Flue Gas Connection; Gas Connection - Viessmann VITODENS 333 WS3A Installation Instructions Manual

Flue gas connection

Connect the balanced flue pipe.

Gas connection

A Gas connection
Conversion to other gas
types:
Conversion kit installation
instructions
8
Flue gas system installation
instructions.
Information regarding operation
with LPG
We recommend the installation of an
external safety solenoid valve when
installing the boiler in rooms below
ground level.
1. Carry out a leak test.
!
Important information
Excessive test pressure
leads to damage to the boi-
ler and gas train.
Max. test pressure
150 mbar. If a higher pres-
sure is required for leak
tests, separate the boiler
and the gas train from the
mains gas supply (undo fit-
tings).
2. Purge the gas supply pipe.