Viessmann VITODENS 242-F Technical Manual page 36

Installation accessories
Residual head of the integral circulation pump for the heating circuit with mixer
With variable speed high efficiency DC pump
60 600
50 500
40 400
30 300
20 200
10 100
0 0
0 100 200
Flow rate in l/h
With three-stage circulation pump
70 700
60 600
50 500
40 400
5
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.
VIESMANN
36
(cont.)
Min.
300 400 500 600 700
300 400 500 600 700
Max.
800 900 1000 1100 1200
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
1300 1400
1300 1400 1500 1600
VITODENS