Daikin ERQ-AV1 Technical Data Manual

Daikin ERQ-AV1 Technical Data Manual Manual pdf 8 page image

• Air Handling Unit Connection • ERQ-AV1• Air Handling Unit Connection • Heat pump64 Integrated heating capacity coefficient3TW30402-1Integrated heating capacity coefficientThe 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 followsFormula:Integrated heating capacity = AValue given in table of capacity characteristics = BIntegrating correction factor for frost accumulation (kW) = CA = B x CCorrection factor for finding integrated heating capacityERQ-AV1Inlet port temperature of heat exchanger (°C/RH 85%) -7 -5 -3 0 3 5 7Integrating correction factor for frost accumulation 0,88 0,86 0,8 0,75 0,76 0,82 1,0Please note that, when there is an accumulation of snow against the outside surface of the outdoor unit heatexchanger, there will always be a temporary redusion in capacity, although this will of course vary in degree inaccordance with a number of other factors, such as the outdoor temperature (°CDB), relative humidity (RH) andthe amount of frosting which occurs.Note:1. The figure shows that the integrated heating capacityexpresses the integrated capacity for a single cycle (fromdefrost operation to defrost operation) in terms of time.Defrosting operation Defrosting operationTimeOne cycleHeating capacity