Checking The Burner Adjustment; Shutting Down The System - Viessmann Vitoradial 300-T Service Instructions Manual

Commissioning the system
12. Once the flow temperature has been reached,
successively switch on the heat consumers.
Switch the burner over to automatic mode.
!
Please note
When checking CO levels in the flue gas,
internal outgassing from the thermal block
can result in higher values.
Continue to operate the boiler until a decline
can be clearly recognised.
13. Check all gaskets and plugs, and tighten if neces-
sary.

Checking the burner adjustment

Burner service instructions

Shutting down the system

Danger
There is a risk of injury when working on pres-
surised components.
Only open the connections on the heating water
side after the boiler has been depressurised.
Only drain the boiler with a suction pump when
the air vent valve is open.
Commissioning, inspection, maintenance
(cont.)
14. Check the boiler door and cleaning cover after
approx. 50 hours run. Tighten the screws.
Danger
Opening the connections on the heating water
side whilst the boiler is under pressure can
result in injuries.
First depressurise the boiler.
Only drain the boiler with a suction pump when
the air vent valve is open.
11