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AK-CC 750A

RS8HP102 © Danfoss 2018-09

77

Thermostat function

Valve type and thermostat

Principle

Up to 4 valves can be connected to the controller; one for every
solid state output.
It is possible to use electrically controlled expansion valves type
AKV (ETS) for regulation, or else injection can take place using
thermostatic expansion valves (TEV) in which the temperature
is regulated using solenoid valves in the liquid line (LLSV), e.g.
Danfoss type EVR.

The thermostat function can be defined in different ways depend-
ing on which application it is used for. For example:
• regulation principle /
• what sensors are to be used /
• whether the user wishes to toggle between two temperature
settings, etc.
It is necessary for at least one air sensor to be fitted for every evap-
orator section. This is applicable irrespective of which thermostat
function is selected – including "

no

" thermostat. The thermostat's

cut-out temperature also has to be set to the correct air tempera-
ture as this value is used by the injection function.

Thermostat type= ON/OFF

One common valve for all evapo common ON/OFF ther-
mostat
A line up of refrigeration appliances which are to be regulated to
the same temperature is a typical example.
The temperature is controlled according to the ON/OFF principle
in accordance with the thermostat settings in section A.

The thermostat can control the temperature via:
• a signal from the S3/S4 sensors in section A, or
• min/max or average temperatures in all the sections used (see

the section on sensor selection)

AKV valve
This principle can also be used with electronic expansion valves
type AKV; e.g. refrigeration appliances where one valve is used for
two evaporators. These appliances are specially designed for this
application as the evaporator area is divided over two refrigeration
sections in order to achieve a consistent load over the two circuits.

One valve for every evap common ON/OFF thermostat
Here, one valve is used per evaporator and the temperature is
controlled according to the ON/OFF principle in accordance with
the thermostat settings in section A

.

The thermostat can control the temperature via:
• a signal from the S3/S4 sensors in section A, or
• min/max or average temperatures in all the sections used (see

the section on sensor selection)

(ETS)

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Содержание AK-CC 750A

Страница 1: ...Controller for evaporator control AK CC 750A User Guide ADAP KOOL Refrigeration control systems...

Страница 2: ...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 Unloc...

Страница 3: ...tat 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 nig...

Страница 4: ...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 ar...

Страница 5: ...o 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...

Страница 6: ...field If you want to know more about a current alarm you can click on it and obtain an information display on the screen A corresponding display exists for all earlier alarms Here you can upload infor...

Страница 7: ...pecific software and by which input and output signals the relevant application will require If it is an application with few connections the controller module top part with belonging bottom part may...

Страница 8: ...ulation is planned set up it will generate a need for a number of connections distributed on the mentioned types This connection must then be made on either the controller module or an extension modul...

Страница 9: ...ed continuously AK CM 102 Communication module Data communication for external exten sion modules Type Function Application AK CC 750A Controller for evaporator control Refrigeration appliances contro...

Страница 10: ...tage must not be connected to the same output group Solid state outputs Can be used for loads that are cut in and out frequently e g rail heat fans and AKV valve Max 240 V a c Min 48 V a c Max 0 5 A L...

Страница 11: ...2018 09 11 Dimensions The module dimension is 72 mm Modules in the 100 series consist of one module Modules in the 200 series consist of two modules Controllers consist of three modules The length of...

Страница 12: ...Address setting When the controller is connected to a gateway type AKA 245 the controller s address must be set between 1 and 119 1 200 at AK SM Service PIN When the controller is connected to the dat...

Страница 13: ...1 12 7 AI 7 13 14 8 AI 8 19 20 9 AI 9 21 22 10 AI 10 23 24 11 AI 11 25 26 12 DO 1 31 32 13 DO 2 33 34 14 DO 3 35 36 15 DO 4 37 38 16 DO 5 39 40 41 17 DO6 42 43 44 18 DO7 45 46 47 19 DO8 48 49 50 24 25...

Страница 14: ...pply voltage The supply voltage to the module comes from the previous mod ule in the row Supply voltage to a pressure transmitter can be taken from either the 5 V output or the 12 V output depending o...

Страница 15: ...2 1 zz bar U 0 5 V 0 10 V On Off Ext Main switch Day Night Door Defrost Active at Closed Open Point 5 6 7 8 Type AI5 AI6 AI7 AI8 Point 1 2 3 4 Type AI1 AI2 AI3 AI4 Terminal 9 12 V Terminal 10 5 V Term...

Страница 16: ...on The module contains 8 inputs for on off voltage signals Signal AK XM 102A is for low voltage signals AK XM 102B is for high voltage signals Supply voltage The supply voltage to the module comes fro...

