Viessmann VITOCROSSAL 200 CI2 Series Installation Instructions Manual page 31

Vitocrossal 200 CI2 Installation
Electrical Connections
Isolation Valve
Pump Connection (DIN rail)
Legend
A Boiler pump (system pump connection on lead boiler)
power supply DIN rail connect
B 0-10VDC pump modulation signal
(continued)
A B
Rated voltage
Rated current Max.
Note: Boiler isolation valve must be power open spring
return.
Boiler isolation valves are available from Viessmann as an
accessory.
2 in. isolation valve (CI2 399/500) Part number 7946553
2b in. isolation valve (CI2 750/1000) Part number 7946552
4 in. isolation valve (CI2 1500/2000) Part number 7946551
Rated voltage
Rated current Max.
Installation
120V~
2A~
120V~
2A~
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