• Air Handling Unit Connection • ERQ-AV1
• Air Handling Unit Connection • Heat pump
6
4
Integrated heating capacity coefficient
3TW30402-1
Integrated heating capacity coefficient
The heating capacity 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 (kW) = C
A = B x C
Correction factor for finding integrated heating capacity
ERQ-AV1
Inlet port temperature of heat exchanger (°C/RH 85%)
-7
-5
-3
0
3
5
7
Integrating correction factor for frost accumulation
0,88
0,86
0,8
0,75
0,76
0,82
1,0
Please 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 redusion 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.
Note:
1. The figure shows that the integrated heating capacity
expresses the integrated capacity for a single cycle (from
defrost operation to defrost operation) in terms of time.
Defrosting operation
Defrosting operation
Time
One cycle
Heating
capacity
