EC2-552 Condensing Unit Controller
Contents
1. Scroll compressor 1 0 PO 100 Digital scroll compressor 10 0 PO setpoint pressure 2 control loops with the same suction pressure setpoint PO modulate the compressors The dead band control loop with dead band P1 switches the single stage compressor on or off whereas a PI control loop modulates the Digital Scroll base load compressor between approximately 10 and 100 capacity Being the base load compressor the Digital Scroll Compressor will never be switched off while the single stage compressor remains on The PT5 pressure transmitter 2 senses condensing pressure and feeds the signal into a control loop which generates a 0 10V output signal 10 to modulate condenser fan motor speed by using the Alco Controls FSP Fan Speed Power Module The control algorithm for condensing pressure is generating a proportional transfer characteristic P1 100 0 PO pressure PO is the condensing pressure setpoint for the fan P1 is the proportional pressure band within the fan speed is controlled proportional A Safety instructions e Read installation instructions thoroughly Failure to comply can result in device failure system damage or personal injury e The product is intended for use by persons having the appropriate knowledge and skills e Ensure electrical ratings per technical data are not exceeded e Disconnect all voltages from system before installation e Keep temperatures within nominal limits EC2 552_62. only active when service pin is pressed Display indicates condenser side C2 Display indicates pressure in bar Alarm condition Compressor 2 on Fan on Compressor 1 on Indications On The Display EC2 552_65098_EN_R05 docxx replacement for R04 2 4 Compressor Controller e State e Alarm in combination with alarm message and alarm LED e Suction pressure or saturation temperature from suction pressure e Parameter Condenser fan controller e State e Alarm in combination with alarm message and alarm LED e Condensing pressure or saturation temperature from condensing pressure e Parameter Other display e Pressure Pressure value in bar g e Alarm Alarm condition e IR IR communication enabled Alarm Codes hP High pressure alarm Controller 1 suction pressure higher than the maximum limit Controller 2 condensing pressure higher than the maximum limit IP Low pressure alarm Controller 1 suction pressure lower than the minimum limit Controller 2 condensing pressure lower than the minimum limit dl Discharge temperature alarm Digital scroll only Discharge end temperature is too high EP Error pressure Controller 1 suction pressure sensor failure Controller 2 condensing pressure sensor failure Fr Fast recovery alarm Controller 1 fast recovery from low suction pressure Controller 2 fast recovery from low condensing pressure hr High discharge pressure alarm Controller 1 high discharge pressure recove
3. Delay time for maximum pressure 10sec Pessina P OL Le D High discharge temperature cut out ae ee cee Pe cut in cut out 10 C Compressor serial alarm delay 0 10sec 0 A9 Compressorrun limit 0 99 10000m 0 u STEP ENABLE PARAMETERS Cl u0_ Resetoperatingtime OO 3 OO 0 do nothing 1 reset operating time compressor 1 2 reset operating time compressor 2 3 reset operating time all compressors ul Enable disable compressor O 1 flag 1 f u2 Enable disable compressr2 O 1 flag 1 c APPLICATION PARAMETERS C1 cl Number of compressors Fe 2 2f c4 Compressor control mode 0 2 2 0 compressor 1 in standard control loop 1 compressor 1 act as base load compressor 2 compressor 1 is a digital scroll compressor amp base load Compressor switch logic 0 FILO logic First In Last Out Capacity demand Adds first compressor out of available com pressors compressors where min off time t4 is fulfilled Capacity excess Removes last compressor out of available com pressors compressors where min on time t3 is fulfilled 1 Rotation enabled Capacity demand Adds compressor with lowest runtime out of available compressors where min off time t4 is fulfilled Capacity excess Removes compressor with highest runtimes out of available compressors where min on time t3 is fulfilled c6 Number of compressors to switch on 2 in case of sensor failu
4. EC2 552 Condensing Unit Controller EMERSON Operating Instructions Note This document contains short form instructions for experienced users Use last column in List of Parameters to document your individual settlings More detailed information can be found in the User Manual The EC2 552 has been designed to control single compressor or tandem compressor condensing units with a Copeland Scroll Digital compressor and variable fan speed control The purpose of the controller is to maintain suction pressure at a pre defined level by modulating compressors and to keep condensing pressure to a minimum by varying fan motor speed Network EMERSON The Alco Controls PTS pressure transmitter 1 senses suction pressure The Digital Scroll Compressor 6 operates as the base load compressor Capacity modulation is achieved by temporarily unloading the compressors scroll sets with the Pulse Width Modulated PWM signal 11 which controls the compressor unloading valve 12 In tandem compressor condensing units the single stage compressor 7 will only be turned on when demand exceeds the refrigeration capacity of the Digital Scroll Compressor The discharge temperature thermistor of the Digital Scroll Compressor should be connected to the Disch Temp input 5 of the controller and the volt free digital inputs 3 and 4 should be connected to the serial alarm loops of both compressors for feedback of compressor tripping
