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AKO -21006 User Manual
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AKO -21006 User Manual

AKO -21006 User Manual

The new generation of controllers for compressor racks
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2100H602 Ed.01
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we make it easy
AKODUO User Manual
The new generation of controllers for compressor
racks

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Summary of Contents for AKO AKO-21006

  • Page 1 2100H602 Ed.01 we make it easy AKODUO User Manual The new generation of controllers for compressor racks...
  • Page 2 Complying with and enforcing the regulations applying to installations where our products are destined to be used is the responsibility of the installer and the customer. AKO Electromecànica accepts no liability for damage which may occur due to failure to comply with these regulations.
  • Page 3 DUOControl carries out the management of the installed components, the detection of alarms and the recording of events (historical log of alarms and hours of operation of the compressors). As display units, enables the use of the DUOVision terminal and AKO-5004 Server Software. DUOControl...
  • Page 4 Modularity: Model selection according to current and future needs. Reliability: Use of automation technology as Control Hardware. Unlimited number of operations: Control with transistor outputs (TRT). Connectivity: Enables MODBUS connection for remote control / monitoring (AKO-5004). DUOControl Designed for refrigerating plant with compressors of equal characteristics Flexible wiring: Multiple compressor –...
  • Page 5 3 Fixed digital Inputs: General high pressure switch, General low pressure switch and Manual/Automatic selector. Alarm RY Output (provided an output is available depending on configuration) DIN rail mounting 2 User terminals: DUOVision or AKO-5004 DUOVision Programming assistant: Basic installation configuration. Input/Output test: Wizard for checking input/output wiring.
  • Page 6 AKO-21006 Controller with 6 outputs made up of: 1 AKO-21801 Module: Control unit with 8 digital inputs and 6 digital outputs 1 AKO-21802 Module: Extension unit with 3 inputs and 1 output at 4-20 mA AKO-21012 Controller with 12 outputs made up of:...
  • Page 7 When you purchase an AKO-21006/12/18 you receive all the modules which make them up, although each of the modules can also be purchased separately. The following table summarises the composition of the three DUOControl models. AKO-21006...
  • Page 8 AKO-21018 The modular design of DUOControl enables a controller to be expanded by adding a new AKO-21803 module to its right, up to a maximum of 2. Likewise, it is also possible to remove one of the AKO-21803 modules. Example: By adding 1 x AKO-21803 module, the AKO-21006 controller becomes an AKO-21012.
  • Page 9 Control of Inputs / Outputs. Algorithm for compressor and fan control. Alarm management. Recording of events (Alarm log). MODBUS communication in slave mode. Communication with the user terminal (DUOVision and AKO-5004). HARDWARE DUOVision communication interface. MODBUS communication interface. Interface for connecting to other modules.
  • Page 10 we make it easy 1.- Position of the DIN rail. D2.- Status LEDs for the digital Inputs and Outputs. 2.- Module earth connector. INPUT with LED ON: +24 V in the 3.- DIN rail clamp. corresponding terminal. 4.- Upper terminal block. INPUT with LED OFF: 0 V in the 5.- Interface for communication with other modules.
  • Page 11 AKO-21802 Module for managing 4-20 mA inputs and outputs. 1.- Position of the DIN rail. 2.- Module earth connector. 3.- DIN rail clamp. 4.- Upper terminal block (3 x 4-20 mA Inputs). 5/6.- Interface for communication with other modules.
  • Page 12 we make it easy 1.- 4-digit display with one decimal. 2.- Digit to indicate the input or output to which the value corresponds. The value of this will increase on pressing the button (8). 0 — 4-20 mA input current from the evaporation pressure probe. 1 —...
  • Page 13 AKO-21803 Extension module for digital inputs and outputs. 2 Digital Inputs 6 Digital Outputs 1.- Position of the DIN rail. 2.- DIN rail clamp. 3.- Upper terminal block (2 Digital Inputs and 2 Digital Outputs). 4/5.- Interface for communication with other modules.
  • Page 14 2.3.- WIRING TERMINALS The following figure shows the layout of the terminals and their labelling. Terminal Controller AKO-21018 Function Label AKO-21801 AKO-21802 AKO-21803 AKO-21803 Controller Terminal AKO-21012 Label Function AKO-21801 AKO-21802 AKO-21803...
  • Page 15 Function AKO-21801 AKO-21802 The terminals for the AKO-21801 and AKO-21802 modules always have the same notation. In the case of AKO-21803 modules, the notation of the terminals depends on the position occupied. Terminals can be classified as follows, according to their function:...
