Correction Factors According To Defrosting Operation - Hitachi MULTIZONE RAM-40NE2F Technical Catalogue

CAPACITIES AND SELECTION DATA
3-32

3.4. CORRECTION FACTORS ACCORDING TO DEFROSTING OPERATION

The heating capacity in the preceding paragraph, excludes the condition of the frost or the defrosting operation period. In
consideration of the frost or the defrosting operation, the heating capacity is corrected by the equation below.
Corrected heating capacity = Defrost Correction factor
OUTDOOR TEMPERATURE (°CDB)
Correction factor (humidity rate85% RH)
Correction Factor
Heating
capacity
NOTE:
The correction factor is not valid for special conditions such as snowfall or operation in a transitional period.
x unit capacity
-15 -10 -7
0.95 0.95 0.89
Reduction in
capacity due to white
frost
1 cycle
-5 0 7
0.85 0.81 1.0
Hour
Defrost max. 12mins
10 15
1.0 1.0