Visual Inspection Of Combustion; Unjamming The Ash Removal Screw Conveyor - Viessmann Vitoflex 300-UF Service And Maintenance Instructions

Vitoflex 300-UF Service & Maintenance

Visual Inspection of Combustion

CAUTION
Risk of burns due to hot machine components.
Only touch handles and identified parts.
Never touch sight glasses or their retainers.
These components are connected directly to the
combustion chamber.

Unjamming the Ash Removal Screw Conveyor

CAUTION
Risk of crushing by and entanglement in the ash removal
screw conveyor.
Never reach in through the maintenance cover.
WARNING
There is a risk of deflagration when the combustion
chamber door is opened. Poking around in the firebed
leads to oxygenation, which can produce a flash.
Both can result in severe burns.
Never open the combustion chamber door during
operation. Before opening the combustion chamber door,
ensure that you are standing in a safe place.
Never poke around in the firebed.
CAUTION
Hot ash and slag may result in burns.
Wear protective gloves when handling ash and slag.
During operation, the controller controls, regulates and
monitors all components and system parts automatically.
Check flames in the combustion chamber through the
sight glass.
The ideal flame is yellow to light yellow. This indicates
normal combustion in which the fuel burns cleanly.
Note: Wear personal protective equipment.
Always wear a face mask when handling ash or slag.
Requirements:
The system is switched off.
The firebed is completely burned down.
Check the firebed through the sight glass.
1. At the programming unit, switch to manual mode
under "Fuel" – "Combustion chamber ash removal".
2. Open the combustion chamber door.
3. Select the "Fuel" screen, then under "Combustion
chamber ash removal" alternately select "Clockwise
rotation" and "Anti-clockwise rotation".
The ash removal screw conveyor runs forwards and
backwards alternately. This action will unjam the
ash removal screw conveyor.
4. Stop the movement of the ash removal screw
conveyor.
The ash removal screw conveyor comes to a halt.
5. Remove large bits of slag with a poker or similar.
6. Close the combustion chamber door.
7. On the programming unit, switch back to automatic
mode. The ash removal screw conveyor is now
unjammed.
Troubleshooting
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