AK-cc750_eng.pdf

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User Guide
Controller for evaporator control
AK-CC 750
ADAP-KOOL® Refrigeration control systems
Contents
1. Introduction .............................................................................3
Application.................................................................................................. 3
Principles...................................................................................................... 4
2. Design of a controller ..............................................................7
Module survey ........................................................................................... 8
Common data for modules .................................................................10
Controller ...........................................................................................12
Extension module AK-XM 101A .................................................14
Extension module AK-XM 102A / AK-XM 102B .....................16
Extension module AK-XM 103A .................................................18
Extension module AK-XM 204A / AK-XM 204B .....................20
Extension module AK-XM 205A / AK-XM 205B .....................22
Extension module AK-XM 208C ................................................24
Extension module AK-OB 110 ....................................................26
Extension module AK-OB 101A..................................................27
Display module EKA 163B / EKA 164B .....................................28
Transformer module AK-PS 075 / 150 ......................................29
Preface to design ....................................................................................30
Functions............................................................................................30
Connections ......................................................................................31
Limitations .........................................................................................31
Design of a evaporator control ..........................................................32
Procedure: ..........................................................................................32
Sketch ..................................................................................................32
Evaporator and refrigerator appliance functions ................32
Connections ......................................................................................34
Planning table ..................................................................................35
Length .................................................................................................36
Linking of modules .........................................................................36
Determine the connection points ............................................37
Connection diagram ......................................................................38
Supply voltage .................................................................................39
Ordering .....................................................................................................40
3. Mounting and wiring.............................................................41
Mounting ...................................................................................................42
Mounting of extension module on the basic module .......42
Wiring..........................................................................................................43
4. Configuration and operation ................................................45
Configuration ...........................................................................................47
Connect PC ........................................................................................47
Authorization....................................................................................48
Unlock the configuration of the controllers ..........................49
System setup ....................................................................................50
Set plant type ...................................................................................51
Definition of thermostat ...............................................................52
Definition of sections.....................................................................53
Definition of defrost functions ...................................................54
Definition of common functions ...............................................55
Setup general alarm inputs .........................................................57
Setup separate thermostat functions ......................................58
Setup separate voltage functions .............................................59
Configuration of inputs and outputs .......................................60
Set alarm priorities..........................................................................62
Lock configuration ..........................................................................64
Check configuration.......................................................................65
Check of connections ............................................................................66
Check of settings.....................................................................................67
Installation in network ..........................................................................70
First start of control ................................................................................71
Start the control...............................................................................72
Setup logs ..........................................................................................73
Manual defrost.........................................................................................74
5. Regulating functions .............................................................75
Introduction..............................................................................................76
Thermostat function ..............................................................................77
Temperature alarms ...............................................................................81
Common functions ................................................................................82
General monitoring functions ...........................................................85
Liquid injection........................................................................................86
Defrost ........................................................................................................87
Miscellaneous ..........................................................................................92
Information ...............................................................................................95
Alarm texts ................................................................................................96
Appendix - Recommended connection Group 1 ........................98
Appendix - Recommended connection Group 2 ......................102
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RS8EM602 ©
Danfoss
2016-06
AK-CC 750
1. Introduction
Application
AK-CC 750 controllers are complete regulating units which
together with valves and sensors constitute complete evaporator
controls for refrigeration appliances and freezing rooms within
commercial refrigeration.
Generally speaking they replace all other automatic controls
containing, inter alia, day and night thermostats, defrost, fan con-
trol, rail heat control, alarm functions, light control, thermo valve
control, solenoid valve, etc.
The controller is equipped with data communication and is oper-
ated via a PC.
In addition to evaporator control the controller can give signals to
other controllers about the operating condition, e.g. forced clos-
ing of expansion valves, alarm signals and alarm messages.
Advantages
• Control of 1 to 4 evaporator sections
• Adaptive superheat control ensures optimum evaporator usage
in all operational circumstances.
• Electronic injection with AKV valve or ETS valve
• Traditional temperature regulation using on/off or modulating
control of solenoid valve for both DX and indirect brine system.
