Opening The Boiler Door And The Clean−Out Cover - Viessmann VITOPLEX 100?LS Installation And Service Instructions Manual

Further details regarding the individual steps
Closing the Vitoair draught stabiliser
1. Switch ON the burner.
Opening the boiler door and the clean−out cover
4x
Note
Remove the gas supply pipe on gas
burners.
Initial start−up, inspection and maintenance
(if installed)
2. Switch OFF the system, when
pre−purge is running; this closes
the control disc.
(cont.)
9