Replacing the inspection hatch
1. Replace the lip retainer ring and place it in the inspection
opening, taking care to position the tab on the lip gasket outside the
domestic hot water tank.
Caution
Each time it is opened, the lip retainer ring unit must be
replaced to guarantee tightness.
2. Remount the unit.
Caution
Use a torque wrench no. 13.
The retaining screws on the inspection hatch must not be over
tightened. Torque: 6 N·m +1/-0
Note
Approximately 6 N·m is obtained by holding the box spanner by
the small lever.
3. Close the valves.
4. After reassembly, check the tightness of the side flange.
5. Proceed with commissioning.
For more information, see
Commissioning the domestic hot water tank, page 26
8.2.3 Checking the safety valve or unit
The safety valve or unit on the domestic cold water inlet must be operated
at least once a month in order to ensure that it works properly and take
precautions against possible pressure surges which would damage the
domestic hot water tank.
Caution
Failure to follow this maintenance requirement may lead to the de
terioration of the domestic hot water tank and void its warranty.
Caution
The outlet pipe in the safety valve or unit must not be blocked.
For more information, see
Removing and remounting the inspection hatch, page 27
8.2.4 Checking the magnesium anode
Check the condition of the anodes at the end of the first year. Determine
the periodicity of subsequent checks after the first check, according to the
wear and tear on the anodes. Magnesium anodes must be checked at
least every 2 years.
1. Remove the inspection hatches.
2. Descale the domestic hot water tank if necessary.
3. Measure the diameter of the anode. Replace the anode if its diame
ter is less than 15 mm.
4. Reassemble the anode/inspection hatch unit.
For more information, see
Removing and remounting the inspection hatch, page 27
Descaling the domestic hot water tank, page 28
8.2.5 Descaling the domestic hot water tank
In hard water regions, annual descaling of the appliance is recommended
in order to maintain its performance.
Fig.21 Replacing the lip gasket
MW-4000094-1
13
Fig.22 Checking the magnesium anode
Ø >
15 mm =
Ø <
15 mm =
MW-C003699-4
7
8 Maintenance
28
EL 110 SL
7626247 - v03 - 29042016
