Viessmann Vitocrossal 300 Series Technical Data Manual page 23

Vitocrossal 300 CU3A 26 to 199 Technical Data
System Layout 4
Vitocrossal 300 CU3A with...
- direct-connected heating circuit
- one heating circuit with system separation
Legend
A Vitocrossal 300 CU3A boiler with Vitotronic 200,
KW6B outdoor reset control
Outdoor temperature sensor !
B
C Vitotrol remote (optional)
Under floor heating circuit
D
E Radiator heating circuit
F Plate heat exchanger for system separation
Heating circuit pump
G
H Mixing valve temperature sensor ?
Accessory kit for heating circuit with mixing valve
I
DHW storage tank
J
K DHW tank temperature sensor %
Expansion tanks
L
Temperature and pressure relief valve
M
N Pressure relief valve
DHW recirculation pump
O
P Boiler pump
20
Q DHW circulating pump sA
* Function based on coding of address 53
*
28/20
Installation of different heating circuits...
radiator heating circuit (high-temp. circuit)
■
under floor heating circuit with 3-way mixing valve
■
(low-temp. circuit)
DHW production
■
The 3-way mixing valve, built-in to achieve the low-
temperature level of the under floor heating circuit, is
controlled by an accessory kit for a heating circuit with
mixing valve I. The boiler pump
radiator heating circuit and the plate heat exchanger
for system separation.
IMPORTANT
The pressure drop (secondary circuit) of the plate heat
exchanger F must be less/equal to the pressure drop of
the 3-way mixing valve. This must be taken into account
when sizing the plate heat exchanger.
Installation Examples
supplies the
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