KEY RK-2001E2, Operation Manual

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being opened and closed depending on the room thermostat input. Additionally, mixing
valve is opened in case of overheating or boiler temperature sensor malfunction.
[Ar 3] mode – output may control boiler emergency cooling system (e.g. pump). In this
mode the additional output is turned on in case of boiler overheating or boiler
temperature sensor error alarm.
[Ar 4] mode – output may control devices working together with blow-in fan.
CAUTION. Equipment should be connected to additional output using UM-1module.
Connection schemes are shown on picture 3.
4.7. Testing of device's outputs.
To make checking the controller work easier, it is possible to test output circuits which
control the fan and the pump, and the circuit which controls additional boiler. This
function is available in service mode, only if the control process is off, i.e. the controller
was in STOP mode before switching to service mode. By choosing [outP] on the
display and pressing OK button you can turn on the circulating pump for a while, by
choosing [outΠ] and pressing OK you can turn on the pressure fan and by choosing
[outr] and pressing OK you can turn the additional boiler, the alarm signaling system
or the mixing valve servo-motor on (if the additional module is connected).
4.8. Factory defaults.
You can return to standard settings, set by the producer, by choosing [Prod] option in
service mode and pressing OK button. After activating this function, the device sets
each parameter showed in the table to default.
4.9. Exiting service mode.
By choosing [End ] option on the display and pressing OK button you can quit service
mode. The device also quits service mode, when no buttons are pressed for 1 minute.
5. Additional functions.
In order to improve comfort in heated rooms the controller is equipped with indoor
temperature sensor connection. RK-2001E2 compares measured room temperature
with value set with room thermostat knob. When the temperature is lower than desired
temperature circulation pump is turned on and room thermostat indicator is lit, which
means that boiler should keep temperature set with boiler thermostat knob. When
desired room temperature is reached circulation pump and indicator are turned off and
the boiler enters fire keeping mode and works at minimal temperature.
Design of the controller allows connecting any contact thermostat in place of indoor
temperature sensor. Shorting of this thermostat contacts when room temperature is
low will start heating procedure described earlier. When contacts aren't shorted the
controller keeps minimal boiler temperature.
Warning! When contact thermostat is connected in place of indoor temperature
sensor, the value set with controller room thermostat knob won't affect the controller
operation, and room temperature will depend only on value set on contact thermostat.