Boiler Piping In Heating/Cooling Application - Viessmann VITOCROSSAL 200 CI2 Series Installation Instructions Manual

System Layout

Boiler Piping in Heating/Cooling Application

Legend
A System supply
B System return
C Valve
D Supply check valve
E Circulation pump
F Automatic feed valve
G Pre-charged expansion tank
44
Heating /
Cooling unit
Heating /
Cooling unit
Heating /
Cooling unit
Water
Chiller
The Vitocrossal 200, CI2 boiler, when used in connection
with a refrigeration system, must be installed so that the
chilled medium is piped in parallel to the boiler and with
appropriate valves to prevent the chilled medium from
entering the boiler.
The boiler piping system of a hot water heating boiler is
connected to the heating coils located in the air handling
units. The boiler piping system may be exposed to chilled
water and must be equipped with flow control valves or
other automatic means to prevent gravity circulation of the
boiler water during the cooling cycle.
Check the 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.
Metal tags labelling these valves should be attached.
IMPORTANT
In the above system, the circulating pump must be
operated from a separate on/off switch - not from the
boiler control.
Vitocrossal 200 CI2 Installation