Drazice 250 Manual de funcionamiento e instalación - Página 15
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2.5 HEATER CLEANING AND ANODE ROD EXCHANGE
Repetitive water heating causes limestone sediment on both the enamelled tank walls and chiefly the
flange lid. The sedimentation depends on the hardness of water heated, its temperature, and amount of
hot water consumed.
We recommend checking and cleaning the tank from scale and eventual replacement of
the anode rod after two years of operation.
The anode life is theoretically calculated for two years of operation; however, it changes with water
hardness and chemical composition in the place of use. Based on such an inspection, the next term of
anode rod exchange may be determined. Have the company in charge of service affairs clean and exchange
the anode. When discharging water from the heater, the combination faucet hot water valve must be open
in order to avoid creating underpressure that would prevent water discharge.
To prevent the occurrence of bacteria (e.g. Legionella pneumophila) within stack heating it
is recommended, if absolutely necessary, to increase the temperature of hot service water
(HSW) periodically for a transitional period of time to at least 70°C. It is also possible to
make use of another way of disinfecting HSW.
2.6 SPARE PARTS
- Magnesium anode
- contact thermometer
When ordering spare parts, give part name, type, and type number from the heater label.
3 IMPORTANT NOTICES
3.1 IMPORTANT NOTICES
Without a proof issued by a professional company about performed electrical and
plumbing fixture the warranty shall be void.
It is necessary to check the protective magnesium anode periodically and replace it if
necessary.
No stop valves can be put between the heater and the safety valve.
All outlets of hot water must be equipped with combination faucets.
Before the first filling of water heater it is recommended to tighten the nuts of the flange
joint of the tank..
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