Страница 17: ...11 12 7 DI 7 13 14 8 DI 8 15 16 Point Signal Active at DI Ext Main switch Day Night Door Defrost Closed voltage on Open voltage off Point 5 6 7 8 Type DI5 DI6 DI7 DI8 Point 1 2 3 4 Type DI1 DI2 DI3 D...

Страница 18: ...ious module in the row Supply voltage to a pressure transmitter can be taken from either the 5 V output or the 12 V output depending on transmitter type Galvanic isolation The inputs are galvanically...

Страница 19: ...0 10 V On Off Ext Main switch Day Night Door Level switch Active at Closed Open AO 0 10 V Point 5 6 7 8 Type AO1 AO2 AO3 AO4 Point 1 2 3 4 Type AI1 AI2 AI3 AI4 Point Terminal 9 12 V Terminal 10 5 V Te...

Страница 20: ...to over ride the relay s function Either to position OFF or ON In position Auto the controller carries out the control Light emitting diodes There are two rows with LED s They indicate the following L...

Страница 21: ...Active at 1 DO 1 25 27 2 DO 2 28 30 3 DO 3 31 33 4 DO 4 34 36 5 DO 5 37 39 6 DO 6 40 41 42 7 DO 7 43 44 45 8 DO 8 46 47 48 Signal Active at DO Fan Alarm Light Railheat Defrost Night blind Valve Compr...

Страница 22: ...ight change over switches at the front make it possible to over ride the relay s function Either to position OFF or ON In position Auto the controller carries out the control Light emitting diodes The...

Страница 23: ...050 AKS 32 P0 Pc Paux AKS 32R AKS 2050 MBS 8250 1 xx bar AKS 32 1 zz bar U 0 5 V 0 10 V On Off Ext Main switch Day Night Door Defrost Active at Closed Open DO Fan Alarm Light Rail heat Defrost Night b...

Страница 24: ...ssary if the valves need to open close during a power failure Light emitting diodes There is one row with LED s It indicate the following Voltage supply to the module Communication active with the bot...

Страница 25: ...n CCMT Point 1 2 3 4 5 6 7 8 Type AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 Terminal 17 12 V Terminal 18 5 V Terminal 19 20 Cable screen The screen on the pressure transmitter cables must only be connected at t...

Страница 26: ...The supply voltage to the module comes from the controller module Placing The module is placed on the PC board in the controller module Point The two outputs have points 24 and 25 They are shown on th...

Страница 27: ...rts up the display will show the output that is connected 1 output A 2 output B etc Placing The extension module can be placed at a distance of up to 15 m from the controller module Point No point has...

Страница 28: ...ler Supply voltage 230 V a c or 115 V a c from 100 V a c to 240 V a c Placing On DIN rail Effect Type Output tension Output current Power AK PS 075 24 V d c 0 75 A 18 VA AK PS 150 24 V d c adjustable...

Страница 29: ...The 24 V can be sourced from the same supply that supplies the controller The supply for the communication module is galvani cally separated from the connected extension modules The terminals must not...

Страница 30: ...ge over switches switches that can override the indi vidual relays into either OFF or ON position Data communication The controller module has terminals for LON data communication The requirements to...

Страница 31: ...upply When programming the pressure trans mitter s pressure range must be set ON OFF voltage inputs DI This signal must be connected to two terminals The signal must have two levels either 0 V or volt...

Страница 32: ...appliance functions Make a sketch of the system in question Follow these 12 steps AK CC 750A Application Control of cold room or freezing room x Control of refrigeration or freezing appliances x Regu...

Страница 33: ...pe AKV The function cannot be used in combination with pulsation of fans If you want to know more about the functions go to chapter 5 A bit more about the functions Common thermostat The thermostat te...

Страница 34: ...inputs which can be used for monitoring and alarm function On Off inputs Contact function on an analog input or voltage signal on an extension module External start stop of regulation Pulse pressure o...

Страница 35: ...s Inject ON Start of defrost pulse pressure Door contact Night setback General DI alarm inputs 1 10 Open close Night blind pulse pressure On off outputs AKV valves 3 Solenoid valves in liquid line Fan...

Страница 36: ...hether there is connection to the connected modules This status can be followed by the light emitting diode When the two catches for the DIN rail mounting are in open posi tion the module can be pushe...

Страница 37: ...d for the programming Columns 2 and 4 are used for the connection diagram Example continued Signal Module Point Terminal Signal type Active at Air temperature S3A 1 1 AI 1 1 2 Pt 1000 Air temperature...

