Special Applications - Aquastat - Viessmann Vitorond 100 VR1 series Technical Data Manual

Special Applications - Aquastat

Boiler in a heating/cooling application
v2
Fig. 7
Low water cut-off
Fig. 8
12
v1
F
Cooling season starts:
close valve v1 and open valve v2
Heating season starts:
close valve v2 and open valve v1
Heating/Cooling unit
F
Spring-loaded flow check valve
Circulation pump
Automatic air vent,
Pressure relief valve
High limit control
Water chiller
Expansion tank
IMPORTANT
We strongly suggest that the valves
pictured above be labelled "v1" and v2."
A low water cut-off may be required by local
codes. If boiler is installed above radiation
level, a low water cut-off device
approved type (field supplied) must be
installed in all instances. Do not install an
isolation valve between boiler and low water
cut-off.
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