  • Page 16 we make it easy 2.3.1.- FIXED WIRING TERMINALS The recommended wiring for the fixed wiring terminals is shown below: The general high and low pressure switchs are connected to terminals I1 and I2 respectively. The type of contact for each of these inputs can be configured by means of the user parameters ENTR_1 and ENTR_2.
  • Page 17 we make it easy 2.3.2.- VARIABLE WIRING TERMINALS (I4-I12 and O1-O18) The wizard (Section 3.1.) allocates the function to each of the variable wiring terminals. This allocation depends on the following parameters of the refrigeration installation: No. of Compressors (user parameter CONF_1) No.
  • Page 18 No. of Compressors = 2 No. of Stages per compressor = 2 With an AKO-21012 controller, it is possible to control up to 5 fans. With an AKO-21018 controller, the number of fans can be increased Detail of the table of inputs for the AKO-21012...
  • Page 19 No. of Compressors = 2 No. of Stages per compressor = 2 No. of Fans = 3 (ON/OFF control) DUOControl Model: AKO-21012 Terminals I9 and I10 are left unconnected. Detail of the table of inputs for the AKO-21012 FANS CONTROLLED ON/OFF T-C1 T-V1 T-V2...
  • Page 20 we make it easy The digital inputs and outputs from the above example are connected as follows:...
  • Page 21 we make it easy KC1a KC2a KC1_C KC2_C KV1_C KV2_C KV3_C PARTIALISATION PARTIALISATION In this wiring example, the terminals with fixed function and the 4-20mA inputs/outputs are absent (Section 2.3.1.). KC1_C KC2_C KV1_C KV2_C KV3_C Compressor C1 Compressor C2 Fan V1 Fan V2 Fan V3...
  • Page 22 RY_A Alarm Outputs (*) (*) The following configurations have no terminal for alarm output: AKO-21006 with 1 compressor of 2 stages and 4 fans with 1 compressor of 3 stages and 3 fans with 1 compressor of 4 stages and 2 fans...
  • Page 23 AKO-21006 Inputs FANS CONTROLLED BY INVERTER FANS CONTROLLED ON/OFF T-C1 T-V1 T-V2 T-V3 T-V4 T-C1 T-VAR T-C1 T-V1 T-V2 T-V3 T-V4 T-C1 T-VAR T-C1 T-V1 T-V2 T-V3 T-C1 T-VAR T-C1 T-V1 T-V2 T-C1 T-VAR T-C1 T-C2...
  • Page 24 AKO-21012 Inputs FANS CONTROLLED ON/OFF T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-C1 T-C2 T-V1...
  • Page 25 AKO-21012 Inputs FANS CONTROLLED BY INVERTER T-C1 T-VAR T-C1 T-VAR T-C1 T-VAR T-C1 T-VAR T-VAR T-C1 T-C2 T-C1 T-C2 T-VAR T-VAR T-C1 T-C2 T-C1 T-C2 T-VAR T-VAR T-C1 T-C2 T-C3 T-VAR T-C1 T-C2 T-C3 T-VAR T-C1...
  • Page 26 AKO-21018 Inputs FANS CONTROLLED ON/OFF T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-V7 T-V8 T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-V7 T-V8 T-C1 T-V1 T-V2 T-V3 T-V4 T-V5 T-V6 T-V7 T-V8 T-C1 T-V1 T-V2 T-V3...
  • Page 27 AKO-21018 Inputs FANS CONTROLLED BY INVERTER T-C1 T-VAR T-C1 T-VAR T-C1 T-VAR T-C1 T-VAR T-VAR T-C1 T-C2 T-VAR T-C1 T-C2 T-VAR T-C1 T-C2 T-VAR T-C1 T-C2 T-C3 T-VAR T-C1 T-C2 T-C3 T-VAR T-C1 T-C2 T-C3 T-VAR...
  • Page 28 we make it easy 2.3.3.- 4-20 mA INPUT AND OUTPUT TERMINALS The controllers have: · 3 x 4-20 mA inputs for suction, discharge and Ambient air temperature probes · 1 x 4-20 mA output to control a Inverter The wiring for all these 4-20 mA inputs/outputs is as follows: SUCTION PROBE DISCHARGE PROBE PT100 / 4-20mA...
  • Page 29 If there is an output available, the assistant assigns a digital output as the alarm output. The terminal allocated as the alarm output depends on the controller used: For the AKO-21006 controller, the alarm output is connected to O6. For the AKO-21012 controller, the alarm output is connected to O12.
  • Page 30 we make it easy Wiring of the inputs and outputs for the previous example: KC1a KC2a ALARM KC1_C KC2_C KV1_C KV2_C KV3_C Indicator Alarm PARTIALISATION PARTIALISATION...