Страница 38: ...at dwg and dxf You may then yourself write the module number in the circle and draw the individual connections Example continued AKV A S3A 3 x EKA 163B S3B 1 1 1 2 2 3 3 4 4 5 6 7 8 12 13 14 15 16 17...

Страница 39: ...be necessary to safeguard the voltage to the controller and valves using UPS Transformer size The power consumption grows with the number of modules used Module Type Number Effect Controller 1 x 8 8...

Страница 40: ...ation module Data communication for external extension mod ules 080Z0064 Type Function Application Language Code no Example continued AK CC 750A Controller for evaporator control 1 2 3 or 4 sections E...

Страница 41: ...ing This section describes how the controller Is fitted Is connected We have decided to work on the basis of the example we went through previously i e the following modules AK CC 750A controller modu...

Страница 42: ...K assembly 2 Assemble the extension module and the basic module The basic module must not be connected to voltage In our example one extension module is to be fitted to the basic module The sequence i...

Страница 43: ...t 1000 Air temperature S4C 6 AI 6 11 12 Pt 1000 Defrost sensor S5A 7 AI 7 13 14 Pt 1000 Defrost sensor S5B 8 AI 8 19 20 Pt 1000 Defrost sensor S5C 9 AI 9 21 22 Pt 1000 Gas temperature S2A 10 AI 10 23...

Страница 44: ...vice Pin When the controller is set correct on the network the LED sta tus will flash quickly for 10 minutes 6 The controller is now ready to be configured The connections for the example can be seen...

Страница 45: ...nfiguration and operation This section describes how the controller Is configured Is operated We have decided to work on the basis of the example we went through previously i e a frost appliance with...

Страница 46: ...Refrigeration 3 AKV valves Superheat measured with P0 and 3 S2 sensors S3 is alarm sensor S4 is thermostat sensor Night setback on 3K Defrost The defrost is stopped individually based on temperature...

Страница 47: ...view of it will always appear In case the overview is empty This is because the controller has not yet been set up The red alarm bell at the bottom right tells you that there is an active alarm in the...

Страница 48: ...ecific system and a corresponding access code for this person The controller will utilize the same language that is selected in the service tool but only if the controller contains this language If th...

Страница 49: ...ation lock can be Unlocked Configuration lock The controller can only be fully configured when the configuration lock is set to Un locked The settings are only applied when it is set to Locked again A...

Страница 50: ...ayed in here Alarm text can be in a different language to the operating language Clock When the time is set the PC s time can be transferred to the controller When the controller is connected to a net...

Страница 51: ...ue with the settings and check the values If you change some of the settings the new values will come into force Number of evaporators Select the number of evaporators that you want the controller to...

Страница 52: ...d The temperature is controlled individual by ON OFF in each evaporator section 1 valve per evaporator individual modulating thermostat Here one valve per evaporator is used The temperature is control...

Страница 53: ...ation Display control Select whether you want to connect to display type EKA 163B EKA 164B to indicate the appliance temperature for section A Set tings are non weighted S3 S4 or product temperature s...

Страница 54: ...fans should be on during defrost Defrost stop method Define whether defrost is to be concluded with Time Temperature individual in each section or Tempera ture common for all sections Defrost term sen...

Страница 55: ...nd thermostat cutout Fan night eco at EC or VSD Fan speed during night operation and thermostat cutout EC min start speed at EC or VSD Lowest speed the first 10 seconds after start Fan stop on S5 Sele...

Страница 56: ...r alarm delay If the door has been open for more than the time delay set here a door alarm is triggered Light control Select whether the light should be controlled by a door switch a day night signal...

Страница 57: ...unction can be used to monitor all kinds of digital signals No of inputs Set the number of digital alarm inputs Adjust for each input Name Delay time for DI alarm Alarm text Setup general alarm inputs...

Страница 58: ...sensors Each thermostat has a separate outlet to control external automation No of thermostats Set the number of general thermostats 1 5 For each thermostat adjust Name Which of the sensors is used A...

Страница 59: ...m message via the data communication Setup separate voltage functions 3 Voltage inputs The general volt inlet can be used to monitor external voltage signals Each volt inlet has a separate outlet to c...

Страница 60: ...DO7 1 18 ON Rail heat DO8 1 19 ON We set up the controller s digital outputs by keying in which module and point on this module each one of these has been connected to We furthermore select for each...

Страница 61: ...Bar AKS 32 1 20 Bar AKS 32R 1 20 Bar AKS 32 1 34 Bar AKS 32R 1 34 Bar AKS 32 1 50 Bar AKS 32R 1 50 Bar AKS 2050 1 59 Bar AKS 2050 1 99 bar AKS 2050 1 159 bar MBS 8250 1 159 Bar Voltage signals for re...

