Adjusting The Fuel Supply And Air Supply; Adjusting The Ash Removal - Viessmann Vitoflex 300-UF Service And Maintenance Instructions

Troubleshooting

Adjusting the Fuel Supply and Air Supply

WARNING
Risk of poisoning from carbon monoxide and
carbonization gas as a result of incomplete combustion
caused by overfilling with fuel.
Ensure that the fuel supply and air supply are adjusted
correctly.
When changing to a different fuel, adjust the parameters
to suit the new fuel.

Adjusting the Ash Removal

30
Vitoflex 300-UF Service & Maintenance
The boiler is commissioned by Viessmann engineers.
As part of this process, the boiler will be adjusted so that
the available fuel in conjunction with the amount of air
supplied will result in optimum combustion.
Note: Overloading the combustion chamber leads to ash
glazing on the fireclay walls and thereby to
premature damage to the combustion chamber.
The lining, grates and metal parts in the combustion
chamber are wearing parts. Excessively high loads
will cause the parts to wear more quickly.
Overloading the system will also have an increased
impact on the boiler, dust extractor and chimney
causing them to wear more quickly too.
Ensure that the fuel supply and air supply are
adjusted correctly.
Note: The composition of the fuel may differ in terms of
particle size, type of wood, moisture content, bulk
density and other characteristics.
When changing to a different fuel, adjust the
parameters to suit the new fuel.
This will ensure optimum combustion of each fuel
type, that the combustion chamber is not
overloaded and that emission values are observed.
The amount of ash in the combustion chamber depends
on the ash content of the fuel. The Vitoflex 300-UF
removes ash automatically by moving the grate.
The intervals at which the grate is moved can be adjusted
to individual requirements. The ash is discharged
automatically via the ash removal system.
The ash removal cycle is matched to the relevant fuel
type during commissioning. Check the runtimes and pause
times of the ash removal cycle during operation.
The contractor or suitably trained persons must adjust
the times to suit the relevant fuel.
When setting the ash removal cycles, observe the
following principles:
Short runtime
Long pause time between ash removal events
Small pieces of fireclay (fragments) may break away
from the combustion chamber lining as a result of normal
wear. These fireclay fragments are removed by
the ash removal system. The breaking off of small fireclay
particles has no negative impact on the standard
service life of the combustion chamber.