Viessmann Vitocrossal 300 Series Technical Data Manual page 26

Installation Examples
System Layout 7
Multiple (up to eight) Vitocrossal 300 CU3A with...
- multiple heating circuits with mixing valves
- low-loss header
Legend
Vitocrossal 300 CU3A boiler
A
Vitotronic 300K, MW2C
B
C Low-loss header/common supply temperature sensor
Low-loss header
D
E DHW storage tank
F High temperature heating circuit
Low temperature heating circuit
G
26
Vitocrossal 300 CU3A 26 to 199 Technical Data
When designing a multiple Vitocrossal 300 CU3A system
as shown above, please reference applicable multiple
Vitocrossal 300 CU3A technical documentation, and
contact your local Viessmann Sales Representative for
further assistance.
This installation example depicts a possible piping layout
for multiple Vitocrossal 300 CU3A boilers equipped with
Viessmann System Technology. Please note that this
example is based on a simplified conceptual drawing only!
Piping and necessary componentry must be field verified.
A low water cut-off (LWCO) must be installed where
required by local codes.
Proper installation and functionality in the field is the
responsibility of the heating contractor.
WARNING
If a DHW storage tank other than a Viessmann Vitocell
100 or 300 tank is used, the installer must verify proper
operation of the Viessmann DHW tank temperature
sensor with the original manufacturer of the tank.
Viessmann strongly recommends the installation of a
temperature tempering valve in the DHW supply line.