Страница 62: ...larms that are current They will be shown with text in the three pictures All alarms that can occur can be set for a given order of priority High is the most important one Log only has lowest priority...

Страница 63: ...priorities for Various alarms Press the button to go on to the next page 6 Set Alarm priorities for General functions Configuration continued In our example we select the settings shown here in the d...

Страница 64: ...rison of selected func tions and define inputs and outputs The result can be seen in the next section where the setup is controlled Configuration continued Press in the field against Configuration loc...

Страница 65: ...t number on the selected mod ule had been set up for something different The error is corrected by setting up the output correctly Remember that the setup must be unlocked be fore you can change modul...

Страница 66: ...s controls requires that the setup is locked By means of the manual control of each output it can be checked whether the output has been correctly connected Activate the various functions the door swi...

Страница 67: ...check that all the settings are as they should be The overview display will now show one line for each of the general functions Behind each icon there is a number of displays with the different setti...

Страница 68: ...ress the blue overview button at the bottom left of the display and then press the defrost symbol 10 Settings for defrost 11 Go to defrost schedule Press the schedule button to continue to the defrost...

Страница 69: ...starts Use the copying functions if there are several days with identical defrosts The end result with two defrosts per 24 hours can be seen here above 14 Go to common functions Press the blue overvie...

Страница 70: ...row of the two other address switches must point at 0 2 Push the Service Pin Press down the service pin and keep it down until the Service Pin LED lights up 3 Wait for answer from the system unit Depe...

Страница 71: ...remove cancelled alarms from the alarm list 5 Check active alarm again In our case we have a series of alarms We will tidy them up so that we only have those that are relevant In our case an active al...

Страница 72: ...ttom of the display 2 Start control First start of control continued Press in the field against Main switch Select ON The controller will now start the controlling when the external function switch is...

Страница 73: ...start display for new logs Start by defining which type of log has to be defined Here it is determined which parameters have to be included in the setup of data Select a function here then a paramete...

Страница 74: ...74 RS8HP102 Danfoss 2018 09 AK CC 750A Manual defrost 1 Go to Configuration menu 2 Select defrost 3 Start defrost If you want to carry out manual defrost proceed as follows Activate...

Страница 75: ...AK CC 750A RS8HP102 Danfoss 2018 09 75 5 Regulating functions This section describes how the different functions work...

Страница 76: ...need for defrost will adapt the number of defrosts so that no energy is wasted on un necessary defrosts and subsequent cooling down cycles Among the different functions can briefly be mentioned Contr...

Страница 77: ...common valve for all evaporators common ON OFF ther mostat A line up of refrigeration appliances which are to be regulated to the same temperature is a typical example The temperature is controlled ac...

Страница 78: ...ossible stable superheating This ensures that the cooling process takes place as quickly as possible In the case of stable loads the thermostat will reduce the open ing time for the AKV valve so the t...

Страница 79: ...ed on the basis of the air temperature sen sors S3 S4 or both Definition of the thermostat temperature takes place using one setting which is based on the S4 value With a setting of 100 only the S4 me...

Страница 80: ...ation is to take place When a Night blind is used the distribution of air in the appliance will change radically A change of the thermostat s weighted S3 S4 ratio will therefore be required As a rule...

Страница 81: ...re For too high temperature during normal regulation For too high temperature during cooling down after activation of internal or external start stop during a defrost after a power failure after appli...

Страница 82: ...arge fans In order to prevent this situation the controller can stop the fans if the temperature at S5 exceeds a set limit value The function can also be used as a sort of MOP function during start up...

Страница 83: ...s possible to open them using a switch signal on the digital input If this input is activated the night blinds will open and the refrigeration appliance can be filled with new products If the input is...

Страница 84: ...minutes of the end of forced closing defrosting will restart the moment forced closing ends Alarm relay If the controller is to give alarm at a relay output the relay must be defined A setting determ...

Страница 85: ...her use one of the sensors used by the control function Po Pc or an independent sensor Paux1 Paux2 Paux3 Cutin and cutout limits are set for the pressure control Coupling of the pressure control s out...

Страница 86: ...to all sections When regulating with a flooded evaporator three separate superheat settings are used It is the installer s responsibility to ensure that signal loss to the controller will not result i...

Страница 87: ...e and a drain valve A time delay can be set which defers opening of the hot gas valve Defrost start Defrost can be started in several ways Once started it will continue until a defrost stop signal is...

