Viessmann VITODENS 333-F WS3A Service Instructions Manual page 26

Commissioning, inspection, maintenance
Further details regarding the individual steps
1. Connect a flue gas analyser at test
port A (on the boiler flue outlet).
2. Open the gas shut-off valve, start
the boiler and create a heat
demand.
3. Select the lower output.
Constant temperature control
unit:
K + d press simultaneously:
"1" is shown.
Weather-compensated control
unit:
K + d press simultaneously:
"Relay test" and then
"Base load" is shown.
26
(cont.)
4. Check the CO content. If the value
2
lies outside the above range, take
the measures listed on page 25.
5. Record the actual value on
page 118 of commissioning/service
report.
6. Select the upper output.
Constant temperature control
unit:
K + d press simultaneously:
"1" is shown.
a press:
"2" is shown.
Weather-compensated control
unit:
K + d press simultaneously:
"Relay test" is shown.
a press:
"Full load" is shown.
7. Check the CO content. If the value
2
lies outside the above range, take
the measures listed on page 25.
8. After testing, press d.
9. Record the actual value on
page 118 of commissioning/service
report.