Инструкция на Контроллер Danfoss AK-CC 550A для холодильных витрин и камер

Текст инструкции

1. Стр. 1 Controller for appliance control

2. Стр. 3 Applications

   Here is an overview of the controller’s usage options. A setting will configure input and outputs so that the controller’s operation interface is directed at the selected application. The current settings for the respective uses can be found on page 28. Application 1-8 These uses are applied to…

3. Стр. 4 Operation

   Liquid injection Liquid injection in the evaporator is controlled by an electronic injection valve of the type AKV. The valve functions as both expansion valve and solenoid valve. The valve opens and closes using signals from the controller. The function contains an adaptive algorithm which…

4. Стр. 5 Thermostat bands

   Thermostat bands can be used beneficially for appliances where different product types are stored which require different temperature conditions. It is possible to change between the two different thermostat bands via a contact signal on a digital input. Separate thermostat and alarm limits can be…

5. Стр. 6 Defrost

   Depending on the application you may choose between the following defrost methods: Natural: Here the fans are kept operating during the defrost Electric: The heating element is activated Hotgas: Here the solenoid valves are controlled so that the hotgas can flow through the evaporator Defrost…

6. Стр. 7 Coordinated defrost

   There are two ways in which coordinated defrost can be arranged. Either with wire connections between the controllers or via data communication Wire connections The digital input DI2 is connected between the current controllers. When one controller starts a defrost all the other controllers will…

7. Стр. 8 Control of two compressors

   The two compressors must be of the same size. When the controller demands refrigeration it will first cut in the compressor with the shortest operating time. After the time delay the second compressor will be cut in. When the temperature has dropped to ”the middle of the differential”, the…

8. Стр. 9 Fan

   Pulse control To obtain energy savings it is possible to pulse control the power supply to the fans at the evaporators. Pulse control can be accomplished in one of the following ways: - during the thermostat’s cutout period (cold room) - during night operation and during the thermostat’s cutout…

9. Стр. 10 Digital inputs

   There are two digital inputs DI1 and DI2 with contact function and one digital input DI3 with high voltage signal. They can be used for the following functions: - Retransmission of contacts position via data communication - Door contact function with alarm - Starting a defrost - Main switch…

10. Стр. 11 Data communication

    The controller has fixed built-in MODBUS data communication. If there is a requirement for a different form of data communication, a Lon RS 485 module can be inserted in the controller. The connection must then be to terminal RS 485. (To use a Lon RS 485 module and gateway type AKA 245 the module…

11. Стр. 12 Applications

    Here is a survey of the controller’s field of application. A setting will define the relay outputs so that the controller’s interface will be targeted to the chosen application. On page 28 you can see the relevant settings for the respective wiring diagrams. General: The ten uses are all adapted for…

12. Стр. 13 The following uses have some special functions

    which in brief are: Application 5 ”Two-compressor” operation. The two compressors must be of the same size. On start-up (after defrosting, operational stop, etc.) both compressors are started with a set time shift. One compressor starts at half the differential so that an optimum adaptation of…

13. Стр. 14 Connection signs

    The controller is provided with signs from the factory indicating application 1. If you employ another use, signs are provided so that you can mount the relevant one. It is only the lower sign that needs to be mounted. The number is indicated on the left-hand side of the signs. Use the sign with the…

14. Стр. 15 Survey of functions

    Function Para- Parameter by operation via data meter communication Normal display Normally the temperature value from one of the two thermostat sensors S3 or S4 or a mixture of the two measurements is displayed. In o17 the ratio is determined. Thermostat Set point Regulation is based on the set…

15. Стр. 16 Melt function

    Only for control of refrigeration (-5 to +10°C). The function ensures that the evaporator will not be blocked by frost. Here you set how often the function is to stop the refrigeration and hence transform the frost to water (or ice if there is too much frost). r16 MeltInterval Melt period Here you…

16. Стр. 17 Signal to the alarm thermostat

    Here you have to define the ratio between the sensors which the alarm thermostat has to use. S3, S4 or a combination of the two. With setting 0% only S3 is used. With 100% only S4 is used Time delay on S6 (product sensor) for pull-down (long alarm delay) This time delay is used for start-up, during…

17. Стр. 18 Interval between defrost starts

    The function is zeroset and will start the timer function at each defrost start. When the time has expired the function will start a defrost. The function is used as a simple defrost start, or it may be used as a safeguard if the normal signal fails to appear. If master/slave defrost without clock…