Страница 88: ...n the evaporator outlet For large evaporators there should be two S5 sensors S5 1 and S5 2 The defrost is stopped when both temperatures have at tained the set value If the defrost time exceeds the se...

Страница 89: ...rted is set meas ured always with the S5 sensors The max permissible time delay in minutes is set The time delay for fan start will not commence until the time delay for liquid injection if applicable...

Страница 90: ...be used if one of the following refrigerants are used for regulation R23 R513B R13B1 or user defined This function can only cancel planned defrosts which start from a defrost schedule either an inter...

Страница 91: ...on the evapora tor but it may also be due to reduced air flow as a consequence of severe over stacking of goods or dropout of fans After this alarm the function will not cancel defrosts This alarm is...

Страница 92: ...on the appliance with the heaviest load Forced refrigeration The controller will undertake refrigeration when this signal is received Refrigeration will continue until the signal is removed The funct...

Страница 93: ...ntroller will shut down and restart 4 Once the controller has restarted open parameter 093 and the configuration lock is opened value 0 5 If AKV stepper valves are used you must also select refrigeran...

Страница 94: ...his value hat to be set in a RMS value Some valve manufacturers are using peak current Soft Landing after Valve Init At power on the valve is performing a valve Initialization i e closing the valve wi...

Страница 95: ...KM menu description for further details Regulating status The controller goes through some regulating situations You can see the actual situation here When operating with AK ST the text is written on...

Страница 96: ...densing pressure faulty Paux1 sensor error High Paux1 sensor error Paux1 pressure transmitter signal faulty Paux2 sensor error High Paux2 sensor error Paux2 pressure transmitter signal faulty Paux3 se...

Страница 97: ...alarm input DI x Stepper valve High Stepper Inj A B C D Open coil Shorted output Error Power failure Check supply to the actual valve System alarms The alarm priority can not be altered on system ala...

Страница 98: ...Door Main s Po AKV A AKV B Def A Def B Suction Comp Room 3 Air S3 S2A S3A S2B S2C For cl Door Main s Po AKV A AKV B AKV C Light Rail heat Comp Room 3 El S3 S2A S3A S5A S2B S5B For cl Door Main s Po A...

Страница 99: ...15 pt 16 High temp Low temp Fan Alarm 1 Fan Alarm 2 3 Fan Alarm 4 5 Fan Alarm 6 Fan Alarm 7 8 Fan Alarm 47 48 Rail heat Comp Fan Alarm Suction Drain Light 10 12 Fan Alarm 9 11 Fan Alarm 13 Def C Rail...

Страница 100: ...KV A AKV B Def A Def B Rail heat Comp CO2 2 El S3 S4 S2A S3A S4A S5A S2B S3B S4B S5B For cl Main s Po AKV A AKV B Def A Def B CO2 2 evap 2 El S3 S4 S2A S3A S4A S5 1A S2B S3B S4B S5 1B For cl Main s Po...

Страница 101: ...heat Comp Fan Alarm Suction Drain Light Blinds 62 Fan Alarm 35 Fan Alarm S2C S3C S4C Light 51 Fan Alarm S2C S3C S4C Light Blinds 71 Def C S2C S3C S4C S5C Rail heat Comp Fan Alarm Light 36 37 Def C S2...

Страница 102: ...A S5A Clean Blinds Po AKV A Def Blinds Rail heat Gas S3 S4 S2A S3A S4A S5A Clean Blinds Po AKV A Def Suction Drain Blinds Rail heat 2 Air S3 S4 S2A S3A S4A S2B S3B S4B Clean Blinds Po AKV A AKV B Blin...

Страница 103: ...Def C Def D Rail heat Light Fan 37 38 Def C Def D Rail heat Light Fan Suction Drain 39 40 Light Fan 1 Light Fan 2 3 Light Fan 4 5 Light Fan 11 Light Fan 12 13 Light Fan 14 15 Light Fan 21 Light Fan S...

Страница 104: ...A LLSV B LLSV C LLSV D Def A Def B Gas S3A S4A S3A S4A S5A S5B S5C S5D Door LLSV A LLSV B LLSV C LLSV D Def A Def B Case 1 Air S3 S4 S3A S4A Clean Blinds LLSV A Blinds Rail heat EL S3 S4 S3A S4A S5A...

Страница 105: ...ht Fan 57 58 Light Fan 59 60 Light Fan 66 Light Fan 67 68 Suction Drain Rail heat Light Fan 69 70 Light Fan 76 Def C Def D Rail heat Light Fan 77 78 Def C Def D Rail heat Light Fan Suction Drain 79 80...

Страница 106: ...es 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 specificat...

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