18
Installation and maintenance instructions Logalux ST400/3, 500/3, 750/3 and 1000/3 "US" • Issue 07/2005
We reserve the right to make any changes due to technical
Maintenance
8
8.4.1 Checking magnesium anode with a
multimeter on annual basis
Proceed as follows to check the magnesium anode:
z
Disconnect ground wire (Fig. 19,
Item 3
) on the
magnesium anode or on the DHW tank.
z
Set multimeter to DcmA (milliamperes).
z
Connect black multimeter measuring wire (Fig. 19,
Item 6
) to the threaded pin on the DHW tank (Fig. 19,
Item 7
).
z
Connect red multimeter measuring wire (Fig. 19,
Item 5
) to the magnesium anode.
z
Make sure that all connections have good metal-to-
metal contact.
z
If the anode current is 0.3 mA to 30 mA, the anode is
working correctly.
z
Note the annual measurements in Table 3.
Enter the measured values into the table:
z
Reconnect the wiring after every test.
Fig. 19
Check magnesium anode with multimeter
Item 1:
Magnesium anode
Item 2:
M8 threaded pin
Item 3:
Ground wire
Item 4:
Access port cover
Item 5:
Red multimeter measurement wire
Item 6:
Black multimeter measurement wire
Item 7:
Threaded pin on DHW tank
Item 8:
Digital multimeter
2
1
3
4
6
7
5
8
USER NOTE
The DHW tank must be full of water while
testing the anode.
Date
Measurement Service Company/Signature
7DE 0HDVXUHPHQWUHVXOWV
USER NOTE
If the anode current changes by none than
10 % (up or down) from the previous test,
open up tank access cover and visually
inspeet the anode rod.