Dixell UNIVERSAL XR60CX Installation And Operating Instructions Manual

Dixell UNIVERSAL XR60CX Installation And Operating

GENERAL DESCRIPTION

Model Universal-XR is a 71×29 mm format microprocessor-based controller, suitable for applications on high, medium, or
low temperature refrigeration units. It is provided with three relay outputs to control the compressor, defrost, which can be both electrical and hot gas, and evaporator fans. It can work with PTC or NTC probes. Where defrost is being terminated by time, it can operate with just one thermostat probe. Where defrost is being terminated by temperature, it has an input for an evaporator probe(s).

The Universal-XR is equipped with a flashing visual alarm and buzzer. Each instrument is fully configurable through special parameters that can be easily programmed through the keypad.

QUICK START UP PROCEDURE – Up and running in 5 easy steps

This Quick Start Up section is designed to get you up and running with the minimum of fuss. Just follow these 5 simple steps.

STEP 1

Install the new Universal-XR per the installation instructions included with the controller.

STEP 2

Turn on power, THEN WITHIN 1 MINUTE COMPLETE STEPS 3, 4, AND 5.

STEP 3

Press the “SET” and “DOWN” keys for 3 seconds, and the controller will automatically recognise and adjust itself to the type of probes connected. (The display briefly shows tPd followed by ntC or PtC).

STEP 4

Press the “AUX/tC” key for 3 seconds, and the setting of parameter tC is displayed. Use the UP or DOWN keys to adjust to the required setting, then confirm by pressing SET (see table 1 below).

STEP 5

Press SET for 3 seconds until the °C or °F icon starts to flash, then adjust the SET POINT using the UP or DOWN keys, then press SET again to confirm.

Notes:

1. All probes must be of the same type, either PTC or NTC.
2. Probes must be between –58 to 140°F for auto recognition to work.
3. If 1 minute expires before you have completed quick set up, either cycle the power OFF then ON to start the set up again or enter Pr2 as per the instructions and adjust your parameter settings manually.

Installation and Operating Instructions

Parameter “tC” settings

Note: As you change parameter tC, defaults change and should be approximately correct for that application, but we strongly recommend you check all parameter default values listed in these instructions to ensure they suit your particular application and make further adjustments if necessary.

PARAMETER TABLE and factory default settings

IMPORTANT: Always set parameter “tC” first. As you move “tC” between settings 1 to 7, all non-relevant parameters will be masked.

After setting “tC”, it will be possible to modify all the other relevant parameters.

Once the program is completed, you may want to save the parameter map to a Hot Key. If the “tC” is changed after final programming, the parameters will be changed back to the default listed below.

WARNING!!

Always switch the power OFF and then ON at the end of programming to update any parameter changes.

Make sure you connect the correct number of probes to suit the setting of parameter tC. Failure to do this will cause probe alarms.

Any probe alarms can be cleared by turning them off / on.

BUTTONS AND THEIR FUNCTIONS

SINGLE BUTTON FUNCTIONS

PROGRAMMING MODE

USER PROGRAMMING LEVEL – PR1

To enter programming level Pr1 (user programming level), keep both SET and DOWN buttons pressed for 3 sec. The first parameter label will appear. Browse the parameter list by using the UP or DOWN keys. Press SET to see a parameter’s current value and the UP or DOWN keys to alter its value. Press SET to confirm change (the display will blink for 3 sec and then the next parameter will appear) or by waiting for the menu timeout to expire (15 sec). If no parameter is available for changes in Pr1 level, a noP label will be shown.

PROTECTED PROGRAMMING LEVEL – PR2 (ALL VISIBLE PARAMETERS CAN BE FOUND HERE)

First, enter Pr1 level (as described above), then with any parameter label displayed, keep both SET and DOWN buttons pressed for 8 sec. The first parameter label will appear. Browse the parameter list by using the UP or DOWN keys. Press SET to see a parameter’s current value and the UP or DOWN keys to alter its value. Press SET to confirm change (the display will blink for 3 sec and then the next parameter will appear) or by waiting for the menu timeout to expire (15 sec).

From Pr2 level it is also possible to add or remove any parameter to / from Pr1 by pressing both SET & DOWN while its label is displayed.

Accessibility of any particular parameter via Pr1 level is confirmed by the alarm LED lighting up while its label is displayed.

WARNING: If no button is pressed for 15 seconds, any modified value will be stored in memory, and the controller will return to the normal display mode.

