A.O. Smith BFM - 100, Инструкция по установке и обслуживанию

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Performing maintenance
64 Instruction manual BFM
12
s
12.3 Water-side mainte-
nance
12.3.1 Introduction
The following steps must be carried out on the water side:
1.
Checking the anodes .
2. Descaling and cleaning the tank .
12.3.2 Checking the anodes
Timely replacement of the anodes extends the service life of the appliance. The
appliance's anodes must be replaced as soon as they are 60% used or more
(take this into consideration when determining the maintenance frequency).
1. Remove the chimney flue components from the top box.
2. Remove the cover from the top box.
3. Disconnect the fan leads and withdraw the cable through the strain relief.
4. Undo the screws in the top box.
5. Remove the top box from the appliance.
6. Undo the screws of the lid in the top side of the appliance.
7. Remove the lid from the appliance.
8. Remove the sealing ring from the appliance.
9. Loosen the anodes using suitable tools.
10. Check the anodes, and if necessary, replace them.
11. Now also check the flue baffles
(12.4.4 "Checking the flue baffles") . If
necessary, replace them.
12. Place a new sealing ring on the rim of the tank and re-fit the lid.
13. Re-fit the top box.
14. Feed the fan cable through the strain relief and connect the leads to the fan.
See addendum A: BFM electrical diagram.
15. Re-fit the cover on the top box.
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.