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Instruction manual BFM 65
s
12.3.3 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.
3. Undo the bolts.
4. Remove the lid, the gasket and the O-ring.
5. Inspect the tank and remove the loose scale deposits and contamination.
6. If the scale cannot be removed by hand, descale the appliance with a
descaling agent. Contact the supplier/manufacturer for advice on what
descaling agent to use.
2
6
7
1
4
5
3
IMD-0235 R2
65


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