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Related Manuals for Danfoss AK-PC 551
Summary of Contents for Danfoss AK-PC 551
- Page 1 AK-PC 551 Refrigeration Controller Technical brochure...
- Page 2 Technical brochure RC8CF102 © Danfoss 08-2014 AK-PC 551...
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Page 3: Table Of Contents
Example: Add extra I/O ������������������������������������������������������� 16 Example: Check I/O wiring �������������������������������������������������� 17 Initialize the controllers IO configuration Network setup ������������������������������������������������������������������������� 18 Example: Quick configuration ������������������������������������������� 19 Quick configuration Application table Frequently asked questions (FAQ) ������������������������������������ 22 AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014... -
Page 4: Introduction
The AK-PC 551 is a pack controller for 1 or 2 suction groups of compressors and a common condenser� AK-PC 551 supports a variety of compressor combinations including variable speed, Digital scroll and Stream 4 cylinder compressors�... -
Page 5: Compressor Combinations
Speed control of all fans Step control of all fans Inputs and outputs All in- and outputs of an AK-PC 551 controller can be configured for various functions and signal types: • 8 analogue inputs for pressure transmitters and temperature sensors�... -
Page 6: Basic Operation
Basic Operation Configuration and daily operation of AK-PC 551 is done via the built-in display or via a remote connected display� The display supports multiple languages and engineering units� For a full description of the controller parameters please see the... - Page 7 Alarm priority Alarm activated at Alarm activated at Alarm cleared at To clear an alarm press ESC (X) for 2 sec� Controller information Technical controller information like code number and software version etc� AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014...
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Page 8: View Parameters
Press UP to increace the time Press DOWN to decrease the time Press LEFT / RIGHT to go to hour / minute Press ENTER to save the setting Monday open time Technical brochure RC8CF102 © Danfoss 08-2014 AK-PC 551... -
Page 9: First Time Start Up
Quick configuration is a series of preconfigured applications, setting up inputs and outputs automatically� Parametric setup Parametric setup is for the expert user, who wants to set each parameter individually, adjust or finetune settings� AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014... -
Page 10: Example: Application
Example: Application Application: Digital scroll The configuration and daily operation of the AK-PC 551 will be explained via an application example: AK-PC 551 controls a refrigeration system with two suction groups of compressors and a common air cooled condenser� Refrigerant: R404A... -
Page 11: Example: Wiring Diagram
Pc condensing pressure Comp� 1B Comp� 1B safety Sc3 outdoor temp� Comp� 1A PWM Comp� 2B safety Sd Comp� 1A Comp� 2B Fan safety Fan VSD Connection, lower level Connection, upper level Electrical diagram AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014... -
Page 12: Example: Wizard
5 kW Comp� size: Suction B Po sensor max� range: 12 bar Po sensor min� range: -1.0 bar Setpoint: -30 °C Compressor mode: Single step No� of compressors: Comp� size: 3 kW Technical brochure RC8CF102 © Danfoss 08-2014 AK-PC 551... - Page 13 DOWN to go to the selected menu� Press DOWN to go to the selected menu and finish the It is recommended to check the IO (input / wizard output) configuration before starting the controller� AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014...
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Page 14: Example: Check Io Configuration
Sd discharge temperature for suction A and B * General alarm inputs 1-3 * Saux for general thermostat * * Special features to be enabled through configuration screens. Not part of the wizard setup. Technical brochure RC8CF102 © Danfoss 08-2014 AK-PC 551... -
Page 15: Io Configuration Error
This means that you will have to go into the IO configuration menu of each IO type, select a free input/output and select the missing function (if a function is selectable this is the reason for the IO configuration error alarm)� AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014... -
Page 16: Example: Add Extra I/O
Example: Add extra I/O Add extra I/O The wizard covers all basic functions of the AK-PC 551 pack controller� Additional features can be set through the configuration screens of the suction group or the condenser� In this example we will add a Sd discharge temperature monitoring of both suction groups�... -
Page 17: Example: Check I/O Wiring
3. Check correct wiring of the outputs via the IO manual intialized (main switch ON). control menus Go to Main menu -> IO Configuration -> Analog/Digital outputs Check correct electrical wiring by manually overriding the Digital outputs outputs� Digital output 1 ON AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014... -
Page 18: Network Setup
Baudrate When a network scan is carried out the controller will be identified • "AK-PC 551 - xxxx (MC250000)" - if the control setup unit is saturated temperature� • "AK-PC 551 - xxxx (MC250001)" - if the control setup unit is pressure�... -
Page 19: Example: Quick Configuration
Default is "English" Go to Main menu -> System -> Display Language 3. Set unit of setpoints Go to Main menu -> Plant type Default is "Sat. Temp. " Unit of setpoints AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014... -
Page 20: Application Table
3CDA + 3F 2CDA + 2F 4CSA + FS 4CA + FS 4CA + 4F 3CSA + FS 3CA + FS 3CA + 3 F None After selection the setting returns to "None" Technical brochure RC8CF102 © Danfoss 08-2014 AK-PC 551... - Page 21 Quick configuration table AK-PC 551 Technical brochure RC8CF102 © Danfoss 08-2014...
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Page 22: Frequently Asked Questions (Faq)
PWM valve of a digital compressor must be connected to one of the solid state relays scroll compressor? (SSR) of AK-PC 551 - which are the outputs DO5 or DO6� The PWM valve function cannot be selected for any of the other digital outputs�... - Page 23 The power supply for pressure transmitters with current signal must be connected to the 12 Vdc terminal of AK-PC 551� The signal wire must be connected to the analogue input pin in question�...
- Page 24 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 made without subsequential changes being necessary in specifications already agreed�...
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