  • Page 31 3.- User terminal: DUOVision (AKO-21701). The DUOVision terminal allows the user to: Start up an installation: Wizard and entry of values into the user parameters Monitor the installation: Dynamic graphic display Adjust the operation of the installation: HELP to facilitate the adjustment of user parameters Display logs: Log of alarms and accumulated operation of the compressors DUOVision is made up of the DISPLAY and the NAVIGATOR.
  • Page 32 we make it easy The power supply and communication connector for DUOVision is at the rear. CONNECTOR Wiring of DUOVision: The use of the same power supply lines for the DUOControl controller and the DUOVision user terminal is recommended. The technical specifications of the DUOVision user terminal and the steps to follow to mount it in the panel are detailed in Appendix A.
  • Page 33 we make it easy 3.1.- WIZARD The WIZARD guides the user through the process of configuring and starting up the refrigerating facility. It enables you to: Check the wiring for the control panel. Inform the DUOControl of the installation characteristics. Adjust essential parameters for the initial start up of the installation.
  • Page 34 Select YES when you wish all the user parameters to be returned to their default values. For example: Select NO when a controller is expanded by adding a new AKO-21803 module and you wish to change a configuration parameter while retaining the other parameters.
  • Page 35 we make it easy SCREEN W-3: HOW MANY COMPRESSORS IN THE INSTALLATION? VALUE WIZARD No. compressors NAVIGATOR function: UP and DOWN: Enter the number of compressors in the facility SET: Confirm the entered value and go on to the next screen ESC: Return to SCREEN W-0 OTHERS: No function SCREEN W-4: HOW MANY STAGES PER COMPRESSOR?
  • Page 36 we make it easy SCREEN W-5: WHAT TYPE OF PARTIAL LOADING ACTIVATION? VALUE WIZARD Active when powered Active when not powered Compr. capacity reduction Select “ Active when powered ” or “ Active when not powered ” considering the type of compressors used. For further information, see Section 3.3.1.
  • Page 37 we make it easy SCREEN W-7: ALARM OUTPUT WIZARD OUTPUT ASSIGNED 18 Alarm output activated Notification of whether it has been possible to allocate a terminal as an alarm output will appear on the screen. To understand in which cases it is not possible to have such an output available, see Section 2.3.2. NAVIGATOR function: SET: Confirm the preselected response ESC: Return to SCREEN W-0...
  • Page 38 we make it easy SCREEN W-I/O In the case that YES is selected, the display screen will be similar to that below: HIGH MAAU The status of the inputs is shown in the area on the left of the Display. Safety circuits for the fans (or inverter) General high pressure switch HIGH...
  • Page 39 Press ESC to exit from I/O TESTING and return to SCREEN W-1. Chapter 2 explains how to identify the control function of each of the terminals. Example: Consider the following refrigerating facility: Controller Model: AKO-21018 No. of Compressors: 3 No. of Stages per Compressor: 2 No.
  • Page 40 we make it easy Terminal Function General High Pressure switch Input General Low Pressure switch Input MANUAL/AUTOMATIC Selector Input Safety circuit Input for Compressor 1 Safety circuit Input for Compressor 2 Safety circuit Input for Compressor 3 Safety circuit Input for Fan 1 Safety circuit Input for Fan 2 Safety circuit Input for Fan 3 Safety circuit Input for Fan 4...
  • Page 41 we make it easy SCREEN W-9: WHICH TYPE OF REFRIGERANT GAS? VALUE WIZARD GENERIC R404A Refrigerant type R134A CHANGING VALUE INVOLVES R717 DEFAULT VALUES R410A R507 Select the refrigerant gas used in the installation. If it is not in the list, choose GENERIC. In this case the DUOControl will only be able to work in bar as the working unit.
  • Page 42 we make it easy SCREEN W-11: SUCTION PROBE – PRESSURE VALUE (bar) FOR A CURRENT OF 4 mA VALUE WIZARD Suction Probe - 4mA -1.0 Enter the pressure equivalent to an output current of 4 mA from the suction probe. NAVIGATOR function: UP and DOWN: Change the value of the selected digit LEFT and RIGHT: Move the digit selection...
  • Page 43 we make it easy SCREEN W-13: DISCHARGE PROBE – PRESSURE VALUE (bar) FOR A CURRENT OF 4 mA VALUE WIZARD Discharge Probe - 4mA -1.0 Enter the pressure equivalent to an output current of 4 mA from the discharge probe. NAVIGATOR function: UP and DOWN: Change the value of the selected digit LEFT and RIGHT: Move the digit selection...