HOT KEY PROGRAMMING

Once a control has been programmed, it is possible to save the program from that control to a HOT KEY for programming another control or a backup of the program.

HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)

1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push the UP key; the “uPL” message appears, followed by a flashing “End”
3. Push the “SET” key, and the End will stop flashing.
4. Turn OFF the instrument and remove the “Hot Key”, then turn it ON again.

NOTE: The “Err” message is displayed for failed programming. In this case, push the UP key again if you want to restart the upload or remove the “Hot key” to abort the operation.

HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY (DOWNLOAD)

1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically, the parameter list of the “Hot Key” is downloaded into the Controller memory, the “doL” message is blinking, followed by flashing “End”.
4. After 10 seconds, the instrument will restart working with the new parameters.
5. Remove the “Hot Key”.

NOTE: The message “Err” is displayed for failed programming. In this case, turn the unit off and then on if you want to restart the download again, or remove the “Hot key” to abort the operation.

THERMOSTAT OVERRIDE (not available when parameter tC = 1)

For rapid chilling or freezing, the thermostat can be overridden by pressing the UP button until the Thermostat icon lights up. The compressor will run in continuous mode for the time period set in parameter CCt. Normal operation will then resume automatically after the CCt is exhausted or when the CCS is exhausted (Continuous Cycle Set Point). The cycle can also be terminated manually by pressing the UP button again for about 3 seconds.

DEFROST TYPES

• tdF = 0: defrost is electrical;
• tdF = 1: defrost is by hot gas.

EVAPORATOR FAN CONTROL (only when parameter tC = 6 or 7)

The fan control mode is selected by means of the “FnC” parameter:

Note: Fans will stop if the temperature value set in the parameter “FSt” is exceeded.

Parameter FSt sets the fan stop temperature. This is the maximum temperature, detected by the evaporator probe, above which the evaporator fans will stop.

Leave FSt above ambient temperature during commissioning to avoid fan short cycle.

After finishing the defrost phase, there is a standstill drain time, set by parameter Fdt. When this period has expired, the refrigeration cycle commences, but the evaporator fans remain off until the Fnd (fan delay) times out.

SPECIAL APPLICATIONS – DEAD BAND CONTROL

DEAD BAND CONTROL (COOLING & HEATING) tc=7

With [oAb = db], the compressor relay controls cooling as normal, but the 3rd (auxiliary/ fan) relay is used to control a heater. The value entered in parameter HY will now be set equal on both sides of the SET POINT. Example: if [HY = 1°C], that will create a 2°C Dead Band.

At [SET POINT + HY], cooling switches on. At [SET POINT – HY], the heating switches on. Either cooling or heating switch off when the temperature returns to the SET POINT.

COMMUNICATIONS WITH XWEB or OTHER MONITORING SYSTEMS

Using the XJ485CX-00000, it is possible to network the Universal XR60CX to the XWEB monitoring systems or a third-party system. The controller has TTL communications that can be converted with the XJ485CX key. The key is connected to the control via the HOT KEY port, with a small 5-wire cable. It is then possible to set a unique address via the “Adr” parameter. Then, using a two-wire communications daisy chain, the controls can be monitored.

ALARMS

MUTING ALARM BUZZER & RELAY

The alarm buzzer can be muted by pressing any button. The controller will briefly show the reset “rES” label. Parameter tbA defines how the alarm relay will respond to the muting of the buzzer.

• tbA = n: The alarm relay will remain active until the alarm condition is rectified.
• tbA = Y: The alarm relay deactivates when the buzzer is muted.

In either case, the display will flash an alarm label until the condition is rectified.

REMOVING SECURITY LEVEL PROTECTION

It is possible to allow access to any parameter from the Pr1 level. To do this, go into Pr2 as previously described. Scroll to the label of the parameter you require and then press the SET and DOWN buttons in quick succession. The decimal point LED will be on, indicating that access to this particular parameter is now possible from the Pr1 level. Its label will now appear when in the Pr1 programming level, and its value can be altered. To restore security level protection, use the same procedure (the decimal point LED will go out after pressing both buttons).

MOUNTING

The Universal-XR should be mounted in a panel, in a 29mm (1.14”) x 71mm (2.8”) hole, and fixed using the special brackets supplied. The ambient temperature for correct operation is 32 to 140°F. Avoid places subject to strong vibrations, corrosive gases, excessive dirt, or humidity (20 to 85% non-condensing RH is the recommended working range). Make sure air can freely circulate through the cooling holes and slots at the rear side of the controller.

TROUBLESHOOTING

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