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Installing and Operating Instructions
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1592018110 XR460C GB r1.0 04.07.2005 XR460C 1/5
XR460C
DUAL TEMPERATURE CONTROLLER
Contents
1. GENERAL WARNING __________________________________________________________ 1
2. GENERAL DESCRIPTION_______________________________________________________ 1
3. TEMPERATURE CONTROL _____________________________________________________ 1
4. DEFROST ___________________________________________________________________ 1
5. CONTROL OF EVAPORATOR FANS (ONLY FOR SECTION 1)_________________________ 1
6. THE DISPLAY ________________________________________________________________ 1
7. PARAMETER LIST_____________________________________________________________ 2
8. DIGITAL INPUT _______________________________________________________________ 4
9. INSTALLATION AND MOUNTING_________________________________________________ 4
10. ELECTRICAL CONNECTIONS ___________________________________________________ 4
11. SERIAL LINE _________________________________________________________________ 4
12. USE OF THE PROGRAMMING “HOT KEY “ ________________________________________ 4
13. ALARM SIGNALS______________________________________________________________ 4
14. TECHNICAL DATA_____________________________________________________________ 5
15. WIRING CONNECTIONS _______________________________________________________ 5
16. DEFAULT SETTING VALUES____________________________________________________ 5
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 XR460C, 32x74 mm format, is a microprocessor based controller, able to control 2
temperatures in an independent way.
The first section is suitable for applications on medium or low temperature refrigerating units. It is
provided with 3 relay outputs to control compressor, defrost - which can be either electrical or hot
gas - and the evaporator fans. It is also provided with 2 NTC or PTC probe inputs, one for
temperature control the other one to control the defrost end temperature of the evaporator.
The second section is suitable for applications on medium or normal temperature refrigerating
units, with timed defrost. It’s provided with 1 relay output to control compressor. It is also provided
with 1 NTC/PTC probe inputs, for temperature control.
There are two digital inputs (free contact) completely configurable by parameter.
The standard TTL output allows the user to connect, by means of a TTL/RS485 external module, a
ModBUS-RTU compatible monitoring system and to programme the parameter list with the “Hot
Key”.
3. TEMPERATURE CONTROL
3.1 THE COMPRESSOR 1 (2)
For each section, the regulation is
performed according to the
temperature measured by its own
thermostat probe with a positive
differential from the set point.
If the temperature increases and
reaches set point1 (2) plus
differential1 (2) the compressor is
started and then turned off when the
temperature reaches the set point
value again.
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “COn1(2)” and “COF1(2)”.
4. DEFROST
4.1 SECTION 1
For the section 1 two defrost modes are available through the “tdF1” parameter:
tdF1= rE defrost with electrical heater
tdF1= in or hot gas.
The defrost interval is control by means of parameter “EdF”:
rtc (only for instruments with RTC): beginning of defrost cycles is set by the L1d1÷L1d6
parameters during the working days and S1d1÷S1d6 during the holidays
in the defrost is made every “IdF” time
Sd the interval “IdF” is calculate through Smart Defrost algorithm (only when the compressor is ON)
At the end of defrost the drip time is controlled through the “Fdt” parameter.
4.2 SECTION 2
For the section 2 the defrost interval is control by means of parameter “EdF2”: with EdF=in the
defrost is made every “IdF2” time, with EdF2=Sd the interval “IdF2” is calculate through Smart
Defrost algorithm (only when the compressor 2 is ON).
Defrost is performed through a simple stop of the compressor2. Parameter “IdF2” controls the
interval between defrost cycles, while its length is controlled by parameter “MdF2”.
4.3 RELATION BETWEEN DEFROSTS
Different kinds of defrosts are available for each section.
The relation between defrosts is set by the dFS parameter: relation between defrosts.
4 relation between the 2 sections of the controller are available, to manage different kinds of
applications:
in = independent defrosts;
StS = same defrost start, synchronised defrost end;
St = same defrost start, independent defrost end;
SE = sequential defrost;
4.3.1 dFS= in - independent defrosts
The defrosts of the 2 sections of controller are completely independent.
First section: defrost interval is set by idF1 parameter.
Second section: defrost interval is set by idF2 parameter.
The defrost interval is control by means of parameter “EdF1(2)”:
in the defrost is made every “IdF” time
Sd the interval “IdF” is calculate through Smart Defrost algorithm (only when the compressor is ON)
Manual defrost activation, by pushing the DOWN key (defrost 1) or UP key (defrost 2).
