Testing The Anode Earth Current With An Anode Tester; Cleaning The Primary Cylinder - Viessmann Vitodens 333-F Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

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.

Cleaning the primary cylinder

Note
EN 806 specifies a visual inspection and (if required) cleaning every two years
after the cylinder has been taken into use and thereafter according to require-
ments.
26
(cont.)
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 27).