Operating Activity; First Commissioning - Drazice OKHE ONE/E 30 Operating And Installation Manual

2.5

OPERATING ACTIVITY

After the heater is connected to the electric network, the heating element starts heating the water. An
electronic thermostat is used to control the temperature and water heating. The thermostat control range
is 0 °C to 77 °C. The temperature is indicated on the display. The thermostat displays the current measured
temperature. Use the control knob to set the desired cut-off temperature. Turn the knob to the right to set
a higher temperature, turn it to the left to set a lower temperature. When the cut-off temperature is set, the
digits on the display are flashing - indicating the user has set the desired temperature. After the desired
temperature has been set, the value remains flashing for 5 seconds, then the current temperature is
displayed. The heating indicator is on the right side of the display. The light indicates heating.
Error, fault messages: E1 - flashing - fault of the temperature sensor (broken sensor, short circuit), indicated
on the display. Water heating is not working during the fault indication.
The round thermostat knob must be handled with care, do not overturn the defined position, and avoid
stronger shocks and impacts.
For long-term operation without use, it is advisable to set the thermostat to the position 5 °C to 10 °C (set
the thermostat control to the "snowflake" symbol) to avoid freezing or turn off the power supply into the
heater. Setting the thermostat to the zero position does not mean the heater has been turned off.
In case of a power failure, the display turns off, it means also when the heating is turned off
according to the HDO signal. The thermostat setting knob is still active, so by turning it you
can change the temperature, which only takes effect when the power is restored.
2.6

FIRST COMMISSIONING

Before opening the power supply, the tank must be filled with water. The process of first heating
must be executed by licensed professional who has to check it. Both the hot water outlet pipe
and safety armature parts may be hot.
During the heating process the pressurized connection water that increases its volume due to
heating must drip off the safety valve. In non-pressurized connection water drips off the
overflow combination faucet. When heating is finished, the set temperature and the actual
temperature of consumed water should be roughly equal. After connecting the heater to the
water main and electrical power system, and after checking the safety valve (following the
instructions attached to the valve), the heater can be put into operation.
Before fist putting into service or after a longer shutdown the appliance has to be rinsed out and
flushed yet before heating is activated. Before heating starts, the tank must be completely filled
with water and the system properly flushed and vented. First heating of the tank has to be
watched.
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