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Emerson Dixell CX660 Remote Display Unit for XM679 Case Controller. Slave module XM660K, XM669K, XM670K, XM679K. Keyboard 6 push buttons. Resolution 0.1°C or 1°F. Relative humidity 20÷85%. Storage temperature.
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3 VALVE TYPE 6.5 ABSOLUTE MAXIMUM POWER XM678D is able to drive a wide range of stepper valves, on the following table are indicated the maximum values of current that the actuator can supply to the stepper wiring. The TF20D Dixell transformer has to be used. NOTE: the electrical power absorption of the valve can be unrelated to refrigeration power that valve has. Before using the actuator, please read the technical manual of the valve supplied by the manufacturer and check the maximum current used to drive the valve in order to verify that they are lower than those indicated below. Rpp = pressure value read from remote location (only for slave devices).
Examples of error messages: dpp = Err the local transducer read a wrong value, the pressure is out of the bounds of the pressure transducer or the P5C parameter is wrong. Check all these options and eventually change the transducer; rpf the remote pressure transducer is on error situation. Check the status of the onboard GREEN LED: if this LED is OFF the LAN is not working, otherwise check the remote transducer. BIPOLAR VALVES (4 wires) UNIPOLAR VALVES (5-6 wires) 6.6 KEYBOARD DISPLAY CX660 The XM678D board can operate also without keyboard.
Maximum Current 0.9A Maximum Current 0.33A Polarity: Terminal 34 - Terminal 35 + Use twisted shielded cable AWG 18 or less in case of long distance. Max distance: 30m LAST CHECKS ABOUT SUPERHEAT On the fast access menu: dpp is the value read by the pressure gauge; dp6 is the value read by the temperature probe, temperature of the gas on the outlet section of the evaporator; SH is the value of the superheat. The na or Err messages mean that the superheat has no sense in that moment and its value is not available HOW TO CONNECT MONITORING SYSTEM 1) Terminals 36 - and 37 +. 2) Use shielded twisted cable.
For example Belden 8762 o 8772 or cat 5 cables. 3) Maximum distance 1Km.
4) Don t connect the shield to the earth or to GND terminals of the device, avoid accidental contacts by using insulating tape. 6.7 LAN CONNECTION Follow next steps to create a LAN connection, which is a necessary condition to perform synchronized defrost (also called master-slave functioning): 1) connect a shielded cable between terminals 38 - and 39 + for a maximum of 8 sections; 2) the Adr parameter is the number to identify each electronic board. Address duplication is not permitted, in this case the synchronized defrost and the communication with monitoring system is not guaranteed (the Adr is also the ModBUS address).
For example, a correct configuration is the following: If the LAN is well connected, the green LED will be ON. If the green LED blinks then the connection is wrongly configured. The max distance allowed is 30m 6.8 SENSORS FOR SUPERHEAT CONTROL Temperature probe: Pb6 terminals 19 - 20 without any polarity.
Select the kind of sensor with P6C parameter. Pressure transducer: Pb5 terminals: 21 = input of the signal; 22 = Power Supply for 4to20mA transducer; 20 = GND; 23 = +5Vdc power supply for ratiometric pressure transducer. Select the configuration of the transducer with parameter P5C.
6.9 HOW TO USE ONLY ONE PRESSURE TRANSDUCER ON MULTIPLEXED APPLICATIONS A working LAN connection is required (green LED lit on all XM678D boards of the same LAN). Connect and configure a pressure transducer only on one XM678D of the network. Afterwards, the value of pressure read by the unique transducer connected will be available to each device connected to the same LAN. Only one device for each LAN has to be connected to the RS485 connection. The Adr parameter is the number to identify each electronic board.