18. Стр. 19

    If you wish to see the temperature at the defrost sensor, push the controller’s lowermost button. (May be changed to another function in o92.) If you wish to start an extra defrost, push the controller’s lowermost button for four seconds. You can stop an ongoing defrost in the same way Defrost temp.…

19. Стр. 20 Miscellaneous

    Delay of output signal after start-up After start-up or a power failure the controller’s functions can be delayed so that overloading of the electricity supply network is avoided. Here you can set the time delay. o01 Digital input signal - DI1 The controller has a digital input 1 which can be used…

20. Стр. 21 Digital input signal - D2

    The controller has a digital input 2 which can be used for one of the following functions: Off: The input is not used. 1) Status display of a contact function 2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped. When the time setting…

21. Стр. 22 Digital input signal - DI3 (high voltage input)

    The controller has a digital input 3 which can be used for one of the following functions: Off: The input is not used. 1) Status display of 230 V signal 2) Door function. When the input is 0 V it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in…

22. Стр. 23 Service

    Temperature measured with S5 sensor Status on DI1 input. on/1=closed Read the duration of the ongoing defrost or the duration of the last completed defrost. Temperature measured with S3 sensor Status at the day-/night operation (night operation: on/off ) Temperature measured with S4 sensor…

23. Стр. 24 Operating status

    (Measurement) The controller goes through some regulating situations where it is just waiting for the next point of the regulation. To make these “why is nothing happening” situations visible, you can see an operating status on the display. Push briefly (1s) the upper button. If there is a status…

24. Стр. 25 Fault message

    In an error situation the LED’s on the front will flash and the alarm relay will be activated. If you push the top button in this situation you can see the alarm report in the display. There are two kinds of error reports - it can either be an alarm occurring during the daily operation, or there may…

25. Стр. 26 Operation

    Display The values will be shown with three digits, and with a setting you can determine whether the temperature is to be shown in °C or in °F. Get a good start With the following procedure you can start regulation very quickly: 1 Open parameter r12 and stop the regulation (in a new and not…

26. Стр. 27 Auxiliary schedule for settings (quick-setup)

27. Стр. 28 Menu survey

    SW = 1.2x Parameter EL-diagram page 12 or 13 Code Min.-value Max.-value Factory setting -50°C 50°C 2 Differential r01 0.1 K 20 K 2 Max. limitation of setpoint setting r02 -49°C 50°C 50 Min. limitation of setpoint setting r03 -50°C 49°C -50 Adjustment of temperature indication r04 -10 10 0…

28. Стр. 29

    d09 d10 Pump down delay d16 min. 60 min. 0 Drain delay (used at hot gas defrost only) d17 0 min. 60 min. 0 Max. aggregate refrigeration time between two defrosts d18 0 hrs 48 hrs 0/OFF Heat in drip tray. Time from defrosting stops to heating in the drip tray is switched off d20 0 min. 240 min. 30…

29. Стр. 30

    Input signal on DI2. Function: (0=not used. 1=status on DI2. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start (pulse-signal). 5=ext. main switch 6=night operation 7=thermostat band changeover (activate r21). 8=alarm function when closed. 9=alarm function when open.…

30. Стр. 31

    Temperature measured with S5 sensor u09 Status on DI1 input. on/1=closed u10 Actual defrost time (minutes) u11 Temperature measured with S3 sensor u12 Status on night operation (on or off ) 1=on u13 Temperature measured with S4 sensor u16 Thermostat temperature u17 Run time of thermostat (cooling…

31. Стр. 32 Connections

32. Стр. 33 DO2

    Alarm There is a connection between terminal 7 and 8 in alarm situations and when the controller is without power. Rail heat and heating element in drip tray There is connection between terminal 7 and 9 when heating takes place. Night blind There is connection between terminal 7 and 9 when the night…

33. Стр. 34 Data

34. Стр. 35 Ordering

    Type Function AK-CC 550A Case controller with MODBUS data communication Sensor connections are with screw terminals Case controller with MODBUS data communication Sensor connections are with plug connections EKA 175 Data communication module LON RS 485 084B8579 EKA 178B Data communication module…

35. Стр. 36

    Manual RS8FS202 © Danfoss 10-2009 DE-BD Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be…

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