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Instruction manual ADMR 81
s
4. Disconnect the draught diverter from the flue gas discharge.
5. Undo the screws on the draught diverter.
6. Remove the draught diverter from the appliance.
7. Undo the screws of the lid in the top side of the appliance.
8. Remove the lid from the appliance.
9. Remove the sealing ring from the appliance.
10. Now also check the flue baffles (15.4.3 "Checking the flue baffles")
. If
necessary, replace them.
11. Place a new sealing ring on the rim of the tank and re-fit the lid.
12. Fit the draught diverter (3.9.2 "Fitting the draught diverter").
13. Fit the flue damper (3.9.3 "Fitting the flue damper")
.
14. Fit the flue gas sensor (3.9.4 "Fitting the flue gas sensor")
.
15. Re-fit the protective cover.
15.3.3 Descaling and cleaning the tank
Scale and lime buildup prevent effective conduction of the heat to the water.
Periodic cleaning and descaling prevents buildup of these deposits. This
increases the service life of the appliance, and also improves the heating
process.
Take the rate of scale formation into account when deciding on maintenance
frequency. Scale formation depends on the local water composition, the water
consumption and the water temperature setting. A water temperature setting of
maximum 60 °C is recommended for prevention of excessive scale buildup.
To ensure the perfectly watertight sealing of a cleaning opening, the gasket (6),
O-ring (7), sealing rings (4), bolts (3) and possibly the lid (5) should be replaced
with new components after opening (see the figure). A special set is obtainable
from the supplier/manufacturer.
To simplify the task of descaling and cleaning the tank, the appliance is
equipped with two cleaning openings.
1. Remove the cover plate (1) on the outer jacket (see the figure).
2. Carefully remove the insulation layer (2) and set it to one side. This will be
needed again later.
2
6
7
1
4
5
3
IMD-0235 R2
81


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