Viessmann Vitodens 333 Service Instructions Manual page 16

Initial start-up, inspection, maintenance
Further details regarding the individual steps
&
6.6 to 10.0 % for natural gas E
&
7.0 to 10.0 % for natural gas LL and
&
8.5 to 10.5 % for LPG P.
Compare the actual CO
dual gas groups (check the gas group with your mains gas or LPG supplier).
If the actual CO value deviates by more than 1 % for natural gas or 0.5 % for
2
LPG, proceed as follows:
&
Check whether the correct gas restrictor has been installed.
&
Check the balanced flue system for soundness, see page 18.
16
value with the above CO
2
1. Connect a flue gas analyser at flue
gas aperture A on the boiler adap-
tor.
2. Open the gas shut-off valve, com-
mission the boiler and create a heat
demand.
3. Select the lower rated output.
Constant temperature control unit:
&
Weather-compensated control unit:
&
&
4. Check the CO
actual value deviate by more than
1 % from the above range, imple-
ment steps from page 15.
5. Enter actual values into the service
report.
(cont.)
value ranges for the indivi-
2
Press both keys 9 and d simul-
taneously, until the display shows
1.
Press both keys 9 and d simul-
taneously until the display shows
"Relay test".
With a/b in the display, select
"Basic load".
content. Should the
2