Checking The Flue Gas Temperature; Displaying The Ionisation Current; Shutting Down The System; Opening The Boiler Door - Viessmann Vitocrossal 200 Service Instructions For Contractors

Commissioning, inspection, maintenance

Checking the flue gas temperature

Enter actual value into the report in the appendix.

Displaying the ionisation current

Note
The ionisation current must be called up via the burner
control unit. It is not possible to measure the ionisation
current using the Testomatik-Gas or a multimeter.
01. Press S approx. 2 s , " " flashes.
02. Press until "5" is shown under Service.
03. Press S. "5" will be displayed under Status.
04. Press until "3" is shown under Service.
05. Press S. "3" is shown under Status, and during
operation the ionisation current is shown under
Service (e.g. 30 = 3.0
06. Start the burner with the emissions test switch.
07. Read the ionisation current.
Note
The ionisation current should be at least 3
approx. 2 to 3 s after the gas train has been
opened and during operation.

Shutting down the system

1. Switch OFF the mains isolator or the power supply,
and safeguard against unauthorised reconnection.
Danger
Mains voltage can be life threatening.
For maintenance work, isolate the system
from the power supply.
2. Remove the burner hood.

Opening the boiler door

1. Remove the gas supply pipe.
2. If required, remove the ventilation air pipe.
3. Undo 7 screws on the boiler door and open.
Note
Prevent the boiler door from slamming shut.
20
A).
µ
A for
µ
08. Record the actual value in the report.
09. Press S approx. 2 s , " " flashes.
10. Press until "5" is shown under Service.
11. Press S. "5" will be displayed under Status.
12. Press until "0" is shown under Service.
13. Press S. The operating display will be shown
again.
3. Disconnect burner cables with plugs
from the burner control unit. Route the burner
cable out of the burner casing.
4. Unplug the cables from the burner control unit as
necessary.
5. Close the gas shut-off valve.
!
Please note
Scratches inside the combustion chamber can
lead to corrosion.
Never place tools or other objects inside the
combustion chamber.
and
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