Address duplication is not permitted, in this case the synchronized defrost and the communication with monitoring system is not guaranteed (the Adr is also the ModBUS address) DIGITAL INPUTS 1) The terminals from 30 to 33 are all free of voltage; 2) Use shielded cable for distance higher than one meter; For each input, has to be configured: the polarity of activation, the function of the input and the delay of signaling. The parameters to perform this configuration are i1p, i1f, i1d respectively for polarity, functioning and delay. The i1p can be: cl = active when closed; op = active when opened. The i1f parameter can be: EAL = external alarm, bal = serious lock alarm, PAL = pressure switch alarm, dor = door switch, def = external defrost, AUS = auxiliary activation command, LiG = light activation, OnF = board On/OFF, FHU = don t use this configuration, ES = day/night, HdY = don t use this configuration. Then there is i1d parameter for delay of activation. For the others digital inputs there are a set of the same parameters: i2p, i2f, i2d, i3p, i3f, i3d ANALOG OUTPUT Selectable between 4 to 20mA and 0 to 10Vdc. Use CABCJ15 to perform the connections It s located near the terminal 39 on a 2-pin connector.
It s possible to use the output to control anti-sweat heaters through a chopped phase controller XRPW500 (500watt) or family XV.D or XV.K. BATTERY BACK UP CONNECTION 7.1 CONNECTION OF XEC SUPERCAP XEC Supercap is designed to be used with Dixell products (XM678D, XEV, IEV and others); compatibility with Dixell devices has to be verified in the user manual/technical sheet of the device. In case of dubt, please contact Dixell Service department.!!!!! XEC Supercap and XM678D must be powered by two different transformers; the failure of the observance of this rule may result in damage to the XEC Supercap and / or the connected XM678D.
By pressing UP ARROW button, the user will be able to enter a fast selection menu and to read the value of the following parameters: dpp = measured pressure (only on master device); dp5 = value of temperature obtained from pressure temperature conversion; Wiring connection XM678D Terminal 61 (+) Terminal 62 (-) XEC Terminal 4 (12Vdc) Terminal 3 (gnd) XM678D GB r XM678D 3/16. 4 8.4 HOW TO MODIFY THE SET POINT FOR AIR TEMPERATURE REGULATION The thermostat set point is the value that will be used to regulate the air temperature. The regulation output is controlled by the electronic valve or by the relay. BEGIN Value modification EXIT or Press SET button for 3 sec, the measurement units will blink together.
With the arrows it s possible to change the value within the LS and US parameters value. By pressing SET it is possible to confirm the value that will blink for about 2 sec. 7.2 EMERSON ECP-024 CONNECTION The Emerson ECP-024 rechargeable accumulator can be connected to the XM678D to close the stepper valve in case of power interruption.
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Wiring connection XM678D ECP-024 Terminal 61 (+) Terminal + Terminal 62 (-) Terminal - About conditions of use and limitation please refer to the ECP-024 manuals. USER INTERFACE 8.1 DIRECT COMMAND INTERFACE In any case, it is possible to wait for about 10 sec to exit. In order to show the air temperature set is sufficient to press and release the SET button, the value is displayed for about 60 sec. HOW TO PROGRAM THE PARAMETERS (PR1 AND PR2) The device provide 2 programming levels: Pr1 with direct access and Pr2 protected with a password (intended for experts). ACCESS to Pr1 Select item Show value or Press and hold for about 3 sec to have access to the first programming level (Pr1). Select the parameter or submenu using the arrows.
Press SET button. Modify or Use the arrows to modify the value. Confirm and store EXIT 9.1 HOW TO HAVE ACCESS TO PR2 Press SET key: the value will blink for 3 sec, and then the display will show the next parameter. Instantaneous exit from the programming mode, otherwise wait for about 10 sec (without press any button). To enter Pr2 programming menu: 1. Access to a Pr1 menu by pressing both SET+DOWN keys for 3 sec, the first parameter label will be showed; 2.
Press DOWN key till the Pr2 label will be showed, then press SET; 3. The blinking PAS label will be showed, wait some seconds; 4. Will be showed with blinking 0: insert the password 321 using the keys UP and DOWN and confirming with SET key.
GENERAL STRUCTURE: The first two item rtc and EEV are related to submenus with others parameters. 8.2 ICONS Light Cooling output Fan Defrost AUX Auxiliary relay Energy saving Multimaster Enabled With icon ON the output is active, while with blinking icon there is a delay. MEASUREMENT UNIT C, Bar and (time) are ON depending on the selection. Generic alarm Clock / time DURING PROGRAMMING: blink the measurement units of temperature and pressure 8.3 KEYBOARD COMMANDS Single commands: LIGHT relay AUX relay Manual defrost ON/OFF Energy Saving Double commands: Press light button. Press down arrow. Press and hold for 3 sec the defrost button Press for 3 sec the ON/OFF button (if the function is enabled). Press for 3 sec the ON/OFF button (if the function is enabled).
