Checking The Co Content - Viessmann MatriX Service Instructions For Contractors

Checking the CO
Gas type CO
at
Lower heating out-
put (0 %)
CO test at the upper heating output
2
1. Press until the service indicator has counted up
to "100" (= 100 %).
2. Check the CO content at the flue pipe. For the
2
permissible CO content, see the table above.
2
3. If the CO content needs adjusting:
2
Remove cap and turn setting screw
B
steps (Allen key 3 mm) until the CO
within the specified range:
Turning clockwise
■
→
■ Turning anti-clockwise
CO test at the lower heating output
2
B A
Fig. 14
Status Service
R
S
Fig. 15

Checking the CO content

Enter actual value into the report in the appendix.
content
(cont.)
2
content
2
in small
A
content is
2
CO content drops
2
CO content rises
→
2
Commissioning, inspection, maintenance
Rated heating output in kW
400
Actual value at upper heating output minus
0.5 to 0.8 % 0.5 to 0.8 %
4. Enter actual value into the report in the appendix.
5. Checking the control cables
■ Connection and kink-free routing
Application and seating of retaining clips
■
1. Press until the service indicator has counted
down to "0" (lower heating output).
2. Check the CO content at the flue pipe.
2
3. If the CO content needs adjusting:
2
Undo cover . Turn adjusting screw
B
increments (Torx 40) until the CO
the specified range:
■ Turning clockwise
Turning anti-clockwise
■
4. Enter actual value into the report in the appendix.
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.
6. Hold down S and
2 s. Burner switches to operating mode.
Note
At the lower heating output, the CO2 content must
always be lower than at the upper heating output by a
given amount. See table on page 18.
500
0.5 to 0.8 %
in small
A
content is within
2
CO content rises
→
2
CO content drops
→
2
content is not
2
simultaneously for longer than
630
19