ambient air temperature -5°C
55
0.988
0.669
0.769
0.724
0.709
0.691
0.863
0.841
0.835
40
45
50
0.993
0.710
0.841
0.810
0.800
0.727
0.911
0.898
0.895
0.993
0.696
0.817
0.781
0.769
0.715
0.895
0.879
0.875
0.988
0.682
0.793
0.752
0.739
0.703
0.879
0.860
0.855
30
35
0.998
0.738
0.890
0.868
0.861
0.750
0.943
0.936
0.935
0.998
0.724
0.866
0.839
0.830
0.738
0.927
0.917
0.915
15
20
25
1
0.779
0.963
0.954
0.952
0.786
0.992
0.994
0.996
1
0.765
0.938
0.926
0.921
0.774
0.975
0.974
0.975
1
0.751
0.914
0.897
0.891
0.762
0.959
0.955
0.955
7.5
10
1
0.800
1
1
1
0.806
1.016
1.022
1.026
1
0.793
0.987
0.983
0.982
0.798
1.008
1.013
1.016
Equivalent piping length
(1)
(m)
Cooling
Heating
φ
15.88
φ
19.05
302 model
402 model
502 model
602 model
302 model
402 model
502 model
602 model
Ambient air temperature -15°C
55
0.988
0.404
0.668
0.623
0.608
0.403
0.762
0.740
0.734
40
45
50
0.933
0.466
0.773
0.742
0.732
0.465
0.842
0.829
0.826
0.993
0.446
0.738
0.702
0.690
0.444
0.816
0.800
0.796
0.988
0.425
0.703
0.662
0.649
0.424
0.789
0.770
0.765
30
35
0.998
0.507
0.843
0.821
0.814
0.507
0.896
0.889
0.888
0.998
0.487
0.808
0.782
0.773
0.486
0.869
0.859
0.857
15
20
25
1
0.569
0.948
0.940
0.938
0.569
0.976
0.978
0.980
1
0.549
0.913
0.901
0.897
0.548
0.949
0.948
0.949
1
0.528
0.878
0.861
0.856
0.527
0.922
0.918
0.918
7.5
10
1
0.600
1
1
1
0.605
1.016
1.022
1.026
1
0.590
0.983
0.980
0.979
0.590
1.002
1.007
1.010
Equivalent piping length
(1)
(m)
Cooling
Heating
φ
15.88
φ
19.05
302 model
402 model
502 model
602 model
302 model
402 model
502 model
602 model
Note (1) Calculate the equivalent length using the following formula.
However, install the piping so that the piping length is 5 m of the limit length (actual length) for the respective types.
• Equivalent Length = Actual (Equivalent bend length x number of bends in the piping.)
Equivalent length per bend.
φ
12.7
0.20
φ
15.88
0.25
φ
19.05
0.30
Gas Pipe Diameter (mm)
Equivalent Bend Length
(iii) Models 802, 1002
Ambient air temperature 5°C or more
Equivalent piping length
(1)
(m)
Cooling
Heating
7.5
10
15
20
25
30
35
40
45
50
55
1
0.998 0.995 0.991 0.988 0.984 0.981 0.977 0.974 0.970 0.967
1
0.998 0.995 0.991 0.988 0.984 0.981 0.977 0.974 0.970 0.967
1
0.996 0.990 0.984 0.978 0.972 0.966 0.960 0.954 0.948 0.942
0.993 0.990 0.984 0.977 0.971 0.964 0.958
0.988 0.983 0.973 0.963 0.953 0.943 0.933
1.003 1.002
1
0.998 0.996 0.994 0.992 0.990 0.988 0.986 0.984
1.004 1.003 0.999 0.996 0.992 0.989 0.985 0.982 0.978 0.975 0.971
60
0.963
0.963
0.936
0.982
0.968
65
0.960
0.960
0.930
0.980
0.964
70
0.956
0.956
0.924
0.978
0.961
75
0.953
0.953
0.918
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0.976
0.957
φ
28.58
φ
22.22
φ
25.4
802 model
1002 model
802 model
1002 model
802 model
1002 model
