Installation Examples - Hydrostat 3250-Plus - Viessmann Vitorond 100 VR1 Series Installation And Service Instructions Manual

Connections
Installation Examples - Hydrostat
Legend
A Heating/Cooling unit
B Spring-loaded flow check valve
C Circulation pump
D Automatic air vent,
E Pressure relief valve
F Hydrostat 3250-Plus (with low water cut-off)
G Water chiller
H Expansion tank
50
Vitorond 100, VR1-22 to -33 Installation and Service
Boiler in a heating/cooling application
Cooling season starts: close valve v1 and open valve v2
Heating season starts: close valve v2 and open valve v1
IMPORTANT
We strongly suggest that the valves be labelled "v1" and v2."
Legend
A Heating circuit
B Spring-loaded flow check valve
C Circulation pump
D Automatic air vent,
E Pressure relief valve
F Hydrostat 3250-Plus (with low water cut-off)
G Expansion tank