Boiler In Heating/Cooling Application - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
Installation Examples

Boiler in heating/cooling application

Legend
A Heating/Cooling unit
B Spring-loaded flow check valve
C Circulation pump
D Expansion tank
E Water chiller
(continued)
IMPORTANT
Viessmann strongly suggests that the valves pictured
above be labelled "v1" and "v2".
The boiler, when used in connection with a refrigeration
system, must be installed ensuring the chilled medium is
piped in parallel to the boiler with appropriate valves to
prevent the chilled medium from entering the boiler.
The boiler piping system of a hot water heating boiler
connected to heating coils located in air handling units
where they may be exposed to refrigerated air circulation
must be equipped with flow control valves or other
automatic means to prevent gravity circulation of the
boiler water during the cooling cycle.
Check installation instructions of the chiller manufacturer
carefully for additional requirements.
Cooling season starts:
Close valve v1 and open valve v2.
Heating season starts:
Close valve v2 and open valve v1.
Connections
33