Viessmann VITODENS 333 Service Instructions Manual page 23

Further details regarding the individual steps
Checking the condensate drain and cleaning the siphon
Testing anode earth current with an anode test device
Note
We recommend that the magnesium anode function is checked annually. This
function check can be made without interrupting operation, by measuring the
earth current with an anode test device.
Initial start-up, inspection, maintenance
(cont.)
4. Check the gas connections for
soundness.
Danger
Escaping gas leads to a risk
of explosion.
Check all fittings for sound-
ness.
5. Connect the electrical cables/leads
to each corresponding component.
1. Check at siphon A, that the con-
densate can freely drain.
2. Remove the retaining clip and the
siphon.
3. Clean the siphon.
4. Fit the siphon and secure with the
retaining clip.
23