hajdu SMART Series Installation And Owner's Manual page 36

Z30 SMART • Z50 SMART • Z80 SMART Z120 SMART
9.1 Combined safety valve
Before putting into use, check if the outlet of the valve is blocked, and if flow
towards the open airspace is ensured during the operation of the valve. Outlets
must look downwards.
At least every two months, blow off the valve by turning the blow-off button of the
safety valve in the direction indicated by the arrow. This will clean the valve seat of
any possible sand deposit, preventing its adhesion. The leakage of the valve while
in operation is a functional phenomenon. If the leakage does not stop when the
heating is switched off, have the appliance checked by a technician. In such cases,
you are advised to request the annual inspection of the product.
9.2 Discharging of water from the container
When discharging water, hot water may leave the appliance.
After disconnecting the container, the discharging of water can be performed via
the outlet by turning the blow-off knob of the combined safety valve in the
direction indicated by the arrow. Before discharging water, close the closing valve
of the water network, and the cold water tap, but leave the hot water tap open
throughout the time of discharging.
9.3 Descaling
Depending on the quality of water, scale may
deposit on the radiator and the tank. Scale
depositing on the radiator increases energy
consumption and the risk of radiator failure,
whereby descaling should be performed every
two years. Since intensive scaling may cause
damage to the heater, check the radiator for
integrity too. Descaling requires the emptying
of the tank, the disconnection of the electrical
circuit and the removal of the service cover.
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• Z150 SMART • Z200 SMART
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ATTENTION!