  • Page 44 we make it easy SCREEN W-15: EVAPORATION SET POINT VALUE VALUE WIZARD Evap. Setpoint (SP) Evaporation pressure set point. NAVIGATOR function: UP and DOWN: Change the value of the selected digit LEFT and RIGHT: Move the digit selection SET: Confirm the preselected response ESC: Return to SCREEN W-8 OTHERS: No function SCREEN W-16: CONDENSATION SET POINT VALUE...
  • Page 45 we make it easy SCREEN W-17: CONFIRMING THE CONFIGURATION VALUE WIZARD SAVE DATA Select YES to confirm ALL the data entered and transfer them to the DUOControl. Select NO to delete the data and return to the initial wizard screen. If the data is confirmed, the wizard will close and proceed to MONITORING THE INSTALLATION.
  • Page 46 we make it easy 3.2.- MONITORING THE INSTALLATION The MONITORING SCREEN shows all the information required for determining the status of the refrigerating facility: The MONITORING SCREEN appears: When the wizard closes. On starting up a previously configured DUOControl controller. On returning from the USER PARAMETER AND LOGS MENU.
  • Page 47 we make it easy Fan numbering Fans operating Number of compressor partial loadings Compressors operating Compressor numbering The area set aside for the compressors varies according to the type of compressor used. Single stage 2-stage 3-stage 4-stage compressor compressor compressor compressor Inverter output: 0%: 4 mA - 100%: 20 mA...
  • Page 48 we make it easy The Energy Saving and Floating Condensation icons only appear when these are active. The Communication Error icon appears when there is an error in the communication between the DUOControl and the DUOVision. The manual mode icon appears when there is 24 V present at input I3.
  • Page 49 we make it easy 3.3.- USER PARAMETERS AND LOGS When the SET key is pressed for 3 seconds on the MONITORING SCREEN, the USER PARAMETER AND LOGS MENU is displayed. It is possible to activate PASSWORD protection in the TERM_1 parameter. CONFIGURATION AND LOG SCREEN: No.
  • Page 50 we make it easy 3.3.1.- CONFIGURING THE INSTALLATION User parameters related to the structure of No. Compressors the refrigerating installation. As a change in No. Compressor stages these parameters would involve a change in Compr. capacity reduction Alarm output activated the behaviour of the installation, it is only possible to Type of fan control modify the parameters in this folder by means of the...
  • Page 51 we make it easy Parameter: Compressor capacity reduction contact Code: CONF_3 Description: Type of activation for compressor partial loadings. This can be selected between: Active when powered: The DUOControl activates partial loading with +24 VDC to increase refrigerating power. Active when not powered : The DUOControl activates partial loading with +0 VDC to increase refrigerating power.
  • Page 52 we make it easy For a compressor with 3 partial loadings: Active when powered Compressor Partial loading-a Partial loading-b Partial loading-c Stages ON 0 VDC 0 VDC 0 VDC 0 VDC 0 of 4 24 VDC 0 VDC 0 VDC 0 VDC 1 of 4 24 VDC...
  • Page 53 we make it easy Parameter: Refrigerant Type Code: CONF_7 Description: Type of refrigerant used in the installation. R404A R134A R717 R410A R507 R744 GENERIC Select GENERIC when any other refrigerant is used. In this case the controller can only work in bar as the working unit.
  • Page 54 we make it easy 3.3.2.- EVAPORATION Evap. Setpoint (SP) User parameters relating to the Upper limit Evap. SP adjustment of the evaporation circuit. Lower limit Evap. SP Compressors rotation Compressor Control Positive Diff. Slow Zone Negative Diff. Slow Zone Positive Diff. Fast Zone Negative Diff.
  • Page 55 we make it easy EVAP_2 Parameter: Lower limit Evap. SP Code: EVAP_3 Upper variation margin Units: According to CONF_8 parameter EVAP_1 Description: Minimum value permitted for Lower variation margin parameter EVAP_1. EVAP_3 Parameter: Compressor Rotation Code: EVAP_4 Description: Type of compressor rotation. DUOControl controllers have 2 algorithms implemented for selecting the compressors to start and/or stop.
  • Page 56 we make it easy Parameter: Positive Differential Fast Zone Code: EVAP_8 According to CONF_8 parameter Units: Description: Bandwidth of the POSITIVE FAST ZONE used in the definition of the algorithms for controlling the compressors. For further information, see Chapter 4. Parameter: Negative Differential Fast Zone Code:...
  • Page 57 we make it easy 3.3.3.- CONDENSATION User parameters relating to the adjustment Condensation SP of the condensation circuit. Upper limit Cond. SP Lower limit Cond. SP Fan Control Positive Diff. Slow Zone Negative Diff. Slow Zone Positive Diff. Fast Zone Negative Diff.
