Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors page 22

Commissioning, inspection, maintenance
Checking the CO
Gas type CO
at
lower heating output
(0 %)
Natural gas K upper heating output
(G25.3) NL only (100 %)
lower heating output
(0 %)
Natural gas Lw (G27) upper heating output
PL only (100 %)
lower heating output
(0 %)
Natural gas S upper heating output
(G25.1) HU only (100 %)
lower heating output
(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 per-
2
missible CO content, see the table on page 21.
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. 18
22
content
(cont.)
2
content
2
in small
A
content is
2
CO content drops
2
CO content increases
→
2
Rated heating output in kW
400
1.6 - 2.0 % 1.6 - 2.0 %
7.3 - 9.7 % 7.3 - 9.7 %
Actual value at upper heating output minus
0.6 - 0.9 % 0.6 - 0.9 %
7.7 - 9.7 % 7.7 - 9.7 %
Actual value at upper heating output minus
0.6 - 0.9 % 0.6 - 0.9 %
9.8 - 10.9 % 9.8 - 10.9 %
Actual value at upper heating output minus
0.6 - 0.9 % 0.6 - 0.9 %
4. Record the actual value in the report (on
page 62).
Status Service
S
Fig. 19
1. Press until the service indicator has counted
down to "0" (lower heating output).
2. Check the CO content at the flue pipe.
2
500
1.6 - 2.0 %
7.3 - 9.7 %
0.6 - 0.9 %
7.7 - 9.7 %
0.6 - 0.9 %
9.8 - 10.9 %
0.6 - 0.9 %
R
620