Airwell AQH 50 [8/28] Hydraulic circuit water volume
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Airwell AQH 50 [8/28] Hydraulic circuit water volume

Airwell AQH 70 [8/28] Hydraulic circuit water volume
Page 8
Temperature min. max
Inlet water at start-up °C 18 -
Inlet water during running °C 20 45
Outlet water during running (without glycol) °C 25 50
Water temperature difference K 3 7
Working pressure bar - 3
Air °C -5 20
Operating limits (*) - Cooling mode Operating limits (*) - Heating mode
Selection guide (continued)
(*) For chilled water ∆T = 5K. (*) For hot water ∆T = 5K.
Temperature min. max
Inlet water at start-up °C 10 30
Inlet water during running °C 10 23
Outlet water during running (without glycol) °C 5 18
Water temperature difference K 3 7
Working pressure bar - 3
Air °C -10 46
Altitude correction factors
Altitude
(m)
Cooling capacity
correction factors
Power consumption
correction factors
0 1.000 1.000
600 0.987 1.010
1200 0.973 1.020
1800 0.958 1.029
2400 0.943 1.038
Evaporator fouling factors
Fouling factors
(m
2
.°C/kW)
Cooling capacity
correction factors
Power
consumption
correction factors
0.044 1.000 1.000
0.088 0.987 0.995
0.176 0.964 0.985
0.352 0.915 0.962
Condenser fouling factors
Fouling factors
(m
2
.°C/kW)
Cooling capacity
correction factors
Power
consumption
correction factors
0.044 1.000 1.000
0.088 0.987 1.023
0.176 0.955 1.068
0.352 0.910 1.135
Chilled water inlet/outlet temperature
correction factors
Chilled water
in/out temp. (°C)
Cooling capacity
correction factors
Power
consumption
correction factors
14 / 7 (
∆
T=7 K) 0.970 0.990
12 / 7 (
∆
T=5 K) 1.000 1.000
10 / 7 (
∆
T=3 K) 1.030 1.010
Hydraulic circuit water volume
Maximum volume (*) in litres for comfort air conditioning applications
Minimum volume for comfort air conditioning applications
(*) Volumes calculated for Eurovent operating conditions (air : 35 °C, water 12/7 °C) with a 2.5 l/kW ratio. For other nominal operating
conditions, recalculate the minimum volume by multiplying the corresponding cooling capacity by the 2.5l/kW ratio.
If the minimum volume requirement can not be met, an additional buffer tank must be included in the installation.
(*) Limit linked to the unit’s expansion tank volume. In the case of an installation with a water volume greater than the values stated in the
above table, an additional buffer tank must be included in the installation.
Sizes 20 to 35 40 to 80 90 to 130
Water 300 600 1500
10% glycol solution 225 450 1200
15% glycol solution 215 425 1100
20% glycol solution 200 400 1000
25% glycol solution 185 375 930
30% glycol solution 175 350 860
35% glycol solution 150 300 800
Sizes 20253035405060708090100110120130
Volume* (litres)
54 65 75 86 105 120 145 170 190 220 245 280 310 330

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