4. Remove limescale deposits from the bottom of the tank.
5. Replace the inspection hatch.
6. Fill the domestic hot water tank.
For more information, see
Draining the domestic hot water tank, page 48
Removing the inspection hatch, page 49
Replacing the inspection hatch, page 50
10.5.4 Checking the magnesium anode
Check the condition of the magnesium anode after the first year of use,
and then every two years. If the magnesium anode wears in less than two
years, increase the checking interval.
The condition of the magnesium anode can be checked using one of the
two following methods:
Visually checking the magnesium anode,
Electrically checking the magnesium anode.
Visually checking the magnesium anode
It is necessary to drain the domestic hot water tank in order to visually
check the magnesium anode.
1. Drain the domestic hot water tank.
2. Remove the inspection hatch.
3. Measure the diameter of the anode.
4. Replace the anode if its diameter is less than 15 mm.
5. Replace the inspection hatch.
For more information, see
Draining the domestic hot water tank, page 48
Removing the inspection hatch, page 49
Replacing the inspection hatch, page 50
Check the current of the magnesium anode
It is not necessary to drain the domestic hot water tank in order to carry
out an electrical check of the magnesium anode. However if it is
necessary to replace the magnesium anode, it will first be necessary to
drain the domestic hot water tank.
1. Remove the lower cover of the domestic hot water tank.
2. Unclip the anode wire from the magnesium anode.
3. Measure the current between the hot water tank and the magnesium
anode.
4. If the measured current is less than 0.1 mA:
4.1. Drain the domestic hot water tank.
4.2. Remove the inspection hatch.
4.3. Replace the magnesium anode.
5. Replace the inspection hatch.
For more information, see
Draining the domestic hot water tank, page 48
Removing the inspection hatch, page 49
Replacing the inspection hatch, page 50
10.5.5 Replacing the inspection hatch
Provide a new gasket each time the inspection hatch is opened, to
guarantee tightness.
Fig.52
Ø >
15 mm =
Ø <
15 mm =
MW-C003699-1
10 Maintenance
50
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