• Weighted thermostat and alarm thermostat
• Defrost on demand based on evaporator capacity
• Appliance cleaning function
• Light control using door switch or network signal depending on
day/night operation
• Rail heat pulsing depending on day/night operation or dew
point
• Monitoring of door alarm and control of light/refrigeration
depending on location of door switch.
• Log function for registration of historical parameter values and
alarm modes.
Control
The controller’s main function is to control the evaporator so that
the system constantly operates with the most energy-friendly
refrigeration.
A specific function for registration of the need for defrost will
adapt the number of defrosts so that no energy is wasted on un-
necessary defrosts and subsequent cooling-down cycles.
Adaptive defrosting
The AK-CC 750 includes an adaptive defrosting function. By using
the injection valves opening degree as mass flow sensor for the
supply of refrigerant, the controller can monitor ice formation
on the evaporator. If the load is too large for the standard defrost
programme, the controller initiates additional automatic defrost
cycles to eliminate the need for expensive service calls due to
iced-up evaporators.
Evaporator control of one, two, three or four evaporators
Control of cool or frost
room
Control of cool or frost
appliance
SW = 6.6x
AK-CC 750
RS8EM602
©
Danfoss
2016-06
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Principles
The great advantage of this series of controllers is that it can
be extended as the size of the plant is increased. It has been
developed for refrigeration control systems, but not for any
specific application – variation is created through the read-in
software and the way you choose to define the connections.
It is the same modules that are used for each regulation and the
composition can be changed, as required. With these modules
(building blocks) it is possible to create a multitude of various
kinds of regulations. But it is you who must help adjusting the
regulation to the actual needs – these instructions will assist
you to find your way through all the open questions so that the
regulation can be defined and the connections made.
Advantages
• The controller’s size can “grow” as systems grow
• The software can be set for one or more regulations
• Several regulations with the same components
• Extension-friendly when systems requirements are changed
• Flexible concept:
- Controller series with common construction
- One principle – many regulation uses
- Modules are selected for the actual connection requirements
- The same modules are used from regulation to regulation
Controller
Extension modules
Top part
Bottom part
The controller is the cornerstone of the regulation. The module has inputs and
outputs capable of handling small systems.
• The bottom part – and hence the terminals – are the same for all controller types.
• The top part is the intelligence with software. This unit will vary according to con-
troller type. But it will always be supplied together with the bottom part.
• In addition to the software the top part is provided with connection for data com-
munication and address setting.
If the system grows and more functions have to be controlled, the regulation can be
extended.
With extra modules more signals can be received and more relays cut in and out –
how many of them – and which – is determined by the relevant application.
Examples
A regulation with few connections can
be performed with the controller module
alone
If there are many connections one or more exten-
sion modules have to be mounted
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RS8EM602 ©
Danfoss
2016-06
AK-CC 750
Direct connection
Setup and operation of an AK controller must be accomplished via
the “AK-Service Tool” software program.
The programme is installed on a PC, and setup and operation of
the various functions are carried out via the controller’s menu
displays.
Displays
The menu displays are dynamic, so that different settings in one
menu will result in different setting possibilities in other menus.
A simple application with few connections will give a setup with
few settings.
A corresponding application with many connections will give a
setup with many settings.
From the overview display there is access to further displays for
the regulation.
At the bottom of the display there is access to a number of general
functions, such as “time table”, “manual operation”, “log function”,
“alarms”, and “service” (configuration).
Network linking
The controller can be linked up into a LON-network together with
other controllers in an ADAP-KOOL® refrigeration control system.
After the setup operation can be performed at a distance with,
say, our software program type AKM.
Users
The controller comes supplied with several languages, one of
which can be selected and employed by the user. If there are sev-
eral users, they may each have their choice of language. All users
must be assigned a user profile which either gives access to full
operation or gradually limits the operation to the lowest level that
only allows you “to see”.
External display
An external display can be fitted in order to show the air tempera-
tures around the evaporators.
In AK-CC 750 up to 4 displays can be mounted.
AK-CC 750
RS8EM602
©
Danfoss
2016-06
5

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