Viessmann VITODENS 242-F Technical Manual page 44

Installation accessories
With three-stage circulation pump
70 700
60 600
50 500
40 400
30 300
20 200
10 100
0 0
0 100 200
Flow rate in l/h
A Stage 1
B Stage 2
C Stage 3
Assembly kit scope
The following diagram shows the relationship between the transferable
outputs of the heating circuit with mixer and the heating circuit without
mixer.
5
8
6
4
C
2
0
0 1 2
Output in kW — heating circuit with mixer
A Vitodens, 19 kW
B Vitodens, 26 kW
VIESMANN
44
(cont.)
300 400 500 600 700
B
A
E
D
3 4 5 6 7
800 900 1000 1100 1200
The diagram is based on the following system conditions:
■ Pressure drop in the heating circuit without mixer: 100 mbar
■ ΔT heating circuit without mixer: 20 K
■ ΔT heating circuit with mixer: 10 K
E
B
A
8 9 10 11 12
C Output range of the heating circuit without mixer without line reg-
ulating valve
1300 1400 1500 1600
26
24
22
20
18
16
14
12
10
8
6
4
2
0
13
14
VITODENS