  • Page 58 we make it easy COND_2 Parameter: Lower limit Condensation SetPoint Code: COND_3 Upper variation margin According to CONF_8 parameter Units: COND_1 Description: Minimum value permitted for Lower variation margin parameter COND_1 COND_3 Parameter: Fan Control Code: COND_4 Description: Type of algorithm for condenser fan control. NEUTRAL ZONE PROPORTIONAL BAND For further information, see Chapter 5.
  • Page 59 we make it easy Parameter: Negative Differential Fast Zone Code: COND_8 Units: According to CONF_8 parameter Description: Bandwidth of the NEGATIVE FAST ZONE used in the definition of the algorithms for controlling the condensation circuit. For further information, see Chapter 5. Parameter: Activate Floating Cond.
  • Page 60 we make it easy 3.3.4.- FLOATING CONDENSATION Min. Condensation Temp. Parameters relating to the adjustment of the Condenser Temp. Differ. algorithm used for floating condensation. With the cursor in the left-hand area of the Display, the function of the NAVIGATOR is as follows: UP and DOWN: Select the desired parameter SET: Confirm the selected user parameter to modify its value (right-hand area of the Display) HELP (?): Display the help window for the parameter selected in the right-hand area of the Display...
  • Page 61 we make it easy 3.3.5.- CONFIGURING THE PROBES User parameters relating to the calibration Suction Probe - 4mA and scaling of the probes used: Suction Probe, Suction Probe - 20mA Suction Probe - Offset Discharge Probe and Ambient air Temperature Discharge Probe - 4mA Probe.
  • Page 62 we make it easy Parameter: Suction Probe - Offset Code: SOND_3 Units: Description: Suction probe offset. Parameter: Discharge Probe - 4 mA Code: SOND_4 Units: Description: Pressure equivalent to an output current of 4 mA from the discharge probe. Parameter: Discharge Probe - 20mA Code: SOND_5...
  • Page 63 we make it easy 3.3.6.- CONFIGURING THE DIGITAL INPUTS User parameters relating to digital inputs: High Pressure Switch General High Pressure switch , General Low Low Pressure Switch Compressor safety circuit Pressure switch and Safety circuits for the Fan safety circuit inverter, Compressors and Fans.
  • Page 64 we make it easy Parameter: High Pressure Switch Código: ENTR_1 Descripción: Type of contact for the general high pressure switch Open contact error: The relay for the general high pressure switch is closed in normal operation Normal operation: +24 V in terminal I1. General high pressure switch active: 0 V in terminal I1.
  • Page 65 we make it easy Parameter: Low Pressure Switch Code: ENTR_2 Description: Type of contact for the general low pressure switch Open contact error: The relay for the general low pressure switch is closed in normal operation Normal operation: +24 V in terminal I2. General low pressure switch active: 0 V in terminal I2.
  • Page 66 we make it easy Parameter: Compressor Safety Circuit Code: ENTR_3 Description: Type of safety circuit for the compressors. Open contact error: The safety circuit for the compressors is closed in normal operation Normal operation: +24 V in the input terminals for the compressor safety circuits Safety circuit activated: 0 V in the input terminals for the compressor safety circuits T-C1...
  • Page 67 we make it easy Parameter: Fan Safety Circuit Code: ENTR_4 Description: Type of safety circuit for the fans. Open contact error: The safety circuit for the fans is closed in normal operation Normal operation: +24 V in the input terminals for the fan safety circuits Safety circuit activated: 0 V in the input terminals for the fan safety circuits T-V1 Closed contact error: The safety circuit for the fans is open in normal operation...
  • Page 68 we make it easy 3.3.7.- ENERGY SAVING User parameters for configuring the Energy Day(s) of the week Start - Hour Saving function. Start - Minute Energy Saving Duration For further information on this functionality, see Evap. Diff. Energy Saving Section 7.3. With the cursor in the left-hand area of the Display, the function of the NAVIGATOR is as follows: UP and DOWN: Select the desired parameter SET: Confirm the selected user parameter to modify its value (right-hand area of the Display)
  • Page 69 we make it easy Parameter: Start - Hour Code: AENR_2 Units: Hours Description: Hour for starting the Energy Saving function. Parameter: Start - Minutes Code: AENR_3 Units: Minutes Description: Minutes for starting the Energy Saving function. Parameter: Energy Saving Duration Code: AENR_4 Units:...
  • Page 70 we make it easy 3.3.8.- TIMING User parameters relating to the Fan MIN. time ON configuration of timing protection for the Fan MIN. time OFF Fan ON-ON Delay Slow compressors and fans. Fan OFF-OFF Delay Slow. Fan ON-ON Delay Fast Fan OFF-OFF Delay Fast Compressor T.
