RNC Refrigerated Dryer Digital Controller

USER INTERFACE: During normal operation the display shows the evaporation temperature.

Showing machine status

    • To disable the Key Lock: Press and hold the SET for 4 sec.
    • Press and hold button DOWN for 4 sec: the display will show Pb1.
    • Press and release button UP or DOWN to select:
      • Pb1 heat exchanger probe
      • hSE running hours for unit
      • rhS reset running hours for unit
      • hFI running hours for filter
      • rhF reset running hours for filter
      • rFI reset filter alarm
    • To reset the value, press and release button SET, press and release button UP to set
      • 149 for rhF and rFI
      • 171 for rhS
      • The press and release button SET: the display will show “- - -“ flashing for 4 seconds.

      OPERATION: During normal operation, the digital controller display shows the evaporation temperature.

       Menu Buttons:

       Mode Display Buttons:

      Alarm Display:

       Alarms 

      3.1 Alarm Output

      • if a low temperature alarm is running (the display shows the code “tAL”)
      • if a high temperature alarm is running (the display shows the code “tAH”)
      • if it is required to change the filter (the display shows the code “FIL”)
      • if an alarm HP or HPr is running
      • if an alarm COH or CSd is running
      • if the compressor running hours allowed has been overtaken ( the display shows the code “SEr” and the LED service is lit.)
      • if the compressor running hours allowed has been overtaken ( the display shows the code “FIL” and the LED service is lit.)


      3.2 Device / Compressor Running Hours for SEr

      Parameter sets to record the device running hours or the compressor running hours. When the running hours overtakes the hours, the display shows the code “SEr” alternated to the temperature read by the heat exchanger, LED service is lit and the device works normally. To show/cancel the compressor running hours have a look at chapter 1 “USER INTERFACE” (labels hSE and rHS).

      3.3. Device / compressor runtime for FIL

      Parameter sets to record the device runtime or the compressor runtime. When the runtime reaches set limit, the display shows the code “FIL” replacing the temperature read by the heat exchanger, service LED is lit and the device works normally. To show/cancel the compressor runtime have a look at chapter 1 “USER INTERFACE” (labels hSE and rHS).

      3.4. Input change filter

      The activation of this input triggers the display showing the code “FIL” alternated to the temperature read by the heat exchanger, LED service is lit and the device works normally. Restoring the normal operation works the same way as cancelling the filter runtime (look for label rFI)

      3.5. High Pressure alarm

      During this alarm the compressor is switched off.

      3.6. Condenser Fan

      • If one output is configured as condenser fan, parameters are relevant, as follows.
      • If just one of the input terminal pairs, 11-10 or 9-10, is configured as fan activation, the input activation also activates the output.
      • If the input terminal pair 11-10 is configured as condenser probe, the fan will be switched on when the compressor is switched on; as soon as the compressor switches off, the fan keeps in being switched on for the time F1, then it works according to temperature F0 (the fan switches off when the temperature falls below the temperature F0 and switches on when the temperature rises above F0 + 2°C/4°F.
      • If the condenser probe is in error, the fan is switched on if the compressor is switched on and is switched off if the compressor is switched off (in this last case the fan is switched off with the delay F1 since the compressor switches off).
      • If the input terminal pair 11-10 is configured as condenser fan and the input terminal pair 9-10 is configured as fan activation, input terminal pair 11-10 has priority over the input terminal pair 9-10.
      • If no input is configured to manage the fan, this is switched on if the compressor is switched on, and switched off if the compressor is switched off (in this last case the fan is switched off with the delay F1 since the compressor switches off).
      • In case of COH and CSd alarm the fan is switched on; the fan LED shows the status of the output.

        3.7. Drain Test

        Press and hold button UP 4 s: the relay will be turned on as long the button is pressed. When the button is released the valve restores its cyclical operation.

         

        FILTER ALARM: Follow the steps below to reset the filter alarm:

        To reset the filter alarm, you need to enter the service domain and then access the “rHF” section. Please follow the steps carefully.

        Filter Alarm Reset

        RESET SERVICE ALARM
         

         

         

        Steps to change the TEMPERATURE UNITS from F / C:

        To reset the filter alarm, you need to enter the service domain and then access the “rHF” section. Please follow the steps carefully.

        Table 1 Steps to reset the filter alarm

         

        Follow the steps below to change the Filter Alarm Parameters:

        For the filter alarm duration, you need to enter the parameter field and then access the “A9” section. Please follow the steps carefully.
        When making these adjustments, be careful of the timing on the controller. The standard timing is 6000 hours. For this, the value that should be entered in A9 is 60. The controller evaluates the entered values by multiplying by 100. For example; 60 x 100 = 6000 h.


         

        Follow the steps below to change the ENERGY SAVING MODE parameters:
        For the energy saving mode parameters, you need to enter the parameter field and then access the “r1” and “r2” section. Please follow the steps carefully.
        “r1” is the initial value of the energy saving mode parameter. After the evaporation value reaches this value “r1”, the dryer goes to stand by. “r1” is the end value of the energy saving mode parameter. When the evaporation value reaches this value, the dryer comes out of the standby and starts to work.

         

         

        Follow the steps below to change the Drain Time Parameters:

        For the drain times it is necessary to enter the parameter field and then access the sections “u2” and “u3”. Please follow the steps carefully. Note that when these values are changed, the time of evacuation closed time is in minutes and the time of evacuation opened time is in seconds.

         

         

         

        CONTROLLER ELECTRICAL CONNECTION
        EV3B23* and EV3B33* have the same electrical connection; EV3B23 relay K1 is rated 16 A, EV3B33 relay K1 is 30 A.