Operating instructions
38
Heating system designs
System version 12 (cont.)
Required coding
02 : 2 Modulating burner operation
*1
0d : 0 Without Therm−Control
Automatic changeover
00 : 2 With DHW cylinder
Possible applications
For heating circuits with varying
temperatures.
Vitocrossal 300 is operated via the
boiler control unit two−stage or
modulating burners are regulated.
Vitocrossal 300 is equipped with two
return connectors. The heating
circuits with the higher return
temperature are connected to the
upper return connector, and those
with lower return temperatures to
the lower return connector. Note:
connect at least 15% of the rated
output to the lower return connector.
*1
If required.
5862730GB