-
136
-
Ambient air temperature -5°C
Equivalent piping length
(1)
(m)
Cooling
Heating
7.5
10
15
20
25
30
35
40
45
50
55
1
1
0.993 0.979 0.965 0.950 0.936 0.922 0.908 0.894 0.880 0.866
1
0.991 0.974 0.958 0.941 0.925 0.908 0.891 0.875 0.858 0.841
0.993 0.985 0.968 0.951 0.934 0.917 0.899
0.988 0.978 0.957 0.937 0.916 0.895 0.875
1.003 0.996 0.984 0.971 0.958 0.946 0.933 0.921 0.908 0.896 0.883
1.004 0.997 0.983 0.969 0.955 0.941 0.927 0.913 0.899 0.885 0.870
60
0.852
0.825
0.870
0.856
65
0.838
0.808
0.858
0.842
70
0.824
0.791
0.845
0.828
75
0.810
0.775
0.833
0.814
φ
28.58
φ
22.22
φ
25.4
802 model
1002 model
802 model
1002 model
802 model
1002 model
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
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Ambient air temperature -15°C
Equivalent piping length
(1)
(m)
Cooling
Heating
7.5
10
15
20
25
30
35
40
45
50
55
1
1
0.987 0.963 0.938 0.913 0.889 0.864 0.839 0.815 0.790 0.765
1
0.986 0.959 0.932 0.904 0.877 0.850 0.823 0.795 0.768 0.741
0.993 0.980 0.952 0.924 0.897 0.869 0.841
0.988 0.973 0.941 0.910 0.879 0.848 0.817
1.003 0.991 0.968 0.945 0.921 0.898 0.875 0.852 0.829 0.806 0.782
1.004 0.992 0.967 0.943 0.918 0.893 0.869 0.844 0.819 0.795 0.770
60
0.741
0.713
0.759
0.745
65
0.716
0.686
0.736
0.720
70
0.691
0.659
0.713
0.696
75
0.667
0.631
0.690
0.671
φ
28.58
φ
22.22
φ
25.4
802 model
1002 model
802 model
1002 model
802 model
1002 model
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
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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
15.88
0.25
φ
22.22
0.35
φ
25.4
0.40
φ
28.58
0.45
Gas Pipe Diameter (mm)
Equivalent Bend Length
(5)
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
5m
10m
15m
20m
25m
30m
Adjustment coefficient
0.01
0.02
0.03
0.04
0.05
0.06
Piping length limitations
Model
Item
151~251
302, 402, 502, 602
802, 1002
Max. one way piping length
40m
50m
70m*
Max. vertical height difference
Outdoor unit is higher 30m Outdoor unit is lower 15m
Notes (1) Values in the table indicate the one way piping length between the indoor and outdoor units.
(2) When
φ
22.22 gas pipe is applied to 802 and 1002 (*mark), maximum one way length is limited to 30m.
How to obtain the cooling and heating capacity
Example : The net cooling capacity of the model FDUMVA402HEN2R with the air fl ow “High”, the piping length of 15m, the outdoor
unit located 5m lower than the indoor unit, indoor wet-bulb temperature at 19.0 ˚C and outdoor dry-bulb temperature 35 ˚C is
Net cooling capacity =
10.0
×
1.00
×
(0.978
(1)
- 0.01)
×
1.0
≈
9.7
kW
Note (1) The above conditions show calculations for when the outside air temperature is 5°C or higher and the gas pipe size is
φ
15.88.
The capacity correction coefficient will differ depending on the proportions between the outside air temperature and the gas pipe size.
Factor by air
temperatures
FDUMVA402HEN2R
Air fl ow
“High”
Length 15m.
Height difference 5m
