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Id.Nr.:243701-0
16. INSPECTION, SERVICING, MAINTENANCE
a) During heating-up excess water must be seen to drip out of the safety valve
outlet (in the case of non-pressure connections the excess water will drip out of
the mixer unit valve). When fully heated up (c. 85°C), the excess water volume is
c. 3.5% of the storage tank volume.
The function of the safety valve should be checked regularly. When lifting or turning the safety
valve testing knob to the "Test" position the water must flow unhindered out of the body of the
safety valve and into the drainage funnel.
Caution: the cold water inlet plumbing and parts of the storage tank connection fittings can
become hot as a result.
If the water heater is not heated up or if no hot water is abstracted, there should be no water
dripping out of the safety valve. If this is the case then either the water feed pressure is too high
(install via 5.5 bar pressure reduction valve) or the safety valve is defective. Please called the
installation expert immediately!
b) In the case of extremely hard water, the boiler scale accumulating in the storage tank's inner
boiler as well as the freely deposited lime-scale must be removed by a professional after one or
two years of operation.
Cleaning is carried out by removing the flange opening of the heating flange and cleaning the
storage tank. When re-installing the heating flange it is crucial to use a new seal. The specially
enamelled inner container of the water heater must not come into contact with boiler scale
solvent - do not use the de-calcifying pump. Remove limescale with a wooden instrument and
then take out with a vacuum cleaner, or wipe it out with a cloth.
Afterwards the device must be thoroughly rinsed (in accordance with ÖNORM H5195-1) and the
heating up process is to be observed as per initial commissioning.
c) The protective current resistor below the heating element fixing screw must not be damaged or
removed during servicing.
d) Do not use any scouring agents to clean the device and do not use any paint thinners (such
as Nitro, trichloride, etc.) It is best to clean it using a damp cloth with a few drops of a liquid
household cleaning agent. In hospitals and other public buildings, the prevailing regulations for
cleaning and disinfection must be observed.
17. MALFUNCTIONS
If the storage tank water does not heat up please check whether the circuit breaker (automatic circuit
breaker) in the distribution cabinet or the safety fuse have been tripped and check the setting of the
temperature regulator. In any other instances do not attempt to rectify the fault yourself. Either contact
a licensed installer or our Customer Service department for assistance. Professionals often only need
to make a few quick adjustments to return the storage tank to full working order. Please provide the
type designation and serial number of your storage tank when reporting the issue, which you will find
on the rating plate.
