Daikin REYQ32M7W1B [21/32] Integrated heating capacity coefficient

• Selection procedure

• Systems • Selection procedure

3 Integrated heating capacity coefficient

1 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 (kW) = C

A = B x C

2 Correction factor for finding integrated heating capacity

3 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 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 0.96 0.93 0.87 0.81 0.83 0.89 1.0

Defrosting operation

Heating capacity

1 cycle

Time

Defrosting operation

NOTE

• The figure shows that the integrated

heating capacity expresses the integrated

heating capacity for a single cycle (from

defrost operation to defrost operation) in

terms of time.