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2.8 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE
During the heating process the water that increases its volume during the heating must drip
off the safety valve outlet (in non-pressurised connection this water drips off the
combination faucet valve). In full heating (about 65
3% of the tank capacity. The function of the safety valve has to be checked regularly (based
on the information contained in the attached safety valve manual). In common operation,
such a check needs to be implemented at least once a month, and after each heater
shutdown that exceeds 5 days.
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 If the hot water heater does not work, or if hot water is not withdrawn, no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 specialised 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. 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 lime 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 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 the occurrence of under-pressure in the heater tank which would stop
water from draining. Cleaning is carried out through the hole in the flange by: draining the
boiler, dismantling the flange lid and cleaning the tank. A new sealing has to be used for re-
fitting. Since the inside of the heater has special enamel, the surface of which must not get in
contact with a 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 or dye thinners to clean the outer shell of
the heater (such as cellulose thinner, trichlor, and the like). For cleaning use a wet clout and
add a few drops of liquid cleaning agent for household applications.
o
C) the volumetric water gain is approx.
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