Viessmann VITODENS 100-W Installation And Service Instructions Manual page 15

Fitting the boiler and making connections
Installation sequence
(cont.)
2. Carry out a tightness test.
Note
Only use suitable and approved leak
detection agents (EN 14291) and
devices to check for leaks. 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.
!
Please note
Excessive test pressure may
damage the boiler and the gas
valve.
Max. test pressure 150 mbar.
Where higher pressure is
required for tightness tests,
disconnect the boiler and the
gas valves from the gas sup-
ply pipe (undo the fitting).
3. Vent the gas line.
15