5. 5098_EN_RO5 docxx replacement for RO4 e Comply with local electrical regulations when wiring Technical data Power supply 24VAC 10 50 60 Hz Class II 20VA max TCP IP Ethernet 1OMBit s Plug in connector size Removable screw terminals wire size 0 14 1 5 mm Temperature storage 20 65 C operating 0 60 C Output relays SPDT contacts AgCdO Inductive AC15 250V 2A Resistive AC1 250V 8A 12A total return current Mounting The EC2 552 can be mounted in panels with a 71 x 29 mm cutout See dimensional drawing below for space requirements including rear connectors Push controller into panel cutout 1 Make sure that mounting clamps are flush with outside of controller housing Insert allen key into front panel holes and turn clockwise Mounting clamp will turn and gradually move towards panel 2 Turn allen key until mounting clamp barely touches panel Then move other mounting clamp to the same position 3 Tighten both sides very carefully until controller is secured Do not over tighten as mounting clamps will break easily EMERSON Cutout 71 x 29 mm Electrical Installation N X 24V PWM Refer to the electrical wiring diagram 0 40V ACA Comp 1 right for electrical connections A copy of this diagram is labelled on the controller Use connection wires cables suitable for 90 C operation EN 60730 1 EC2 analog inputs are for dedicated sensors only and should not be conne
6. assword is displayed default 12 If password was changed select the new password e Press SEL to confirm password A 0 is displayed and the Special Function mode is activated e Press or to select the function The number of special functions is dynamic and controller dependent See list below e Press SEL to activate the function without leaving the special function mode e Press PRG to activate the function and leave the special function mode Most of the Special Functions work in a toggle mode the first call activates the function and the second call deactivates the function The indication of the function can only be displayed after exiting the special function mode e 0 Display test function e 1 Displays the current TCP IP address e 2 Set the controller TCP IP address to the default value 192 168 1 101 e 3 Resets all parameters to the factory default setting The controller will indicate oF during the reset The data to be shown on the display can be selected by the user In case of an alarm the alarm code is displayed alternately with the selected data The user can inhibit the alarm code Press the SEL button to scroll through all possible displayable data The display will show for one second the numerical identifier of the data and then the selected data After two minutes the display will return to the by parameter 1 selected data o m IR LED Display indicates suction side C1 Ethernet activity LED
7. ate eu EC2 552_65098_EN_RO5 docxx replacement for RO4 4 4 PCN 864923 30 07 2012
8. ayed password Press SEL to confirm password The first modifiable parameter code is displayed 1 To modify parameters see Parameter Modification below Parameter Modification Procedure e Press a or b to show the code of the parameter that has to be changed e Press SEL to display the selected parameter value e Press a or he to increase or decrease the value e Press SEL to temporarily confirm the new value and display its code Repeat the procedure from the beginning press 4 or wlio show To exit and save the new settings Press PRG to confirm the new values and exit the parameters modification procedure To exit without modifying any parameter e Do not press any button for at least 60 seconds TIME OUT e Press ESC on IR remote control Temporary Display Of Data It is possible to temporarily display the values of the different sensors This is a useful feature when initially setting up the system without the aid of the WebPages Press the SEL sequentially The value displayed on the screen corresponds to the number corresponding to the 1 parameter Action only valid when parameter H2 3 Load Default Parameters The default parameter settings can be reloaded into the controller memory by using the special function described below Special Functions The Special Functions can be activated by e Press and IM together for more than 5 seconds A flashing 0 is displayed e Press or b until the p
