Viessmann VITODENS 100-W Installation And Service Instructions Manual page 44

Commissioning, inspection, maintenance
Further details regarding the individual steps
Note
Using key A supplied, you can
recharge the gas combi boiler at the fill
valve.
Checking all gas equipment for tightness at operating pressure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for tight-
ness.
44
A
!
Please note
The use of leak detection spray
can result in incorrect functions.
Leak detection spray must not
reach electrical contacts or seal
diaphragm openings on the gas
valve.
(cont.)