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14
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2.7
INSPECTION, MAINTENANCE & CARE FOR TH
E 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
o
C) the volumetric water gain is approx.
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 regular operation,
such a check needs to be
carried out at least once a month and then after each shutdown of
the tank that lasts over 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 tank is not in run, or hot water is
not consumed, no water may
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 tank, the combination faucet valve for hot water must be
open, preventing the occurrence of under
-
pressure in the tank receptacle 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 tank has special enamel the surface of 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 or dye thinners (such as
cellulose thinner, trichlor, and the like) to clean the outer shell of the tank.
For cleaning use a
wet clout and add a few drops of liquid
cleaning agent for household applications.
