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Caution! In doing so, the cold water supply pipe and the connection fitting of the tank may get
heated! If the hot water heater does not work, or if hot water is not withdrawn, no water shall
drip off the safety valve. If water drips, then the pressure in the supply piping is either too high,
or the safety valve is defective. Please call a specialized plumber immediately!
If water contains too many minerals, an expert has to come to remove the scale that forms inside
the tank, as well as free sediments. This has to be performed after one or two years of operation.
The cleaning is carried out through the hole in the flange - dismantle the flange lid and clean
the tank. A new sealing has to be used for re-fitting. Since the inside of the heater has special
enamel, which must not get in contact with the scale removing agent - do not work with a lime
pump. Remove the lime layer with a timber and suck it off or wipe it off with a clout. After that,
the appliance must be rinsed thoroughly, and the heating process is checked the same as during
the initial putting in operation. Do not use any abrasive cleaning agents (such as liquid sand,
chemicals - acid, alkaline) or dye thinners (such as cellulose thinner, trichlor, and the like)
to clean the outer shell of the heater. For cleaning use a wet clout and add a few drops of liquid
cleaning agent for household applications. Repeated heating causes lime scale settling on the
receptacle walls and mostly on the lid of the flange. Lime scale settling depends on hardness of
heated water, its temperature and on the volume of hot water used.
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. If the anode is only blocked with sediments clean its surface and, if used up, mount
a new one. Have a company in charge of service affairs deal with the cleaning and exchanging
of the anode. When draining water from the heater, the combination faucet valve for hot water
must be open, preventing occurrence of under-pressure in the heater tank which would stop
the water from draining.
MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES
FAILURE SYMPTOM
Temperature of water is not
corresponding with the set value
Water is constantly dripping off
the safety valve
Do not attempt to repair the failure yourselves. Seek either expert or service help. It does not
take much for an expert to remove the defect. When organizing a repair, state the model
designation and the serial number that is to be found on the power plate of your water heater.
INDICATOR
•
LED is not on
Table 11
SOLUTION
•
Defective thermostat
•
High input pressure
•
Defective safety valve
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