6.2.2.
Replacing the magnesium anode and
descaling
Have a lip gasket and a retainer ring on hand for the
inspection hatch.
1. Turn off the domestic cold water inlet.
2. Open a hot water tap.
3. Open the valve on the safety unit.
4. Remove the cover
A
using a broad-bladed screwdriver (see detail)
and then remove the insulation.
5. Remove the sensor
B
from the sensor tube in the inspection trap
C
.
6. Remove the inspection trap (13 mm spanner).
7. Drain the calorifier.
8. Check the condition of the anode
D
. Replace if necessary.
9. Check the extent of scaling in the tank and on the exchanger.
Remove limescale deposits in the form of sludge or strips in the
bottom of the tank. On the other hand, do not touch limescale
adhering to the walls of the tank as it provides effective protection
against corrosion and improves the insulation of the DHW
calorifier.
10.Replace the
E
lip
F
retainer ring. Place the positioning
lug on the gasket toward the outside of the tank.
CAUTION
Each time it is opened, the lip retainer ring unit
must be replaced to guarantee tightness.
11.Then replace all the parts in reverse order.
CAUTION
The screws retaining the visit trap must be tightened to
6 N·m +1/-0. Use a torque wrench. Approximately 6 N·m
is obtained by manipulating the box spanner with the small
lever and 15 N·m by manipulating it with the large lever.
12.Check for leak tightness after assembly.
6.3
Safety valve or safety unit
The safety valve or unit on the domestic cold water inlet must be
operated at least
once a month
to ensure proper operating and to
prevent from any overpressure which may that may damage the
domestic hot water calorifier.
WARNING
Failure to abide by this maintenance rule may damage the
domestic hot water calorifier and void its warranty.
8
9
5
3
N
1
4
7
-D
SR130
6. Checking and maintenance
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