DORCHESTER DR-RS 105, Инструкция по установке, наладке и обслуживанию

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Maintenance
60 Instruction manual DR-RS
9
s
9.3 Water-side mainte-
nance
9.3.1 Introduction
The following steps should be carried out on the water side:
1.
Checking the anodes .
2. Descaling and cleaning the heater .
9.3.2 Checking the anodes
Timely replacement of the anodes extends the service life of the water heater.
The water heater’s anodes must be replaced as soon as they are 60% or more
used up (take this into consideration when determining the maintenance
frequency).
1. Remove the chimney attachments from the top box.
2. Detach the lid of the top box.
3. Detach the fan leads and remover the lead from the strain relief.
4. Undo the screws of the top box.
5. Remove the top box from the water heater.
6. Undo the screws of the cover on the top of the water heater.
7. Remove the cover from the water heater.
8. Remove the sealing ring from the hot water tank.
9. Loosen the anodes using suitable tools (27 mm A/F).
10. Check the anodes and if necessary, replace them.
11. Now also check the flue baffles. Replace them, if necessary. See paragraph
9.4.4 Checking the flue baffles .
12. Fit a new sealing ring around the edge of the hot water tank and replace the
cover.
13. Replace the top box.
14. Feed the fan lead through the strain relief and connect the lead to the fan.
See appendix A Electrical diagram DR-RS .
15. Fit the lid back on the top box.
9.3.3 Descaling and cleaning the heater
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
O
c is recommended for prevention of excessive scale buildup.
To guarantee a good, watertight seal around the cleaning opening, the gasket ,
O-ring
g
, spring washers, bolts and if necessary, the lid
c
should be replaced
with new parts before reassembly. See Figure 9.1 . A special set is obtainable
from Hamworthy for this purpose.