Connections On The Flue Gas Side; Flue Outlet And Siphon - Viessmann Vitogate 300 Installation Instructions Manual

Connections on the heating water side
Danger
There is a risk of injury when
working on pressurised compo-
nents.
Only open the connections on the
heating water side after the boiler
has been depressurised.
Note
■ The boiler is only suitable for fully pum-
ped hot water heating systems.
■ Install all pipe connections free of load
and torque stress.
1. Thoroughly flush the heating sys-
tem.

Connections on the flue gas side

Flue outlet and siphon

14
1.
(cont.)
2. Note
Never connect heat consumers to the
safety connector.
Make all necessary connections.
Connecting a single heating circuit:
Connect the heating return to
boiler return 1.
Connecting two heating circuits: Con-
nect the heating circuit with the higher
temperature level to boiler return 2.
Connect at least 15 % of the boiler
heating output to boiler return 1.
Close test ports that are not used for
the installation of a probe or sensor.
3.