9. covery Fast Recovery High Discharge Recovery High Discharge Recovery Add capacity request Add capacity request Remove Capacity Request Remove Capacity Request Delayed capacity request Delayed capacity request Priority start set Priority start set Priority stop set Analog output Priority stop set Set point shifted Compressor command 49 00 Set point shifted In Alarm Fan command 75 00 In Alarm EMERSON Emerson Climate Technologies GmbH is not to be held responsible for erroneous literature regarding capacities dimensions applications etc stated herein Products specifications and data in this literature are subject to change without notice The information given herein is based on technical data and tests which Emerson Climate Technologies GmbH believes to be reliable and which are in compliance with technical knowledge of today It is intended only for use by In addition for those customers wishing to connect the controllers into a larger system it is also possible to trap network variables using the SNMP protocol Refer to the User Manual for further details The Monitoring and Alarm WebPages are read only and therefore it is not necessary to enter a username or password A username and password will be requested upon the initial request to any of the other WebPages The factory default settings are Username EmersonID Password 12 The default settings may be modified in the Display configuration page Press the tabs at
10. cted to any other devices Volt free digital inputs should only be connected to serial control loops or relays with gold contacts They should not be connected to any other devices Important Keep controller and sensor wiring well separated from mains wiring Minimum recommended distance 30mm Warning Use a class II category transformer for 24VAC power supply EN 60742 Do not ground the 24VAC lines We recommend to use one transformer per EC2 controller and to use separate transformers for 3 party controllers to avoid possible interference or grounding problems in the power supply Connecting any EC2 inputs to mains voltage will permanently damage the EC2 8 2 A 250V EC2 55x H Suction Condenser Disch RX TX Pressure Pressure Comp1 Comp2 Temp RX TX 1 4 PCN 864923 30 07 2012 EC2 552 Condensing Unit Controller EMERSON Operating Instructions Set up and Parameter Modification Using The Keypad For convenience an infrared receiver for the optional IR remote control unit is build in enabling quick and easy modification of the system parameters when a computer interface is not available Alternatively the parameters can be accessed via the 4 button keypad The configuration parameters are protected by a numerical password The default password is 12 To select the parameter configuration e Press the PRG button for more than 5 seconds e A flashing 0 is displayed Press a or b until 12 is displ
11. e of sensor failure 0 Analog output 0 0 V 1 Analog output 100 10 V Minimum output value Maximum output value 1 Condensing pressure sensor 1 0 maximum value 2 Pressure offset for condensing 1 0 bar Keyboard and IR remote control 0 all disabled pressure H OTHER PARAMETERS Caution access to controller only via network possible 1 Keyboard enabled 2 IR remote control enabled 3 Keyboard and IR remote control enabled IR remote control access code Password PCN 864923 30 07 2012 EC2 552 Condensing Unit Controller EMERSON Operating Instructions Visualising Data WebPages A TCP IP Controller Readme file is available on the www emersonclimate eu website to provide detailed information about TCP IP Ethernet connectivity Please refer to this file if you need information beyond the contents of this instruction sheet The EC2 552 has a TCP IP Ethernet communication interface enabling the controller to be directly connected to a PC or network via the standard Ethernet port The EC2 552 controller has embedded WebPages to enable the user to easily visualise the parameter lists using real text labels No special software or hardware is required Connect the EC2 552 using the optional ECX N60 cable assembly to a network or hub that enables the controller to receive a dynamic TCP IP address If a DHCP server is not available the controller can be connected to a computer using a crossover cable plug
12. ged directly into the Ethernet port In this case the TCP IP address of the computer must be manually modified to be compatible with the default address of the controller Refer to the TCP IP Controller Readme file for more details Open the Internet browser program on the computer and enter the default TCP IP address of the controller into the address line of the Internet browser 192 168 1 101 or the dynamic address from the DHCP server The default communication port is 1030 Refer to the TCP IP Controller Readme file if a specific port is required After a few moments the default monitoring page should be displayed If the browser does not open the default page or display active data the user should check the Internet browser Option configuration Refer to the TCP IP Controller Readme file Monitor Marne Maintenance Sensor Application Setpoint Alarm Actuator Display Manual TCP IP Configuration Configuration Configuration Configuration Configuration Configuration Control Configuration Monitor Compressor stage sensor Digital input l Fan stage sensor Suction pressure 2 97 bar Comp 1 Comp 2 Condensing pressure 15 00 bar Setpoint 3 00 bar Fan z Setpoint 14 00 bar Temperature 12 30 i Temperature 34 89 7c Compressor controller current status Active Relays Fan controller current status Controller disabled Compressor 1 Controller disabled Emergency Stop Compressor 2 Emergency Stop Emergency Run Emergency Run Fast Re
