Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 29

Connections on the heating water side
Note
Route water pipes so that all casing panels are acces-
sible and can be removed for maintenance.
Note
Only connect controlled heating circuits with mixer.
Overview of connections
Fig. 21
Safety equipment block connection G 1
A
connections)
Boiler flow G 1
B
½
Boiler return G 1
C ½
Drain R
D ¾
Remove the protective caps from the connectors.
Installing the return temperature raising facility
If the automatically controlled return temperature rais-
ing facility (accessories) is to be used, install it now.
A
B
C
D
(safety
½
Installation sequence
Installation instructions for return temperature
raising facility
29