Checking The Burner Gasket And Burner Gauze Assembly - Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors

Further details regarding the individual steps
1. Switch OFF the main power supply
and the ON/OFF switch at the control
unit.
2. Close the gas shut-off valve and safe-
guard against reopening.
3. Undo re-usable cable ties A at the
gas/air duct of the auxiliary burner.
4. Pull cables from ignition electrode
B and ionisation electrode C as
well as the earth cable.

Checking the burner gasket and burner gauze assembly

Check burner gasket A and burner
gauze assembly E for possible damage
and replace if required.
Commissioning, inspection, maintenance
(cont.)
5. Undo the union nut on gas/air duct
D.
6. Undo four screws from the burner
cover and remove burner E.
!
Please note
If the wire gauze is damaged,
this can affect the burner func-
tion.
Never rest the burner on the
gauze assembly.
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