13. he result of a network management command and will happen for example during node installation PCN 864923 30 07 2012 EC2 552 Condensing Unit Controller EMERSON Operating Instructions Controller 1 Compressor controller DISPLAY PARAMETERS Value to be shown on display 0 f 0 0 compressors and fans states controller 1 and 2 suction pressure bar saturation temperature from suction pressure C condensing pressure bar saturation temperature from condensing pressure C Digital Scroll capacity fan speed Digital Scroll discharge temperature C P SET POINT PARAMETERS Cl Pressure set point suction for 1 0 50 bar 3 0 E A E a a A a aa P1 Pressure band control band for P PI 50 bar an ae Placa band forded bandconvolmede P3 Fast recovery from low pressure 9 9 50 bar 99 P8 High discharge pressure recovery 9 9 50 bar 50 t TIME PARAMETERS t1 Time delay before adding capacity 0 99 10sec 3 t2 Time delay before removing capacity 0 99 10sec 3 t3 Compressor minimum on time 0 99 10sec 6 t4 Compressor minimum off time 0 99 10sec 6 t5 Maximum compressor switching O 19 Ihr 0 A ALARM PARAMETERS C1 A2 Minimum suction pressure alarm 1 0 50 bar 1 0 a D B nD A3 Maximum suction pressure alarm 1 0 50 bar D reese Pepe a D A4 Delay time for minimum pressure 10sec umm re OTe a a A5
14. re F MODULATING PARAMETERS C1 F2 Minimum output value 10 10 20 F3 Maximum output value 10 100 100 F6 PWM rate Digital scrol 10 20 sec 20 r SENSOR PARAMETERS C1 rO Suction pressure sensor minimum 1 0 50 bar value O Shown value x 10 Time in seconds Ex a value of 2 means 20 seconds 2 Shown value x 10 000 Time in hours Ex a value of 2 means 20 000 hours EC2 552_65098_EN_R05 docxx replacement for R04 3 4 SENSOR PARAMETERS C1 continued Suction pressure sensor maximum 1 0 50 bar 7 0 value 2 Pressure offset for suction pressure 1 0 bar Refrigerant type 0 no temperature conversion ai en 1 R22 2 R134a 3 R507 4 R404A 5 R407C 6 R407A 7 R407F Controller 2 Fan controller P SET POINT PARAMETERS C2 Pressure set point condensing for fan circuit A ALARM PARAMETERS C2 Minimum condensing pressure 1 0 50 b P Maximum condensing pressure 1 0 50 K Da A4 Delay time for minimum pressure PeT O LAS EE U N 1 Pressure band control band for P PI dead band for dead band control mode Delay time for maximum pressure alarm limit AQ Fanrunlimit u STEP ENABLE PARAMETERS C2 E 0 do nothing 1 reset operating time fan 1 ul Enable disable fani O 1 flag 3 r c APPLICATION PARAMETERS C2 c2 Fan controller operation 0 disabled 1 enabled Fan behaviour on in cas
15. ry Controller 2 high discharge pressure recovery rE Emergency run Controller 1 runs with c6 numbers of compressors Controller 2 runs with c6 numbers of fans El Feedback alarm 1 Controller 1 digital input associated with compressor 1 has changed into alarm state safety chain Controller 2 digital input associated with fan s has changed into alarm state safety chain E2 Feedback alarm 2 Controller 1 digital input associated with compressor 2 has changed into alarm state safety chain nl Service alarm 1 Controller 1 compressor 1 operating time higher than run limit A9 Controller 2 fan operating time higher than run limit A9 n2 Service alarm 2 Controller 1 compressor 2 operating time higher than run limit A9 Er Data error Data send to the display is out of range Messages No data to display The display will show an at node start up and when no data is send to the display In Reset to default values activated The display will show an In when the factory default configuration data set is initialized Id Wink request received The display will show a flashing Id when the wink request was received The flashing Id will be shown on the display until the service button will be pressed or a 30 min delay timer will expire or a second wink request is received This function is action only when using SNMP protocol OF Node is offline The node is offline and no application is running This is t
16. the top of the Monitoring page with a left click of the mouse button to enter the respective Webpage The parameters will be visualised in real text together with the program code as defined in the parameter list below After the parameters have been modified the complete list of settings can be saved to the memory of the computer and used later to upload into another controller This can save a considerable amount of time when using multiple controllers and over a period of time a library can be created containing the parameter lists for equipment for different applications It is also possible to display live graphical data from the controller In addition a permanent 30 days log file containing the control temperature at 15 minutes intervals is stored in the non volatile memory to be later transferred using FTP to the computer The log file can be imported into a standard spreadsheet program such as Excel Refer to the TCP IP Controller Readme file for a complete description of the features available for the TCP IP series of controllers persons having the appropriate technical knowledge and skills at their own discretion and risk Since conditions of use are outside of Emerson Climate Technologies GmbH control we cannot assume any liability for results obtained or damages occurred due to improper application This document replaces all former versions Emerson Climate Technologies GmbH Holzhauser Strasse 180 D 13509 Berlin www emersonclim
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