  • Page 71 we make it easy Parameter: Fan MIN. time OFF Code: TEMP_2 Units: Seconds Description: Minimum stop time for the condenser fans. This parameter is useful for preventing an excessive number of fan starts and stops. Parameter: Fan ON-ON Delay Slow Code: TEMP_3 Units:...
  • Page 72 we make it easy Parameter: Fan OFF-OFF Delay Fast Code: TEMP_6 Units: Seconds Description: Minimum time between shutdowns of different fans within the fast control zone. Adjustment of this parameter is very important in defining dynamic control of the fans: Neutral Zone or Proportional Band For further information, see Chapter 5.
  • Page 73 we make it easy Parameter: Compr. OFF-OFF Delay Slow Code: TEMP_10 Units: Seconds Description: Minimum time between shutdowns of different compressor stages in the slow control zone. Adjustment of this parameter is very important in defining dynamic control of the compressors: Neutral Zone or Proportional Band For further information, see Chapter 4.
  • Page 74 we make it easy 3.3.9.- PROTECTIONS AND ALARMS User parameters defining the behaviour of Stgs.ON Aspir. Probe Fail the installation in case of error or alarm. Fans ON Disch.Probe Fail HP circuit Pre-Alarm HP circuit Pre-Alarm Diff LP circuit Pre-Alarm LP circuit Pre-Alarm Diff MAX T.
  • Page 75 we make it easy Parameter: HP circuit Pre-Alarm Code: PROT_3 Units: Description: Maximum value for high pressure in normal operation. The objective of this alarm is to prevent activation of the general high pressure switch, which would lead to the immediate shutdown of the installation. For further information, see Chapter 6.
  • Page 76 we make it easy Parameter: LP circuit Pre-Alarm Diff Code: PROT_6 Units: Description: Low pressure pre-alarm differential. For further information, see Chapter 6. Parameter: MAX T. Comp. Mainten. Code: PROT_7 Units: Hours Description: Maximum number of accumulated operating hours for a compressor between two consecutive maintenance operations.
  • Page 77 we make it easy 3.3.10.- DATE AND TIME User parameters for entering the date Minute Hour and time. Day of the week Month Year With the cursor in the left-hand area of the Display, the function of the NAVIGATOR is as follows: UP and DOWN: Select the desired parameter SET: Confirm the selected user parameter to modify its value (right-hand area of the Display) HELP (?): Display the help window for the parameter selected in the right-hand area of the Display...
  • Page 78 we make it easy 3.3.11.- CONFIGURING DUOVision Configuration of the DUOVision user Password MODBUS address terminal. Adj. Contrast and Colour Language With the cursor in the left-hand area of the Display, the function of the NAVIGATOR is as follows: UP and DOWN: Select the desired parameter SET: Confirm the selected user parameter to modify its value (right-hand area of the Display) HELP (?): Display the help window for the parameter selected in the right-hand area of the Display ESC: Return to the CONFIGURATION AND LOGS SCREEN...
  • Page 79 we make it easy Parameter: MODBUS address Code: TERM_2 Description: Setting the address of the DUOControl controller within a local MODBUS network. Parameter: Adjusting Contrast and Colour Code: TERM_3 Description: Configuration of the contrast and background colour for the two Display zones when showing the MONITORING SCREEN.
  • Page 80 we make it easy 3.3.12.- MODEL AND SOFTWARE VERSIONS Displaying the DUOControl model and DUO Control Model DUO Control SW Version the Software versions. DUO Vision SW Version Within this folder the function of the NAVIGATOR is as follows: UP and DOWN: Select the desired parameter HELP (?): Display the help window for the parameter selected in the right-hand area of the Display.
  • Page 81 we make it easy 3.3.13.- ALARM LOG The DUOControl controllers record the ALARM LOG activation and deactivation of the alarms. DISPLAY ERASE LOG The alarm log holds a record of the last 50 alarm events. For further information regarding the detection of alarms, see Chapter 6.
  • Page 82 we make it easy ALARM DATE TIME DATE OF EVENT ALARM TIME OF EVENT DESCRIPTION Parameter: DISPLAY Code: ALRM_1 Description: Displaying the list of alarms in date and time order. The UP and DOWN keys are used to scan through the list. Parameter: ERASE LOG Code:...
  • Page 83 we make it easy 3.3.14.- ACCUMULATED OPERATION OF THE COMPRESSORS Timer display for the OPERATING TIME RESET TOTAL TIMERS compressors. RESET MAINT. TIMERS DUOControl controllers have timers for each compressor: Accumulated operating time for the compressors: Shows the time the compressor has run since its commissioning.
