22
Id.Nr.: 228843-13
Electric water heater EKA, EKR, EWH, EKL
18. Checking, maintenance, care
a) During heating, the expansion water must drip visibly from the drain of the safety
valve (in case of a pressureless connection, the expansion water drips from the valve
of the mixer tap). If the device is fully heated (approximately 85°C), the volume of the
expansion water is approximately 3.5% of the content of the storage tank.
The function of the safety valve must be checked regularly. When the safety valve
check button is lifted or turned to the “test” position, the water must flow freely from
the body of the safety valve into the drain funnel.
Caution
: The cold water inlet and parts of the storage tank connection fitting may
get hot in the process. If the water heater is not heated, no water should drip from
the safety valve. If water does drip from the safety valve, either the pressure in the
water line is too high (above 5.5 bar: fit a pressure reducing valve), or the safety valve
is defective. Please call the installation expert immediately!
b) If the water is very hard, a professional must remove the limescale forming inside the
interior tank as well as the freely deposited limescale after one to two years of opera-
tion.
For cleaning, it is necessary to open the flange – remove heating flange, clean sto-
rage tank, always use a new sealing when refitting the heating flange. Any contact
between the specially enamelled interior tank of the water heater and boiler scale dis-
solver must be avoided – do not work with the deliming pump. Scrape off deposited
scale with wood and remove with a hoover or wipe with a cloth.
Finally, flush the device thoroughly (according to ÖNORM H5195-1) and observe the
heating procedure as if the device was first-time commissioned.
c) To make a justified claim under the warranty granted by AE-AG, the fitted protective
anode must be checked by a professional at max. 2-year intervals. Do not damage
or remove the protective current discharge resistor underneath the heater fastening
screw during maintenance work.
d) Do not use abrasive cleaning agent and no paint thinners (such as nitro, trichlor com-
pounds etc.) to clean the device.
It is best to clean the device with a moist cloth, adding a few drops of a household
cleaning liquid.
19. Malfunctions
If the water in the storage tank is not heated, please check whether the circuit breaker in
the distributor (MCB) has tripped or whether the fuse has blown. Also check the setting
of the temperature controller.
In all other cases, do not attempt to repair the malfunction yourself. Please contact either
a licensed installation professional or our customer service. Often, a professional will be
able to fix the storage tank in the blink of an eye. When making your call, please always
state the type designation and the serial number. You will find it on the rating plate of your
electric storage tank.
