Closing The Vitoair Draught Stabiliser (If Installed); Opening The Boiler Door And Cleaning Cover - Viessmann VITOPLEX 300 Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
13. Check all gaskets and plugs, and
retighten if necessary.
14. Check the boiler door and cleaning
cover after approx. 50 hours run and
retighten all screws.

Closing the Vitoair draught stabiliser (if installed)

1. Start the burner.

Opening the boiler door and cleaning cover

Note
On systems with gas burners, remove
the gas supply pipe.
8
(cont.)
Danger
Opening the connections on the
heating water side whilst the
boiler is under pressure can
result in injuries.
First depressurise the boiler.
Drain the boiler with a suction
pump only when the air vent
valve has been opened.
2. With the pre-purge running, shut
down the system. The control disk will
then be closed.