Viessmann Vitodens 222-F Installation And Service Instructions For Contractors page 45

Checking the combustion quality
If the actual CO or O values lie outside their respec-
2 2
tive ranges, proceed as follows:
■ Check the balanced flue system for tightness; see
page 34.
■ Check the ionisation electrode and connecting cable;
see page 37.
Note
During commissioning, the combustion controller car-
ries out an automatic calibration. Allow approx. 30 s
after the burner has started before testing the emis-
sions.
A
Fig. 39
Select higher/lower heating output
Weather-compensated control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
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2. "Actuator test"
3. Select the lower heating output:
Select "Base load OFF". Then "Base load ON" ap-
pears and the burner operates at its lower heating
output.
4. Select the upper heating output:
Select "Full load OFF". Then "Full load ON" ap-
pears and the burner operates at its upper heating
output.
5. Ending output selection:
Press .
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Checking the flue system for unrestricted flow and tightness
Checking the external LPG safety valve (if installed)
Commissioning, inspection, maintenance
(cont.)
1. Connect a flue gas analyser at flue gas port
the boiler flue connection.
2. Open the gas shut-off valve, start the boiler and
create a heat demand.
3. Select the lower heating output (see page 45).
4. Check the CO content. Should the actual value
2
deviate from the aforementioned ranges by more
than 1 %, implement measures detailed on
page 44.
5. Enter the actual value into the report.
6. Select the upper heating output (see page 45).
7. Check the CO content. Should the actual value
2
deviate from the aforementioned ranges by more
than 1 %, implement measures detailed on
page 44.
8. After testing, press OK.
9. Enter the actual value into the report.
Constant temperature control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
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2. Select " " with and confirm with OK.
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The display shows "I" and "ON" flashes.
3. Select the lower heating output:
Press OK, "ON" will be displayed constantly.
4. Select the upper heating output:
Press .
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5. Select "2" with ; "ON" flashes.
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6. Press OK, "ON" will be displayed constantly.
7. Ending output selection:
Press .
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A on
45