Checking The Co Content; Checking The Flue Gas Temperature; Displaying The Ionisation Current - Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors

Checking the CO
3. If the CO content needs adjusting:
2
Undo cover and turn setting screw
B
steps (Torx 40) until the CO
specified range:
Turning clockwise
■
→
■ Turning anti-clockwise
4. Record the actual value in the report (on
page 62).
5. Check the CO content at the upper and lower
2
heating output again. If the CO
within the specified range: Repeat the steps for the
upper and lower heating output.

Checking the CO content

Record the actual value in the report (on page 62).

Checking the flue gas temperature

Record the actual value in the report (on page 62).

Displaying the ionisation current

Note
The ionisation current must be called up via the burner
control unit. It is not possible to check the ionisation
current with a Testomatik-Gas or a multimeter.
Press the following buttons:
01. Hold down S for approx. 2 s ; " " flashes.
02. until "5" is shown under "Service".
03. Press S. "5" is displayed under "Status".
04. until "3" is shown under "Service".
05. Press S. The display shows "3" under "Status"
and during operation the ionisation current is
shown under "Service" (e.g. 30 = 3.0
06. Start the burner via menu point Emissions test
mode in the control unit menu.
content
(cont.)
2
in small
A
content lies within the
2
CO content increases
2
CO content drops
→
2
content is not
2
A).
µ
Commissioning, inspection, maintenance
6. Hold down S and simultaneously for longer than
2 s. Burner switches to operating mode.
Note
At the lower heating output, the CO
always be lower than at the upper heating output by a
given amount. See table on page 21.
07. Read the ionisation current.
Note
Approx. 2 to 3 s after the gas train has opened
and during operation, the ionisation current should
be at least 6 A.
µ
08. Record the actual value in the report.
09. Hold down S for approx. 2 s ; " " flashes.
10. until "5" is shown under "Service".
11. Press S. "5" is displayed under "Status".
12. until "0" is shown under "Service".
13. Press S. The operating display will be shown
again.
content must
2
23