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5583 571 - 05
Vitorond 100, VR1 22 to 33, 91 to 140 Installation and Service
Installation Examples - Hydrostat 3250-Plus
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
We strongly suggest that the valves be labelled “v1” and v2.”
IMPORTANT
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
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
Connections
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