  • Page 84 we make it easy 4.- Compressor regulation The user parameter EVAP_5 permits the selection of the type of compressor control: 4.1.- NEUTRAL ZONE (EVAP_5=0): Five operating zones are defined. Pevap (bar) POSITIVE FAST ZONE Tevap (ºC) EVAP_8 POSITIVE SLOW ZONE EVAP_6 EVAP_1 (EVAP SP) NEUTRAL ZONE...
  • Page 85 we make it easy 4.2.- PROPORTIONAL BAND (EVAP_5=1): Five operating zones are defined. Pevap (bar) POSITIVE FAST ZONE Tevap (ºC) POSITIVE SLOW ZONE EVAP_8 EVAP_6 EVAP_1 (EVAP SP) EVAP_7 NEGATIVE SLOW ZONE EVAP_9 NEGATIVE FAST ZONE The parameters which delimit each of the 5 zones (EVAP_6, EVAP_7, EVAP_8 and EVAP_9) are defined in bar or ºC according to the parameter CONF_8 (in the case of using a GENERIC refrigerant, only in bar).
  • Page 86 we make it easy Example: Compressor facility with 3 x 2-stage compressors. EVAPORATION SP (EVAP_1): -10ºC POSITIVE SLOW ZONE DIFFERENTIAL WITH RESPECT TO EVAP_SP (EVAP_6): 2ºC NEGATIVE SLOW ZONE DIFFERENTIAL WITH RESPECT TO EVAP_SP (EVAP_7): 4ºC The start/stop points for the compressors or stages will be located at the following evaporation pressure levels: Pevap (bar) Tevap (ºC)
  • Page 87 we make it easy Stage Start Stop The activation/deactivation points 1ª -13ºC -14ºC for the compressors or stages are: 2ª -12ºC -13ºC 3ª -11ºC -12ºC 4ª -10ºC -11ºC 5ª -9ºC -10ºC 6ª -8ºC -9ºC The control action depends on the suction probe reading in the following way: Within the PROPORTIONAL BAND: the minimum time interval between startups of compressors or stages is defined by the parameter TEMP_9, while the minimum time interval between shutdowns of compressors or stages will be defined by the parameter TEMP_10.
  • Page 88 we make it easy 4.3.- MANAGEMENT OF COMPRESSOR STARTUP/SHUTDOWN The parameter EVAP_4 defines the management of compressor startups/shutdowns: OPERATING HOURS: Method based on the compressor s accumulated operating times. Selection of the compressor to start up: The compressor with the least accumulated operating time starts.
  • Page 89 we make it easy 5.- Fan regulation Fans can be controlled ON/OFF or via a 4-20 mA signal by means of a inverter. 5.1.- MANAGEMENT OF ON/OFF FANS (CONF_5=0). The parameter COND_4 defines the type of regulation for fans controlled ON/OFF. NEUTRAL ZONE (COND_4=0): Five operating zones are defined.
  • Page 90 we make it easy 5.1.2.- PROPORTIONAL BAND (COND_4=1): Five operating zones are defined. Pcond (bar) POSITIVE FAST ZONE Tcond (ºC) COND_7 POSITIVE SLOW ZONE COND_5 COND_1 (COND SP) COND_6 NEGATIVE SLOW ZONE COND_8 NEGATIVE FAST ZONE The parameters which delimit each of the 5 zones (COND_5, COND_6, COND_7 and COND_8) are defined in bar or ºC according to the parameter CONF_8 (only in bar in the case that CONF_7 = GENERIC).
  • Page 91 we make it easy Example: Condenser with 6 fans. CONDENSATION SP (COND_1): + 45ºC POSITIVE SLOW ZONE DIFFERENTIAL WITH RESPECT TO COND_SP (COND_5): 4ºC NEGATIVE SLOW ZONE DIFFERENTIAL WITH RESPECT TO COND_SP (COND_6): 8ºC The start/stop points for the stages are located at the following evaporation pressure levels: Pvap (bar) Tcond (ºC)
  • Page 92 we make it easy Within the POSITIVE SLOW ZONE: the time between startups of different fans is defined by the parameter TEMP_4. Within the POSITIVE FAST ZONE: the time between startups of different fans will be defined by the parameter TEMP_6. Within the NEGATIVE SLOW ZONE: the time between shutdowns of different fans is defined by the parameter TEMP_3.
  • Page 93 we make it easy 6.- Alarm management DUOControl controllers enable the following alarms to be detected: Safety circuit for the compressors Safety circuit for the fans (or inverter) General high pressure switch General low pressure switch High pressure pre-alarm Low pressure pre-alarm Suction probe error Discharge probe error Ambient air probe error...
