KEY RK-2001E2, Operation Manual

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Warning! If neither contact thermostat nor indoor temperature sensor is used, the
connection should be short-circuited.
6. Device failures.
The controller is constantly testing if its internal circuits and temperature sensor are
working correctly. After detection of fault, it stops the pressure fan, turns on the
circulating pump and shows proper error message on the display. In case of failure
please turn off the controller, plug the circulating pump to the power source, bypassing
the controller, ensure appropriate fuel firing in the boiler and contact the service. When
[E 1] error appears on the display, it means fault (short-circuit) in the boiler sensor
circuit or temperature below -9°C. [E 2] is displayed if boiler overheats. [E 3] error
means fault and overheating at the same time. Appearing of [E 1] error on the display
without ability to cancel it by pressing STOP button, in spite of temperature below
90°C, may mean permanent damage of boiler temperature sensor (e.g. if the boiler
overheated above 150°C).
7. Device removal.
In case of need to remove the controller from the system:
– turn the master switch off,
– disconnect the power of the boiler,
– remove the controller from the slot in the boiler,
– disconnect all connectors with cords from the controller.
8. Specifications.
Voltage: 230V ± 10%, 50Hz
Power consumption: <4VA
Temperature measurement range: -9–109°C ± 1°C
Boiler temperature adjustment range: 30–90°C ± 1°C
Programmable boiler overheating protection: 90 –99°C ± 1°C
Hardware boiler overheating protection: >95°C ± 1°C
Circulating pump launch temperature: 30–70°C ± 1°C
Fan out: total max 2A/230V
Dimensions: 80 x 170 x 100 mm