Configuration Example - Wolf DHW Series Installation Instructions Manual

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.
1. Calculating the heating output
26,00
24,00
22,00
20,00
18,00
16,00
15
14,00
12,00
11
10,00
8
8,00
6,00
4,00
2,00 2,00 2,00 2,00
0,00
-30 -30 -30 -25
With the estimated air inlet temperature (summer) of 25 °C plotted into the diagram
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
62
61
60
59
58
57
57
56
55
55
Set temp.
54
53
52.5
52
51
50
49
48
6
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.
3064300_201703
33. Configuration example
Winter mode
-20 -15 -10 -5
-6
16.7 l/min
8 10
8
0 5 10 15 20
7
36.7 l/min
25 l/min
Set
12
11
Heating output [kW]
Summer mode
25 30 35 40
Air inlet temperature [°C]
25
50 l/min
16
14
15
BWL-14
BWL-12
BWL-10
BWL-08
45
approx.
→
39