Checking The Magnesium Anode; Checking The Upper Magnesium Anode (Su80/5, Su100/5); Checking The Upper Magnesium Anode (Su54/5); Checking The Magnesium Anode At The Side (Su80/5, Su100/5) - Buderus SU54/5 Instrucciones De Instalación Y De Mantenimiento

9.3

Checking the magnesium anode

If the magnesium anode is not serviced properly, the
warranty is void.
Annual service records must be kept in a safe location
and submitted together with the original purchase
receipt in the event of a warranty claim.
The purpose of the anode rod is to protect the DHW tank against
corrosion. It is critical that the anode rod be inspection once a year to
determine whether it requires replacing.
Upon inspection, the anode rod surface should appear smooth. If the rod
surface appears pitted, bumpy, rusty, scale has built up on the surface,
or if the rod is less than 5/8" (15 mm) in diameter, then it must be
replaced.
Certain installations may require more frequent replacement of the
anode rod:
• Recirculation applications,
• Poor water quality,
• Galvanic/electrolytic corrosion,
• High flow applications.
In the event of poor water quality it is recommended that a water
treatment professional be consulted for water treatment options.
Never bring the magnesium anode surface in contact
with oil or grease.
▶ Keep everything clean.

9.3.1 Checking the upper magnesium anode (SU80/5, SU100/5)

▶ Remove PS top cover if not already removed.
▶ Unscrew the magnesium anodes.
▶ Check the magnesium anodes for decomposition.
▶ Replace the magnesium anode if its diameter has been reduced to
approx. 5/8 " (15 mm).
▶ Screw the magnesium anodes back into the cover.
Fig. 20 Checking the upper magnesium anode SU80/5, SU100/5
[1] Hex bolt
[2] Magnesium anode
SU54/5, SU80/5, SU100/5 – 6 720 808 532 (2013/08)

9.3.2 Checking the upper magnesium anode (SU54/5)

▶ Remove the cleanout cover ( Fig. 17, page 14), if not yet removed.
▶ Check the magnesium anodes.
▶ Replace the magnesium anode if its diameter has been reduced to
approx. 5/8 " (15 mm).
▶ To release the ground cable eyelet [8], undo nut M8 [9].
▶ Undo nut M8 [7].
▶ Remove cleanout cover [3] from magnesium anode [1].
▶ Install new magnesium anode with the aid of the hardware provided
( Fig. 21).
Fig. 21 Replacing the magnesium anode
[1] Magnesium anode
[2] Gasket
[3] Cleanout cover
[4] Insulating sleeve
[5] U-washer
[6] Serrated washer
[7] M8Nut
[8] Ground wire eyelet
[9] M8Nut
9.3.3 Checking the magnesium anode at the side
(SU80/5, SU100/5)
▶ Empty the tank as described in chapter 9.1, page 13.
▶ Remove the cleanout cover ( Fig. 17, page 14), if not yet removed.
▶ Check the magnesium anodes.
▶ Replace the magnesium anode if its diameter has been reduced to
approx. 1/2 " (15 mm).
▶ To release the ground cable eyelet [8], undo nut M8 [9].
▶ Undo nut M8 [7].
▶ Remove cleanout cover [3] from magnesium anode [1].
▶ Install new magnesium anode with the aid of the hardware provided
( Fig. 21).
9
Maintenance
6 720 800 155-23.1ITL
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