  • Page 94 we make it easy GENERAL LOW PRESSURE SWITCH All the compressors stop automatically when the general low pressure switch is activated. They start to work normally again when the pressure switch is reset (manually or automatically). HIGH PRESSURE PRE-ALARM The parameter PROT_3 defines the maximum condensation pressure/temperature value in normal operation.
  • Page 95 we make it easy LOW PRESSURE PRE-ALARM The parameter PROT_5 defines the minimum evaporation pressure/temperature value in normal operation. When the evaporation pressure/temperature exceeds the value specified by PROT_5, compressor stages are shutdown in turn with a time interval defined by the parameter TEMP_12. The deactivation of the compressor stages ends when evaporation pressure/temperature falls below the differential PROT_6.
  • Page 96 we make it easy 7.- Other functionalities 7.1.- Pump-Down (EVAP_10). This function controls the shutdown of the last operating compressor stage. Pump-Down starts when there is only one compressor operating. The shutdown of this stage takes place when: This single stage operates for a period of time in excess of that defined by the user parameter EVAP_11.
  • Page 97 we make it easy 7.2.- Floating Condensation (COND_9) Unlike constant condensation, Floating Condensation adjusts the condensation Set Point according to the Ambient air temperature and other installation parameters. The aim of this is to reduce the installation's electricity consumption. To achieve efficient regulation of the discharge pressure, the user needs to enter the T for the condenser used (CODF_2) and the minimum condensation temperature (CODF_1).
  • Page 98 Appendix A:- Technical Specifications A.1.- AKO-21801 Technical Specifications Ambient temperature for operation 0ºC to 50ºC Ambient temperature for storage -30ºC to 70ºC Power Supply - Power supply voltage Rated value 24 VDC Permissible range 19.2 V to 30 V...
  • Page 99 we make it easy Built in digital inputs - Number of inputs - Electronic insulation of the inputs 1,500 VAC - Input types PNP and NPN - Input voltage Rated value 24 VDC Signal at 0 (IEC 1131-2) 0 to +5 V Signal at 1 (IEC 1131-2) +15 to +30 - Input current at 24 VDC...
  • Page 100 A.2.- AKO-21802 Technical Specifications Power is supplied from the central unit to the analogue extensions at 5 V and 24 VDC. The analogue value is shown in a customised format for each channel in a 4-digit display. The channel number is selected using the button on the front.
  • Page 101 A.3.- AKO-21803 Technical Specifications Power is supplied to the binary extension units at 5 V from the central unit. Notice: The extensions must be connected and disconnected without power supply. Ambient temperature for operation 0ºC to 50ºC Ambient temperature for storage -30ºC to 70ºC...
  • Page 102 Steps to be followed for mounting in the panel: STEP 1: Make the opening in the panel and the eight holes for the screws (dimensions in millimetres): See table Hole diameter Steel, nickel, brass, copper Aluminium Plate Thickness and monel plate from plate AKO-21701 PANEL OPENING...
  • Page 103 we make it easy STEP 2: Remove the front cover. STEP 3: Place the user interface inside the space in the panel and fix it into place using the 8 screws supplied. Remark: If an IP65 installation is desired, rubber gasket should be installed correctly between DUOVision and Plate as it is shown in next picture.
  • Page 104 A.5.- Physical dimensions AKO-21801 AKO-21802 AKO-21803 DUOVision 51 mm 280 mm...
  • Page 105 we make it easy Appendix B:- Selection of the DUOControl controller Steps to select the appropriate DUOControl: 1.- Choose the type of control for the fans (ON/OFF or via INVERTER): One table or the other is used depending on this information. 2.- Decide the No.
  • Page 106 The DUOControl model which meets the requirements of the installation is the AKO-21012. If control is carried out using inverter, the controller to select would be the AKO-21006. NOTE: Any of the controllers can carry out the same functions as the one immediately inferior to it in the...
  • Page 107 we make it easy Appendix C:- User Parameters A list of all the user parameters used to configure the operation of DUOControl controllers. The following table contains the following fields: Register Code: User parameter coding used within this manual. Parameter: Text which appears on the screen Description: Description of the parameter R/W?: Type of parameter R: Read only (can be modified within the programming assistant)
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  • Page 116 DUOControl controllers have a MODBUS communication interface to enable them to be controlled and monitored by means of the AKO-5005 Web server or AKO-5004 equipment management software. It is necessary to use the AKO-21904 cable (not supplied) to connect to the local MODBUS network. Function of each wire:...
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  • Page 120 Apartado (P.O. Box), 5 | 08800 Vilanova i la Geltrú | Barcelona | Spain We reserve the right to supply materials that might vary slightly to those described in our Technical Sheets. Updated information is available on our website: www.ako.com.

This manual is also suitable for:

Ako-21012Ako-21018