Adjusting The Fuel Supply And Air Supply; Adjusting The Ash Removal - Viessmann Vitoflex 300-RF 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

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Vitoflex 300-RF 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 fireproof interior lining 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 ad
justed 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. The combustion chamber is not overloaded
and the emission values are observed.
The amount of ash in the combustion chamber depends
on the ash content of the fuel. The Vitoflex 300-RF
removes ash automatically by means of a moving
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 pause times of
the ash removal cycle during operation. The Boiler
technician or suitably trained persons must then adjust
the times to suit the relevant fuel.
When setting the ash removal cycles, observe the
following principle:
Long pause time between ash removal events.
Small fragments may break away from the refractory
concrete in the combustion chamber as a result of
normal wear. These concrete fragments are removed
by the ash removal system. The breaking away of
small concrete fragments has no negative impact on
the service life of the combustion chamber.