Emerson XJAL-020Z-CFV-012 Manual page 36

Digital controller with off cycle defrost
XR30CX
CONTENTS
1. GENERAL WARNING ____________________________________________________ 1
2. GENERAL DESCRIPTION ________________________________________________ 1
3. CONTROLLING LOADS __________________________________________________ 1
4. FRONT PANEL COMMANDS ______________________________________________ 1
5. MAIN FUNCTIONS ______________________________________________________ 1
6. PARAMETERS _________________________________________________________ 2
7. DIGITAL INPUT_________________________________________________________ 2
8. TTL SERIAL LINE – FOR MONITORING SYSTEMS ___________________________ 2
9. INSTALLATION AND MOUNTING __________________________________________ 2
10. ELECTRICAL CONNECTIONS_____________________________________________ 2
11. HOW TO USE THE HOT KEY _____________________________________________ 2
12. TECHNICAL DATA ______________________________________________________ 2
13. CONNECTIONS ________________________________________________________ 2
14. DEFAULT SETTING VALUES _____________________________________________ 3
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
This manual is part of the product and should be kept near the instrument for easy and

quick reference.
 The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
 Check the application limits before proceeding.
 Dixell Srl reserves the right to change the composition of its products, even without notice,
ensuring the same and unchanged functionality.
1.2 SAFETY PRECAUTIONS
 Check the supply voltage is correct before connecting the instrument.
Do not expose to water or moisture: use the controller only within the operating limits

avoiding sudden temperature changes with high atmospheric humidity to prevent
formation of condensation
Warning: disconnect all electrical connections before any kind of maintenance.

 Fit the probe where it is not accessible by the End User. The instrument must not be
opened.
In case of failure or faulty operation send the instrument back to the distributor or to "Dixell

S.s.l." (see address) with a detailed description of the fault.
 Consider the maximum current which can be applied to each relay (see Technical Data).
Ensure that the wires for probes, loads and the power supply are separated and far

enough from each other, without crossing or intertwining.
 In case of applications in industrial environments, the use of mains filters (our mod. FT1)
in parallel with inductive loads could be useful.
2. GENERAL DESCRIPTION
Model XR30CX, format 32 x 74 mm, is a digital thermostat with off cycle defrost designed for
refrigeration applications at normal temperature. It provides two relay outputs, one for the
compressor, the other one can be used for defrost heater. The digital input operates to stop
defrost.
The HOT KEY output allows to connect the unit, by means of the external module XJ485-CX,
to a network line ModBUS-RTU compatible such as the dIXEL monitoring units of X-WEB
family. It allows to program the controller by means the HOT KEY programming keyboard.
The instrument is fully configurable through special parameters that can be easily programmed
through the keyboard.
3. CONTROLLING LOADS
3.1 COMPRESSOR
The compressor relay is always closed when the controller is powered except during defrost
and dripping time.
3.2 DEFROST
The defrost interval is controlled by means of parameter "EdF":
- with EdF=in the defrost is made every "IdF" time,
- with EdF = "rtc", the defrost is made in real time depending on the hours set in the
parameters Ld1..Ld6 on workdays and in Sd1...Sd6 in holidays;
Other parameters are used to control defrost cycles: its maximum length (MdF)
4. FRONT PANEL COMMANDS
(DEF) To start a manual defrost
1598030330 XR30CX MRS GB r2.0 23.05.2013.doc
APPENDIX 1
(UP): To see the max. stored temperature; in programming mode it browses the
parameter codes or increases the displayed value.
(DOWN) To see the min stored temperature; in programming mode it browses the
parameter codes or decreases the displayed value.
To switch the instrument off, if onF = oFF.
Not used
KEY COMBINATIONS:
+

+
+
4.1 USE OF LEDS
Each LED function is described in the following table.
LED MODE
ON
Flashing
ON
ON
°C/°F ON
°C/°F Flashing
5. MAIN FUNCTIONS
5.1 CONTROLLER DISPLAY
The controller displays:
- "on" when is powered.
- "dEF" dring a defrost
- "oFF" when it is in stand by.
5.2 HOW TO START A MANUAL DEFROST
5.3 HOW TO CHANGE A PARAMETER VALUE
To change the parameter's value operate as follows:
1. Enter the Programming mode by pressing the Set + n keys for 3s (the "°C" or "°F" LED
starts blinking).
2. Select the required parameter. Press the "SET" key to display its value
3. Use "UP" or "DOWN" to change its value.
4. Press "SET" to store the new value and move to the following parameter.
To exit: Press SET + UP or wait 15s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to
expire.
5.4 THE HIDDEN MENU
The hidden menu Includes all the parameters of the instrument.
5.4.1 HOW TO ENTER THE HIDDEN MENU
1. Enter the Programming mode by pressing the Set + n keys for 3s (the "°C" or "°F" LED
starts blinking).
2. Released the keys, then push again the Set+n keys for more than 7s. The Pr2 label will be
displayed immediately followed from the HY parameter.
NOW YOU ARE IN THE HIDDEN MENU.
3. Select the required parameter.
4. Press the "SET" key to display its value
5. Use o or n to change its value.
6. Press "SET" to store the new value and move to the following parameter.
To exit: Press SET + o or wait 15s without pressing a key.
NOTE1: if none parameter is present in Pr1, after 3s the "noP" message is displayed. Keep the
keys pushed till the Pr2 message is displayed.
NOTE2: the set value is stored even when the procedure is exited by waiting the time-out to
expire.
5.4.2 HOW TO MOVE A PARAMETER FROM THE HIDDEN MENU TO
THE FIRST LEVEL AND VICEVERSA.
Each parameter present in the HIDDEN MENU can be removed or put into "THE FIRST LEVEL"
(user level) by pressing "SET + n".
In HIDDEN MENU when a parameter is present in First Level the decimal point is on.
5.5 HOW TO LOCK THE KEYBOARD
1.
Keep pressed for more than 3 s the UP + DOWN keys.
2.
The "POF" message will be displayed and the keyboard will be locked. At this point it will
be possible only to see the set point or the MAX o Min temperature stored
3. If a key is pressed more than 3s the "POF" message will be displayed.
5.6 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the o and n keys, till the "Pon" message will be
displayed.
XR30CX
To lock & unlock the keyboard.
To enter in programming mode.
To return to the room temperature display.
FUNCTION
Compressor enabled
Anti-short cycle delay enabled
Defrost enabled
An alarm is occurring
Measurement unit
Programming phase
Push the DEF key for more than 2 seconds and a manual defrost will
start.
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