Viessmann MatriX Service Instructions For Contractors page 12

Commissioning, inspection, maintenance
Checking the CO
2. Start the burner with the emissions test switch ena-
bled.
CO test at the upper heating output
2
1. Press and hold until the service display has
F
counted up to "100" (= 100 %).
2. Check the CO content in the flue pipe.
2
Burner output in kW
187
248
314
CO test at the lower heating output
2
B A
Fig. 9
12
content
(cont.)
2
Permissible CO con-
2
tent in %
9.0 (+0.3/-0.1)
3. Simultaneously press and hold S
longer than 2 s.
Display will then show the following:
C
Under Status: "P" (= controlled stop)
■
Under Service: Modulation level in %
■
("100" = 100 % = upper heating output,
"0" = 0 % = lower heating output)
3. If the CO content needs to be adjusted:
2
Remove cap B and turn setting screw
steps (Allen key 3 mm) until the CO
within the specified range:
Turning clockwise
■ →
Turning anticlockwise
■
4. Record the actual value in the report (on
page 38).
C
D
E
F
Fig. 10
1. Press and hold until the service display has
D
counted down to "0" (lower heating output).
E and D for
A in small
content is
2
CO content drops
2
CO content increases
→
2