Viessmann Vitotronic 200 Installation And Service Instructions Manual page 24

Installation sequence
Connecting pumps
Pumps 400 V~
A Contactor
B Pump
Pumps in an underfloor heating circuit (system version 4)
sÖ Heating circuit control
F Temperature limiter
G Secondary pump
(after system separation)
H Primary pump
24
(cont.)
For controlling the contactor
Rated current
Recommended
connecting cable
The joint power consumption of both
pumps must not exceed 2 A.
4(2) A~
H05VV-F3G
2
0.75 mm
or
H05RN-F3G
2
0.75 mm