KEY RK-2001W2N, Operation Manual, Page: 5 / 16

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Table 1. User parameters list.
Disp. Parameter Min Max Step Factory
default
C 45 Boiler desired temperature. L 45 H 85 1°C L 45
co C Central heating pump work when „C” (pump off when „-”). - C C
cu u Heating up „d” - total bacteria control in hot water tank. u d u
50°C Water temperature in hot water tank.
End Exit from user mode.
4.1. Boiler water temperature.
The desired boiler temperature [C 45] – is the temperature which the controller will
try to achieve in WORK mode. It is set by direct turning of the knob and is indicated by
a short display.
4.2. Central heating pump work [co C] – WINTER/SUMMER mode – character „C”
indicates that the central heating pump is working. In summer time the heating can be
turned off by choosing the value “-“ with the (-) button which means turning off the
central heating pump.
4.3. Total bacteria control in the hot water tank [cu u] – heating up - the controller
allows to manually launch the total bacteria control process in which the boiler reaches
the temperature of 75°C in the hot water tank. In order to start the total bacteria control
process the boiler should be in WORK mode (this mode can be turned on by START
button). E.g. [70°d] will appear on the display. After reaching 75°C in the hot water
tank the controller will return to its state before choosing this option.
CAUTION: the total bacteria control function can switched on at night when the water
from the hot water tank is not used to prevent the users from burn injury.
4.4. Water temperature readout in hot water tank [ 50°] – this parameter shows the
measured temperature value in the hot water tank.
4.5. Exit from user mode – choosing the [End] on the display and pressing OK
button causes exit from the parameter setting. Exit from this mode will also occur if no
button is pressed for 1 minute.
5. Parameter setting – the service mode.
Holding OK button for more than 3 seconds enters the service mode where you can
review and change the parameters. It is indicated by flashing of the room thermostat
indicator. You can look through parameters with < and > arrow buttons. After choosing
the desired parameter (indicated by value of the parameter flashing slowly) you can
change the parameter value directly by turning the knob. The change of the value is
indicated by this value flashing. The change of the value will occur after pressing
– or + button. Pressing OK button will confirm the changes. After that the controller
allows to choose another parameter with < > buttons. If you do not want to change the