Mitsubishi Heavy Industries FDTCVA SERIES Technical Manual page 135

3) Models 802, 1002
1.10
1.00
0.90
0.80
0.70
0.60
0.50
-15 -13
(3) Correction of cooling and heating capacity in relation to air fl ow rate control (fan speed)
Coeffi cient: 1.00 at High, 0.97 at Middle, 0.95 at Low
(4) 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.
(i) Models 151~251
(1)
Equivalent piping length
Heating
151 model
Cooling 201 model
251 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
Indoor air
temperature 12˚CW.B
Indoor air
temperature 19˚CW.B
-9 -5 -1 3
Ambient air temperature (˚CDB)
m 7.5 10
1.0 0.995 0.992
1.0 0.997 0.991
1.0 0.996 0.989
1.0 0.995 0.986
φ12.7 φ15.88
0.20 0.25
Indoor air
temperature 24˚CW.B
7 11 15 19
15 20 25 30
0.990 0.987 0.984
0.985 0.980 0.974
0.981 0.973 0.966
0.977 0.967 0.958
134
- -
Indoor air
temperature 16˚CW.B
23 27 31 35
35 40 45
0.981 0.978 0.975
0.968 0.962 0.956
0.958 0.951 0.943
0.948 0.939 0.930
39 43
50 55
0.972 0.970
— —
— —
— —