Checking The Condensate Drain And Cleaning The Siphon; Testing The Anode Earth Current With An Anode Tester - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Checking the condensate drain and cleaning the siphon

Testing the anode earth current with an anode tester

Note
We recommend that the magnesium anode function is checked annually. This
function test can be carried out without interrupting operation, by measuring the
earth current with an anode tester.
22
(cont.)
1. Check at siphon A, that the con-
densate can freely drain off.
2. Remove the retaining clip and the
siphon.
3. Clean the siphon.
4. Fit the siphon and secure with the
retaining clip.
1. Remove cover A.
2. Pull earth lead B from tab C.
3. Connect the tester (up to 5 mA) in
series between tab C and earth
cable B.
The anode is OK if the indicated
current is > 0.3 mA.
Visually inspect the anode, if the
current measures < 0.3 mA or if
there is no current at all (see
page 23).