Viessmann VITODENS 200-W Installation And Service Instructions Manual page 19

Electrical connections
Hydraulic connection/ connection require-
ments
Multi boiler system
Multi-stage circulation pump (on site)
Residual head of circulation pump (coding address
E6 and E7)
When connecting a heating circuit without mixer and
without low loss header or heating water buffer cylin-
der, the circulation pump is controlled as a function of
outside temperature. The min. and max. speeds of the
circulation pump are limited by the settings for coding
addresses E6 and E7.
1200 120
1100 110
1000 100
900 90
800 80
700 70
600 60
500 50
400 40
300 30
200 20
100 10
0 0
0 1000
Flow rate in l/h
Fig.13
Setting for coding addresses E6, E7
Curve Coding address
value
B
C
D
E
F
G
(cont.)
Control unit setting
Coding address/group
30:0/Boiler/2
30:0/Boiler/2
F
E
D
C
B
A
2000 3000 4000
Pump rate, circula-
tion pump
50 50 %
60 60 %
70 70 %
80 80 %
90 90 %
100 100 %
5000 6000 7000 8000
Installation sequence
Circulation pump setting
Ext. In
2 2
6 6
12 12
Recommended for t = 15 K
Δ
≙
125 kW: = 4 7.17 m
■
≙
150 kW: = 6 8.60 m
■
9000
3
/h
3 /h
19