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Connection of the room thermostat and servicing of the electrical system of the boiler shall only be
carried out by authorized service companies!
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HDO - demand site management
Demand site management (HDO), together with electricity, allows the customers to transmit various
commands concerning the rate changeover on the electricity meter and operation of some appliances via
standard distribution networks. Demand site management is a set of technical means (such as transmitters,
receivers, central automatic systems, transmission routes, etc.) which allow commands or signals to be
transmitted in order to turn appliances on or off. The HDO system replaced the time switch used in the past.
Each customer who uses tariff switching must be equipped with the necessary tariff switching equipment. Such
equipment is situated on the electricity meter panel and cooperates with the electric boiler. HDO receiver is a
device which carries out the required switching operation (e.g. blocks / unblocks the appliance) based on the
evaluated HDO signal.
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Evaluating the HDO signal
The automatic system is factory set in such a way so that the boiler operation does
not require
presence of
the HDO signal. If the HDO signal terminal remains unconnected, the boiler will keep operating this way.
However, if HDO signal is transmitted to the automatic system for more than 5 seconds, the automatic system
will respect it – i.e. the boiler will be working only if the signal is present (the same applies to DHW heating
and antifreeze protection), while if it is not present, boiler operation will be blocked.
The original state when the automatic system does not require the HDO signal for boiler operation can be
restored by entering the boiler type in the service menu.
6.
Boiler operation
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Boiler control panel - description
The user can operate the boiler using the two-digit display, three buttons and 10 LED indicators. With the
control panel, easy intuitive control and display of the boiler functions is possible.
