Viessmann VITODENS 111-W Installation And Service Instructions Manual page 35

Further details regarding the individual steps
6. Check the gas connections for tight-
ness.
Danger
Escaping gas leads to a risk of
explosion.
Check all fittings for gas tight-
ness.
!
Please note
The use of leak detection
spray can result in incorrect
function.
Leak detection spray must not
reach electrical contacts or
seal diaphragm openings on
the gas valve.
Commissioning, inspection, maintenance
(cont.)
7. Push grommet C up again.
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