Daikin RXYQ34PY1 [141/487] Notes for heating capacity characteristics

Daikin RXYQ46PY1 [141/487] Notes for heating capacity characteristics
ED34-645B Capacity Tables (Heat Pump)
RXYQ-P 533
13
8.4 Notes for Heating Capacity Characteristics
The tables do not take account of the reduction in capacity when frost has accumulated or while the defrosting
operation is in progress.
The capacity values which take these factors into account, in other words the integrated heating capacity values,
can be calculated as follows:
Formula
Integrated heating capacity = A
Value given in table of capacity characteristics = B
Integrating correction factor for frost accumulation = C
A=B×C
Correction factor for finding integrated heating capacity
Note:
It will be seen from the figure above that the integrated heating capacity expresses the integrated heating capacity for
a single cycle (from defrost operation to defrost operation) in terms of time.
Please take note that when there is an accumulation of snow against the outside surface of the outdoor unit heat
exchanger there will always be a temporary reduction in capacity although this will, of course, vary in degree in
accordance with a number of other factors such as the outdoor temperature (°CDB), relative humidity (RH) and
the amount of frosting which occurs.
Inlet Port Temperature of Heat Exchanger (°C / RH 85%)
-7 -5 -3 0 3 5 7
Integrating Correction Factor for Frost Accumulation
0.95 0.93 0.88 0.84 0.85 0.90 1.00

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