Operating Modes; Normal; Hdo; Eco - Dražice OKHE 80-SMART Operating And Installation Manual

3.1 OPERATING MODES

3.1.1 NORMAL

Mode in which the controller keeps the heater at constant, user defined temperature in the range between
5 to 65°C. A standard thermostat function – keeps the heater constantly warmed up to the set
temperature, same as the existing capillary thermostats.

3.1.2 HDO

The controller keeps the heater at constant, user defined temperature in the range between 5 až 65°C only
when low electricity tariff is detected.

3.1.3 ECO

Same function as in the NORMAL mode, just the maximum reachable temperature is limited to 55°C.

3.1.4 SMART

In this mode the controller passes through two phases in order to save at least 10% of electric power,
comparing to the NORMAL mode. In the first phase (learning mode – only the SMART + NORMAL symbols
are shown on the display) constant temperature of the heater is maintained in one calendar week, and the
control electronics monitors the user's behaviour in terms of water consumption. This information is
recorded and subsequently processed. In the second phase (which starts the following calendar week) the
controller applies the information obtained in the first phase and prepares only such amount of water that
user consumes in relevant time, leaving a certain reserve for case of unexpected water withdrawal. In this
phase water consumption data are collected and evaluated. The obtained information is applied in such
manner to adapt continuously to user's requirements. During this mode, minimum temperature is
maintained automatically at 45°C.
If, during the learning mode (the first 7 days) electricity dropout occurs, the learned data on
hot water consumption will be lost. After electricity re-connection the learning mode is
restarted and new data collected for another 7 days. When this period elapses, the collected
data are kept in the appliance memory and potential electricity dropout will not cause loss
of them.

3.1.5 SMART HDO

The boiler operates in HDO mode but if it detects that the heated water was not used in a day, the
following day it will reduce the temperature automatically. On the contrary, if all the warmed water was
consumed, it increases the temperature and this process is repeated until the heat accumulated in the
heater equals the consumption.

3.1.6 PROG/ANTIFROST

The mode of putting the heater out of operation (holiday programme). Makes sure that the temperature of
water in the heater does not drop below 5°C (electricity supply is necessary).

3.1.7 STOP

Function for switching off the heater. In this mode, the heating element cannot be switched on. Also the
ANTIFROST function is eliminated.
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