Arctiko SF SERIES, Service Manual, Page: 41 / 48

41
5e. Controller Dixell XR30CX
d IX E L
Installing and Operating Instructions
1592020530
1592020530 XR30CX RTC GB r1.0 28.05.2008.doc
XR30CX
1/5
Digital controller with off cycle defrost and AUX relay
XR30CX
CONTENTS
1. GENERAL WARNING ___________________________________________________ 1
2. GENERAL DESCRIPTION _______________________________________________ 1
3. CONTROLLING LOADS _________________________________________________ 1
4. FRONT PANEL COMMANDS _____________________________________________ 1
5. MAX & MIN TEMPERATURE MEMORIZATION _______________________________ 1
6. MAIN FUNCTIONS _____________________________________________________ 1
7. PARAMETERS ________________________________________________________ 2
8. DIGITAL INPUT (ENABLED WITH P3P = N) _________________________________ 3
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS ___________________________ 3
10. X-REP OUTPUT – OPTIONAL ____________________________________________ 3
11. INSTALLATION AND MOUNTING _________________________________________ 3
12. ELECTRICAL CONNECTIONS ____________________________________________ 3
13. HOW TO USE THE HOT KEY_____________________________________________ 4
14. ALARM SIGNALS ______________________________________________________ 4
15. TECHNICAL DATA _____________________________________________________ 4
16. CONNECTIONS _______________________________________________________ 4
17. DEFAULT SETTING VALUES_____________________________________________ 4
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.
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.p.A.” (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 as light, for alarm signalling or as auxiliary output.. It
is also provided with 2 NTC or PTC probe inputs, the first one for temperature control, the
second one, optional, to connect to the HOT KEY terminals to signal the condenser
temperature alarm or to display a temperature. The digital input can operate as third
temperature probe. It’s provided with a Real Time Clock which allows programming of up to 6
daily defrost cycles, divided into holidays and workdays. A “Day and Night” function with two
different set points is fitted for energy saving
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 regulation is performed
according to the temperature
measured by the thermostat probe
with a positive differential from the
set point: if the temperature
increases and reaches set point plus
differential the compressor is started
and then turned off when the
temperature reaches the set point
value again.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “
COn ” and “ COF ”.
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;
Defrost is performed through a simple stop of the compressor. Parameter “ MdF ” controls its
length.
4. FRONT PANEL COMMANDS
: To display target set point; in programming mode it selects a parameter or confirm
an operation.
(DEF) To start a manual defrost
( 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.
To switch the light, if oA1 = Lig
KEY COMBINATIONS:
+
To lock & unlock the keyboard .
+
To enter in programming mode.
+
To return to the room temperature display.
4.1 USE OF LEDS
Each LED function is described in the following table.
LED MODE FUNCTION
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enabled
ON Light on
ON Auxiliary relay on
°C/°F ON Measurement unit
°C/°F Flashing Programming phase
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO SEE THE MIN TEMPERATURE
1.
Press and release the
n
key.
2.
The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the
n
key again or by waiting 5s the normal display will be restored.
5.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the
o
key.
2. The “Hi” message will be displayed followed by the maximum temperature recorded.
3. By pressing the
o
key again or by waiting 5s the normal display will be restored.
5.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1. Hold press the SET key for more than 3s, while the max. or min temperature is
displayed. (rSt message will be displayed)
2. To confirm the operation the “rSt” message starts blinking and the normal temperature
will be displayed.
6. MAIN FUNCTIONS
6.1 TO SET THE CURRENT TIME AND DAY
When the instrument is switched on, it’s necessary to program the time and day.
1. Enter the Pr1 programming menu, by pushing the SET +
n
keys for 3s.
2. The rtc parameter is displayed. Push the SET key to enter the real time clock
menu.
3. The Hur (hour) parameter is displayed.
4. Push the SET and set current hour by the UP and Down keys, then push SET to
confirm the value..
5. Repeat the same operations on the Min (minutes) and dAy (day) parameters.
To exit: Push SET+UP keys or wait for 15 secs without pushing any keys.