Viessmann VITODENS 242-F Installation And Service Instructions Manual page 27

Installing the boiler
Gas connection
Shown with connection sets for finished walls (accessories)
A Gas connection R½
Information on operation with LPG
We recommend the installation of an
external safety solenoid valve when
installing the boiler in rooms below
ground level.
1. Secure gas shut-off valve to gas con-
nection A.
(cont.)
2. Carry out a tightness test.
Note
Only use suitable and approved leak
detection agents (EN 14291) and
devices for the tightness test. Leak
detection agents with unsuitable con-
stituents (e.g. nitrites, sulphides) can
cause material damage.
Remove residues of the leak detec-
tion agent after testing.
Installation sequence
27