Operation Manual

14
When the water heater is not in use for a longer period of time and is switched off or
disconnected from the power supply, it must be emptied in case of danger of freezing.
Water from the heater is drained through the inlet pipe of the heater. For this purpose, a
special fitting (T-fitting) must be mounted between the relief valve and the heater inlet pipe,
or a discharge tap. The heater can be discharged directly through the relief valve, by
rotating the handle or the rotating valve cap to the same position as for checking the
operation. Before discharge, make sure the heater is disconnected from the power supply,
and open the hot water on the connected mixer tap. After discharging through the inlet
pipe, there is still some water left in the water heater. The remaining water will be
discharged after removing the heating flange, through the heating flange opening.
The external parts of the water heater can be cleaned with a mild detergent solution. Do
not use solvents and abrasives.
Regular preventive maintenance inspections ensure faultless performance and long life of
your heater. The first of these inspections should be carried out by the authorised
maintenance service provider about two years from installation in order to inspect the wear
of the protective anticorrosion anode and remove the lime coating and sediment as
required. The lime coating and sediment on the walls of the tank and on the heating
element is a result of quality, quantity and temperature of water flowing through the water
heater. The maintenance service provider shall also issue a condition report and
recommend the approximate date of the next inspection.
Never try to repair any possible faults of the water heater by yourself, but inform
about it the nearest authorised service workshop.
EN