Checking The Anode Connection And Anode Earth Current With An Anode Tester; Draining The Boiler On The Dhw Side - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Checking the anode connection and anode earth current with an anode
tester
Check that the earth cable is connected to the protec-
tive magnesium anode.
Note
We recommend checking the function of the protective
magnesium anode annually. This function test can be
carried out without interrupting operation, by measur-
ing the earth current with an anode tester.
A
Fig. 39
1. Remove cover (two-part design up to 26 kW).
A
2. Remove earth cable
B

Draining the boiler on the DHW side

46
C B
from tab .
C
3. Connect tester (up to 5 mA) in series between tab
C and earth cable B
■ If the current measures > 0.3 mA the protective
magnesium anode is OK.
■ If the current measures < 0.3 mA or if there is no
current at all, inspect the protective magnesium
anode visually (see page 48).
1. Shut off the DHW supply upstream of the appli-
ance.
.