Viessmann CM2B, Инструкции по обслуживанию для подрядчиков

Страница: 18 / 84

18
4. If the CO
2
content needs adjusting:
Turn adjusting screw
A
in small increments. Con-
tinue turning until CO
2
content falls within the
specified range.
■ Turning clockwise
→
CO
2
content falls
■ Turning anti-clockwise
→
CO
2
content rises
Note
The adjusting screw has no end-stop. The starting
position will be reached again after 4 turns.
5. Enter actual value into the report in the appendix.
CO
2
test at the lower heating output (87 kW)
Fig. 11
1. Press until the service display has counted down
to "0" (lower heating output).
2. Check the CO
2
content at the flue pipe.
For permissible CO
2
content, see above table.
Note
At the lower heating output, the CO
2
content must
always be lower than at the upper heating output
by a given amount. See the table above.
3. If the CO
2
content needs adjusting:
■ Undo cover
B
.
■ Turn adjusting screw
A
in small increments
(Torx 40). Continue turning until CO
2
content rea-
ches the specified range:
– Turning clockwise
→
CO
2
content rises
– Turning anti-clockwise
→
CO
2
content falls
4. Enter actual value into the report in the appendix.
5. Check the CO
2
content at the upper and lower
heating output again.
If the CO
2
content is not within the specified range:
Repeat steps for upper and lower heating output.
6. Hold down S and simultaneously for longer than
2 s. Burner switches to operating mode.
Commissioning, inspection, maintenance
Checking the CO
2
content
(cont.)
5812086