Emerson EC2-391 User's Manual
Contents
1. EC2 391 Display Case and Coldroom Controller Operating Instructions EMERSON Note This document contains short form instructions for experienced users Use last column in List of Parameters to document your individual settings More detailed information can be found in the User Manual The EC2 391 is a dedicated refrigeration controller with superheat and a driver for an Alco Controls Electric Control Valve EX2 In addition the EC2 391 controls air temperature and manages defrost and fan s Network aS S 3 nemeD eyo So MAr ii p OLET Two ECN Pxx pipe temperature sensors 1 and 2 measure suction gas temperatures at the evaporator inlet outlet and feed the signals into the superheat control loop The superheat controller output modulates the opening of the EX2 pulse width modulated Electrical Control Valve 6 thus optimising the refrigerant mass flow through the evaporator The air temperature sensors 3 and 4 measure air in and out temperature of the evaporator and feed signals into the air temperature thermostat The ECN Fxx fin sensor 5 is used for defrost termination The controller has 3 relay outputs to control the defrost heater 9 the evaporator fan 8 and an optional output 7 Please consult the technical data right for input and output ratings In case of power loss due to the positive shut off characteristics of the EX2 Electrical Control Valves a liquid line solenoid valve2. EI Coil out sensor alarm E2 Air in sensor alarm This Alarm Code is inhibited if no air in sensor used AO r8 and r9 100 E3 Air out sensor alarm This Alarm Code is inhibited if no air out sensor used AO r8 and r9 0 and fin sensor installed d2 1 E4 Fin sensor alarm This Alarm Code is inhibited if no fin sensor used d2 0 Explanations for E0 E4 Alarms No sensor connected or the sensor and or the sensor cable is broken or short circuited Er Data error display out of range Data send to the display is out of range AH High temperature alarm AL Low temperature alarm AE Thermostat emergency operation Air sensor failure system is in continuous cooling mode AF Valve Status Valve closed due to compressor safety loop active Ao Superheat emergency operation Sensor s failure Ar No refrigerant flow detected No refrigerant flow was detected Au Valve open 100 for more than 10 minutes dt Forced defrost termination time or temperature Ft Forced fan startup time or temperature 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 b
3. Replacement for 00 Min Max Unit Def Custom Pump down delay 0 180 sec 0 Compressor will run during pump down delay while valve is closed Drain delay d7 Injection delay 0 180 sec 0 Valve is open during injection delay while compressor is not running ae Demand defrost mode 0 off 1 on 2 on together with timed defrost dd Pulsed defrost differential 1 20 K 2 dH Pulsed defrost setpoint 40 dt C 5 dt Defrost termination temperature 40 90 c 8 Her pi defrost duration 0 180 min 30 dI Defrost interval 0 192 h 8 du Start up delay after synch O 180 min 30 F FAN PARAMETERS F1 Fan startup by 0 on 1 delayed by time Fd error on temperature 2 by temperature Ft error on time 3 first whatever comes first time or temperature no alarm 4 last time and temperature must come no alarm F3 During deros 0 ont of 0 1 Jop F4 Stop dcayime ooo min FS During cleaning Ozom 0 1 0 Fan delay after defrost 0 30 min 0 Ft On temp after defrost 40 40 C 0 u2 MOP control 0 MOP off 1 MOP on MOP temperature Start opening 25 75 30 DIGITAL INPUT PARAMETERS DIGITAL OUTPUT PARAMETERS 00 Output L inverse function 0 1 0 4 Keyboard and IR remote control Temporary data display disabled Control setpoint with SEL key and manual defrost u SUPERHEAT PARAMETERS Te u4 Superheat mode 0 o
4. difference 2 cutin set point difference cut out set point 4 on external control using nvi Valve via SNMP Air in and air out sensor monitoring off Temp alarms will be generated Setpoint night Differential night 0 Mean factor day operation 3 heating deadband control Differential day i Setpoint day d DEFROST PARAMETERS Defrost mode Ea 19 Mean factor night operation 0 0 natural defrost defrost heater not activated pulsed defrost not possible 1 forced defrost defrost heater activated pulsed defrost possible 2 forced defrost defrost heater activated pulsed defrost possible defrost termination using nviStartUp via SNMP dl Termination by 0 termination by temperature termination by time will generate an alarm 1 termination by time termination by temperature will generate an alarm 2 first what ever comes first time or temperature no alarm 3 last by time and temperature no alarm d2 Defrost termination sensor 0 Dedicated defrost sensor must be installed 1 2 1 Air out sensor used for defrost termination 3 temperature dt or max time dP whatever is selected 1 on pulsed defrost dd and dH in use heaters are switched off at dH and switched on again at dH dd 0 no 1 ys 0 1 Jof d5 Delay power up defrost O 180 min 0 d off no pulsed defrost heaters switched off at defrost termination Defrost at startup EC2 391 65136 EN RO1 doc
