39
3064300_201703
33. Configuration example
According to standard calculations, a detached house requires a BWL-1-10 and a 200 l DHW cylinder. The customer
requires a DHW temperature of 55 °C at an air inlet temperature of 25 °C without using the heater rod.
The purpose of these diagrams is to clarify whether this is possible.
With the estimated air inlet temperature (summer) of 25 °C plotted into the diagram
→
approx.
15 kW heating output In winter, with an air inlet temperature of e.g. -6 °C, a heating output of
8 kW is available.
2. Calculating the max. cylinder water temperature without use of heater rod = ECO mode
Using the calculated heating output, the diagram for the CEW-1-200 can serve to determine the maximum possible
cylinder temperature by means of the flow rate (approx. 37 l/min). In summer mode, with an air inlet temperature of
25 °C (heating output 15 kW), a cylinder temperature of 52.5 °C can be achieved. In winter operation, with an air
inlet temperature of -6 °C (heating output 8 kW), a cylinder temperature of 57 °C is achieved. The desired cylinder
temperature of 55 °C at an air inlet temperature of 25 °C is not possible with the CEW-1-200.
With the SEW-1-400, the desired temperature is achievable.
1. Calculating the heating output
-30
-30
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
2,00
2,00
2,00
2,00
4,00
6,00
8,00
10,00
12,00
14,00
16,00
18,00
20,00
22,00
24,00
26,00
0,00
Heating
output
[kW]
Air inlet temperature [°C]
BWL-10
BWL-14
BWL-12
BWL-08
Winter mode
Summer mode
-6
7
25
15
11
8
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
6
8
10
12
14
16
Cylinder temperature [°C]
Heating output [kW]
50 l/min
36.7 l/min
25 l/min
16.7 l/min
Set
Set temp.
8
11
15
57
55
52.5