Airwell AQH 110 [7/28] Operating temperature range cooling mode

Page 7

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-5

20 25

30 35 40 45 50

The following information is required for selecting the appropriate

model :

1. Required cooling capacity in kW.

2. Chilled water inlet / outlet temperatures.

3. Outdoor air temperature.

4. Altitude (in metres) above sea level.

N.B. : the cooling capacity is determined by the following formula :

Cooling capacity (kW) = [Water flow (l/h) x Delta T (K)] / 860

Selection example

Data :

- Required cooling capacity : 21 kW.

- Outlet water temperature : 6 °C.

- Inlet water temperature : 11 °C.

- Outdoor air temperature : 30 °C.

- Altitude : 0 m.

In the performance table on Page 13, the model 20 will supply

cooling capacity of 21.7 kW with a power consumption of 6.8 kW.

Comment : Interpolation is authorised for conditions

differing from those indicated in the performance table.

However, extrapolation is prohibited.

The water flow will be equal to (21.7 kW / 5 K) x 860 = 3732 l/h.

Determine the unit’s available pressure from the curves on

pages 17 and 18 or the evaporator water pressure drops from the

curves on pages 19 and 20.

Outlet water temperature (°C)

Ambient air temperature (°C)

Standard unit

operating range

Operating temperature range - Cooling mode

Operating temperature range - Heating mode

Outlet water temperature (°C)

Ambient air temperature (°C)

Standard unit

operating range

Selection guide