5. is not needed to prevent flooding of the compressor A Safety instructions Read installation instructions thoroughly Failure to comply can result in device failure system damage or personal injury The product is intended for use by persons having the appropriate knowledge and skills Ensure electrical ratings per technical data are not exceeded Disconnect all voltages from system before installation Keep temperatures within nominal limits e Comply with local electrical regulations when wiring EC2 391 65136 EN RO1 doc Replacement for 00 Technical Data EC2 Series Controller Power supply 24VAC 10 50 60Hz Class II Power aT 20VA max including EX2 Communication LonWorks Interface FTT10 RJ45 connector Plug in connector size Removable screw terminals wire size 0 14 1 5mm Temperature storage 20 65 C operating 0 60 C 0 80 r h non condensing IP65 front protection with gasket 24VDC 4 20mA SPDT contacts AgCdO Inductive AC15 250V 2A Resistive AC1 250V 8A 12A total return current Triac output for EX2 Electrical Control Valve Coil ASC 24V only Mounting The EC2 391 can be mounted in panels with a 71 x S 29 mm cutout See dimensional drawing below for tJ space requirements including rear connectors Push controller into panel cutout 1 Make sure that mounting lugs are flush with outside of controller housing Insert allen key into front pan
6. the LON network Consult the Monitoring Server user manual for more information It is also possible to display live graphical data on the server or to log data containing the control temperature at defined intervals knowledge of today It is intended only for use by persons having the appropriate technical knowledge and skills at their own discretion and risk Since conditions of use are outside of EMERSON s control we cannot assume any liability for results obtained or damages occurred due to improper application This document replaces all former versions Emerson Electric GmbH amp Co OHG Postfach 1251 HeerstraBe 111 D 71332 Waiblingen Germany Phone 49 0 7151 509 0 Fax 49 0 7151 509 200 www emersonclimate eu EC2 391 65136 EN RO1 doc Replacement for 00 4 4 PCN 865 022 21 09 2007
7. 2007 EC2 391 Display Case and Coldroom Controller Operating Instructions EMERSON Recommended Sensor Positions in Detail 1 ECN Pxx coil in temperature sensor Position on the first return bend of the evaporator 2 ECN Pxx coil out temperature sensor Position directly after the evaporator on the common suction line 3 ECN Pxx air in temperature sensor Position in the middle of the cabinet as high as possible 4 ECN Pxx air out temperature sensor Position asymmetric closer to the expansion valve as high as possible 5 ECN Fxx fin temperature sensor Position on the evaporator asymmetric closer to the expansion valve Recommendations for mounting the pipe sensor Insure proper thermal contact by using a metallic pipe clamp or temperature resistant plastic straps Do not use standard plastic tie wraps as used for electrical wiring as they may become loose over time which could result in faulty temperature measurements and poor superheat control performance It is recommended to insulate the pipe temperature sensor with ARMAFLEX or equivalent The recommended position of the pipe sensors 1s between 9 and 3 o clock as shown in the picture EC3_ColdDat cdr Both air temperature sensors should be mounted on spacers in the air duct so that there is airflow around Caution The sensor cables can be extended if necessary The connection must be protected against water and dust The evaporator outlet temperature se
8. C 1 Air in temperature C 2 Air out temperature C 3 Alarm temperature C 4 Defrost termination temperature C 5 Coil in temperature C 6 Coil out temperature C 7 Calculated superheat K 8 Valve opening in 9 Displays defrost status 2 Alarm suppression _O off 1 on 0 1 0 0 5 Temperature Unit Decimal point 7 Display during defrost C 1 F 0 z 0 yes 1 no 0 1 0 E 0 2 0 0 dF defrost mode 1 dF defrost termination temp 2 dF control temperature C Temperature alignment for 1 0 20 20 K F 0 0 A ALARM PARAMETERS AO Mean factor alarm temperature 0 100 100 AT Low temp alarm delay 0 180 min 5 A2 High temp alarm delay 0 180 min 5 A3 Alarm delay after deros 0 180 min 10 AH High temp alarm limit ar 70 c K 40 AL Low temp alarm timit ss an C K 50 Alarm limit type 0 l 0 0 absolute temperatures C 1 relative temperatures K to setpoint r THERMOSTAT PARAMETERS 11 Min setpoint SO 2 c sof l 60 C 40 r2 Setpoint max r 7 13 Day night control O off 1 on 0 1 1 1 l r4 Thermostat mode ol4 0 off no thermostat function continues cooling air in sensor monitoring off no temp alarms generated 1 cooling deadband control cutin set point difference cut out set point 2 cooling modulating thermostat cut in set point cut out set point
9. ds TIME OUT e Press ESC on IR remote control EC2 391 65136 EN RO1 doc Replacement for 00 Defrost Activation A defrost cycle can be activated locally from the keypad e Press the he button for more than 5 seconds a flashing 0 is displayed e Press 4 or be until 12 is displayed password e Press SEL to confirm password The defrost cycle is activated Special Functions The Special Functions can be activated by e Press EJ and IM together for more than 5 seconds a flashing 0 is displayed e Press J or M until the password 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 a or he 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 Clear alarm messages e 2 Cleaning mode The cleaning mode is effectively a manual defrost with the option of the fans on off The cleaning mode should not be us
