Gas Connection - Viessmann Vitodens 300 Installation Instructions Manual

Gas connection

A Gas connection
Notes regarding the operation with
LPG.
We recommend the installation of an
external safety solenoid valve when
installing the boiler in rooms below
ground level.
10
1. Carry out a gas soundness test.
!
Please note
Excessive test pressure
may damage the boiler and
the gas valve.
Max. test pressure 150
mbar. Where higher pres-
sure is required for leak
tests, separate the boiler
and the gas valves from the
gas supply pipe (undo the
fitting).
2. Vent the gas supply pipe.
Conversion to other gas
types:
Conversion kit installation
instructions