8 Maintenance
8.1 General
Caution
Maintenance work must be carried out by a qualified professional.
Caution
Do not neglect the maintenance of the domestic hot water tank.
Contact a qualified professional or take out a maintenance con
tract for the annual servicing of the domestic hot water tank.
Caution
Only genuine spare parts may be used.
8.2 Standard inspection and maintenance operations
8.2.1 List of standard maintenance operations to be performed
An annual inspection with tightness check is obligatory.
Schedule servicing of the domestic hot water tank at the same time as the
boiler.
1. Check the safety valve or unit.
2. Check the magnesium anode.
3. Descale the domestic hot water tank.
For more information, see
Checking the safety valve or unit, page 28
Checking the magnesium anode, page 28
Descaling the domestic hot water tank, page 28
8.2.2 Removing and remounting the inspection hatch
Removing the inspection hatch
1. Shut off the domestic cold water inlet.
2. Open a hot water tap.
3. Drain the domestic hot water tank by opening the drain valve.
4. Remove the insulated cover.
5. Remove the inspection hatches.
Fig.20 Draining the DHW tank
MW-C004494-1
3
8 Maintenance
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