10. e pressed or a 30 min delay timer will expire or a second wink request is received Node is offline The node is offline and no application is running This is the result of a network management command and will happen for example during node installation dS Defrost standby dP Pump down dF Defrost cycle dd Defrost drain delay dI Defrost injection delay du Defrost start up delay Cn Cleaning CL Alarms are cleared OF Emerson Electric GmbH amp Co OHG 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 believes to be reliable and which are in compliance with technical Visualising Data LON Monitoring Server The EC2 391 has a LON communication interface enabling the controller to be directly connected to a Monitoring Server It can be connected by using the optional cable assembly to a LON network ECC 014 Order No 804 381 with RJ45 to open cable length 3m Neuron ID Service PIN The service pin is available on the display It is used to identify the controller in a LON network Press the button for app 1 second to send the Neuron ID The LED in the left upper corner will indicate the transmission of the Neuron ID The default settings may be modified remotely from the Monitoring Server via
11. ed in order to isolate the application for maintenance purposes e 3 Fans only e 4 Set the electronic control valve to 100 open e 5 Resets all parameters to the factory default setting The controller will indicate oF during the reset and the valve will close Display of Data 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 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 IR LED Logical status of lighting relay LON service LED Logical status of fan relay Logical status of defrost heater relay Alarm condition 2 4 PCN 865 022 21 09 2007 EC2 391 Display Case and Coldroom Controller EMERSON Operating Instructions List of Parameters DISPLAY PARAMETERS Def Custom 1 Value to show 0 Thermostat control temperature with Temp alignment
12. el holes and turn Je clockwise Mounting lugs will turn and gradually ge E 2 move towards panel 2 ka Turn allen key until mounting lug barely touches panel Then move other mounting lug to the same position 3 Tighten both sides very carefully until controller is E secured Do not over tighten as mounting lugs will break easily EMERSON Cutout 71 x 29 mm Electrical Installation Refer to the electrical wiring diagram below for electrical connections A copy of this diagram is labeled on the controller Use connection wires cables suitable for 90 C operation EN 60730 1 S I TN agy EMERSON ra Climate al ce S 1 EX2 i L at ae _ EL p 6 EC2 a Therm EXV 51 Coil in Temp 52 Coil out Temp 53 Air in Temp 54 Air out Temp 55 Def Temp DI S1 S2 S3 EC2 analog inputs are for dedicated sensors only and 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 S4 5 LON 1 4 PCN 865 022 21 09
13. ff S5 input l inverse function 0 1 0 8 0 n0 Functions for output_I alam 0 1 ot enabled 0 u0 Refrigerant 0 R22 1 R134a 40 1 fixed superheat NO Functions for S5 0 normal input 0 H OTHER PARAMETERS HS IR access code o o 1 2 R507 3 R404A 4 R407C 2 l 2 adaptive superheat 1 cleaning 5 day night switch H2 Display access 0 all disabled Caution access to controller only via LON network possible 1 Keyboard enabled Password 5 R410A 6 R124 7 R744A ul Correction glide dp Glide positive values Pressure drop negative values Superheat init setpoint wj K 6 Superheat setpoint min 3 K 3 E Superheat setpoint max w 20 K is 2 only fan 6 compressor safety chain 3 door contact 7 defrost request 4 permanent cooling 8 defrost inhibited 2 IR remote control enabled 3 Keyboard and IR remote control Temporary data display and manual defrost enabled 199 EJ To 199 PCN 865022 21 09 2007 EC2 391 Display Case and Coldroom Controller EMERSON Operating Instructions Formula for Mean Factors AQ r8 r9 Temperature calculation by the following formula Temperature Airin 1 Mean Factor 100 Airou Mean Factor 100 Examples Mean factor 0 Mean factor 100 Mean factor 50 Temperature Air in Temperature Air out Temperature Average between Air in and Air out Alarm Codes EO Coil in sensor alarm
14. nsor should be mounted on the common suction header of the evaporator A calibration correction can be made using the parameter ul see procedure below Setup 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 a flashing 0 is displayed e Press 4 or be until 12 is displayed password e Press SEL to confirm password The first modifiable parameter code is displayed 1 To modify parameters see Parameters modification below Parameter Modification Procedure e Press a or be to show the code of the parameter that has to be changed e Press SEL to display the selected parameter value e Press EJ or FI to increase or decrease the value e Press SEL to temporarily confirm the new value and ia its code e Repeat the procedure from the beginning press 4 or HI to show To exit and save the new settings e 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 secon
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