Press and hold for about 3 sec to lock (Pon) or unlock (PoF) the keyboard. Pressed together to exit from programming mode or from menu; on submenus rtc and EEV this combination allow to come back to previous level. Pressed together for 3 sec allow to access to first level of programming mode. SET+UP keys on rtc or EEV submenus allow coming back to parameter list, SET+UP keys on parameter list allow immediate exit. 9.2 HOW TO MOVE PARAMETER FROM PR1 TO PR2 AND VICE VERSA Enter on Pr2; select the parameter; press together SET + DOWN; a left side LED ON gives to the parameter the presence on Pr1 level, a left side LED OFF means that the parameter is not present on Pr1 (only Pr2). FAST ACCESS MENU This menu contains the list of probes and some values that are automatically evacuate by the board such as the superheat and the percentage of valve opening. The values: np or nop stands for probe not present or value not evacuate, Err value out of range, probe damaged not connected or incorrectly configured.
Entering fast access menu By press and release the UP arrow. The duration of the menu in case of inactivity is about 3 min. The values that will be showed depend on the configuration of the board XM678D GB r XM678D 4/16. 5 Use or arrows to select an entry, then press to see the value or to go on with other value. HM Access to clock menu or reset of the RTC alarm; An Value of analog output; SH Value of superheat. Na = not Available; opp Percentage of valve opening. Dp1 (Pb1) Value read by probe 1.
Dp2 (Pb2) Value read by probe 2. Dp3 (Pb3) Value read by probe 3. Dp4 (Pb4) Value read by probe 4. Dp5 (Pb5) Temperature read by probe 5 or value obtained from pressure transducer. Dp6 (Pb6) Value read by probe 6. Dpp Pressure value read by (Pb5) transducer.
Rpp Virtual pressure probe, only on slave. L t Minimum room temperature; H t Maximum room temperature; dpr Virtual probe for room temperature regulation rpa and rpb; dpd Virtual probe for defrost management dpa; dpf Virtual probe for fan management FPA; rse Real thermoregulation set point: the value includes the sum of SET, HES and/or the dynamic set point if the functions are enabled. Exit Pressed together or wait the timeout of about 60 sec 11. MENU FOR MULTIMASTER FUNCTION: SEC The function section SEC is enabled when icon is lit. It allows entering in the remote programming mode, from a keyboard not physically connected to the board, through the LAN functionality. Action Button or display Notes Enter menu Press UP arrow for about 3 sec, the icon will be ON.
Waiting for The menu to change the section will be SEC action entered. SEC label will be displayed. Press SET to confirm. The following list will Enter section be available to select the proper network list function. To gain access only to the local device. LOC To gain access to all the devices connected ALL to the LAN.
Select proper Or SE1 function To gain access to the device with 1st Adr (.) SEn SE8 To gain access to the device with 8th Adr (.) Select and confirm an entry by pressing SET Confirm button. Press SET and UP together or wait about 10 Exit menu seconds.
(.) The devices on the LAN are indexed by using the Adr parameter (in ascending order). To modify the same parameter values in all the devices connected to the LAN: enter multimaster menu. Select and confirm ALL. Exit from multimaster menu. Enter the programming menu and change the required parameter values.
The new values will be changed on all devices connected to the LAN. To modify a parameter value in the device with Adr = 35: find the relevant indexed section (the one linked to Adr = 35). Enter multimaster menu.
Select and confirm this section from the multimaster menu. Exit from multimaster menu.
Enter the programming menu and change the required parameter value. If the alarm nod is present: enter the multimaster menu. Select and confirm the LOC section. Exit from multimaster menu.
AT THE END OF THE PROGRAMMING PROCEDURE, SELECT THE SECTION LOC. IN THIS WAY THE ICON 11.1 SYNCHRONIZED DEFROST WILL BE SWITCHED OFF!! The synchronized defrost allow to manage multiple defrost from different boards connected through the LAN connection. In this way, the boards can perform simultaneous defrosts with the possibility to end them in a synchronized way. The Adr parameter cannot be duplicated because in this case the defrost cannot be correctly managed. BEGIN Press for 3 seconds, the rtc or other will be showed.
The measurement unit blinks. Find Adr Modify Adr EXIT or Press more than once the DOWN arrow to find the Adr parameter, the press SET. Set the value of Adr parameter, then press SET to confirm the parameter. Press the two keys together to exit from menu or wait for about 10 seconds. The LSn and LAn parameter are only to show the actual settings (read only).
Se the following example of configuration: DAILY DEFROST FROM RTC: EdF = rtc IdF Parameter: for safety reason force the value of Idf at +1 respect to the interval between two Ld parameters. The IdF timer is reinitialized after defrost and at every power-on. DEFROST START: at the time selected by the parameters Ld1 to Ld6 or Sd1 to Sd6. DEFROST END: if the probes reach the dte temperature or for maximum MdF time. SAFETY and RtC or RtF ALARM: with clock alarm the device will use the parameter IdF, dte and MdF. WARNING: don t set EdF = rtc and CPb = n.
MULTIMASTER DEFROST: all the probes with clock Table for example Par. Unit A (RTC) Unit B (RTC) Unit C (RTC) Adr n N + 1 N + 2 EdF rtc (clock) rtc (clock) rtc (clock) IdF 9 hours safety 9 hours safety 9 hours safety MdF 45 min safety 45 min safety 45 min safety dte 12 C safety 12 C safety 12 C safety Ld1 06:::00 1 Ld2 14:::00 2 Ld3 22::: COMMISSIONING 12.1 CLOCK SETTING AND RTC ALARM RESET If the clock is present: EdF = rtc enable the defrost from rtc Ld1 to Ld6. BEGIN Display Display EXIT UP arrow (press once) to access the fast access menu HM identify the clock RTC submenu; press HUr = hour press to confirm/modify Min = minutes press to confirm/modify don t use others parameters if present. Press for about 10 sec. The operation resets the RTC alarm.
Note: the rtc clock menu is present also on the second level of parameters. Warning: if the board shows the rtf alarm, the device has to be changed ELECTRONIC VALVE SETTINGS Some parameters have to be checked: 1 Superheat temperature probe: Ntc, Ptc, Pt1000 with parameter P6C. The sensor has to be fixed at the end of the evaporator. 2 Pressure transducer: 4 to 20mA or ratiometric P5C = 420 or 5Vr with parameter P5C. 3 Range of measurement: check the parameter of conversion PA4 and P20 that are related to the transducer. TRANSDUCER: -0.5/7Bar or 0.5/8Bar abs the correct setup is relative pressure with PA4 = -0.5 and P20 = 7.0. The 0.5/12Bar abs the correct setup is relative pressure with PA4 = -0.5 and P20 = Example of virtual pressure with unique 4 to 20mA or 0 to 5V transducer: Param.
XM6x8D1 XM6x8D2 + with XM6x8D3+ without transducer transducer without transducer Adr n n + 1 n + 2 LPP LPP = n LPP = Y LPP = n P5C LAN or not connect LAN or not connect P5C= 420 or 0-5V the probe the probe PA4 Not used -0.5 bar Not used P20 Not used 7.0 bar Not used 4 From EEV submenu: select the correct kind of gas with FTY parameter. 5 Use the following parameters to setup the right valve driving, according to the valve datasheet from the manufacturer XM678D GB r XM678D 5/16 6 teu Type of Stepper motor: up-bp it permits to select the kind of valve.
Up = 5-6 wires unipolar valves; bp = 4 wires bipolar valves;!!!!! By changing this parameter the valve has to be reinitialized. Tep Predefined valve selection: 0 to 10 if tep = 0 the user has to modify all the parameters of configuration in order to use the valve. If tep is different from 0 the device performs a fast configuration of the following parameters: LSt, ust, Sr, CPP, CHd.