By pushing the Down key or Up key for 3s, a defrost request is generated for section 1 or 2
respectively. The defrost interval is re-loaded.
4.3.2 dFS = StS – Same defrost star t, end defrost synchronised or dFS = St
- Same defrost start, end defrost independent.
The defrost of the 2 sections of controller starts at the same time. idF1 parameter sets the def rost
interval for both the sections. The defrosts are performed at regular interval if EdF1 = in or according
to the Smartdefrost algorithm if EdF1 = Sd.
With dFS = StS regulation restarts only when defrost is finished for bot h the sections. The section
that finishes the defrost before the other starts dripping time until also the other sect ion has not
finished its defrost.
Manual defrost activation, by pushing the DOWN key (defrost 1) or UP key (defrost 2).
By pushing the Down key or Up key for 3s, a defrost request is generated for both the sections 1 and
2. The defrost interval is re-loaded.
With dFS = St each section restarts regulation as soon as its defrost is finished.
4.3.3 dFS = SE – sequential defrost
The defrost of 2 sections is synchronised. idF1 parameter sets the defrost interval for both the
sections. Defrosts are performed at regular interval if EdF1 = in or according to the Smartdefrost
algorithm if EdF1 = Sd. Section 1 does its defrost first, at the end of the defrost of section 1, section
2 starts its defrost..
Manual defrost activation, by pushing the DOWN key (defrost 1) or UP key (defrost 2).
By pushing the Down key or Up key for 3s, a defrost request is generated for both the sections 1 and
2. The defrost interval is re-loaded.
5. CONTROL OF EVAPORATOR FANS (ONLY FOR SECTION 1)
Section 1 has 1 relay to control evaporator fan.
The fan control mode is selected by means of the “FnC1” parameter:
FnC1=C-n fans will switch ON and OFF with the compressor and not run during defrost:;
FnC1= O-n fans will run continuously, but not during defrost
After defrost, there is a timed fan delay allowing for drip time, set by means of the “Fnd1” parameter.
FnC1=C-y fans will switch ON and OFF with the compressor and run during def rost;
FnC1=O-y fans will run continuously also during defrost
An additional parameter “FSt1” provides the setting of temperature, detected by the evaporator
probe, above which the fans are always OFF. This can be used to make sure circulation of air only if
his temperature is lower than set in “FSt1”.
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6. THE DISPLAY
X----C
XR40 0
The display is divided in 2 parts:
Upper left part: to see the temperature2 (upper display)
Lower left part: to see the temperature1(lower display)
6.1 THE KEYBOARD
SET1 To display and modify target set point1; in programming mode it selects a parameter or
confirm an operation.
To switch on/off the instrument: by holding it pressed f or 5s the instrument is switched in
stand by mode.
SET2 To display and modify target set point 2.
o/
(UP/DEFROST 2) in programming mode it browses the parameter codes or increases
the displayed value. By holding it pressed for 3s the defrost for section 2 is started
.
n/
(DOWN/DEFROST 1) in programming mode it browses the parameter codes or
decreases the displayed value. By holding it pressed for 3s the defrost for section 1 is started
o + n
To lock and unlock the keyboard.
SET +
n To enter the programming mode.
SET +
o To exit the programming mode.
6.2 MEANING OF THE ICONS
6.2.1 I
con
FUNCTION
6.2.2 Meaning
ON Celsius degree
ON Fahrenheit degree
ON Compressor 1 on
FLASHING Anti-short cycle delay enabled for compressor 1
ON Compressor 2 on
FLASHING Anti-short cycle delay enabled for compressor 2
ON Defrost 1 in progress
FLASHING Drip time in progress for section 1
ON Defrost 2 in progress
ON Fan enabled
FLASHING Drip time in progress
ON ALARM signal
6.3 HOW TO SEE AND MODIFY THE SET-POINT
Push and release the SET1 or SET2 key:
the bottom display shows the label St1 or St2
the upper display shows the Set point value flashing
To change the Set value push the o or n within 15s.
To memorise the new set point value push the SET1 or SET2 key again or wait 15s.
6.4 HOW TO START A MANUAL DEF ROST F OR THE SECTION 1 OR SECTION 2
To start a defrost for the section 1: push the DOWN key( ) for 3s.
To start a defrost for the section 2: push the UP key(
) for 3s.
6.5 HOW TO ENTER T HE “PR1” PARAMETER LIST
To change the parameter’s value operate as follows:
Enter the Programming mode by pressing the Set1 and DOWN key for 3s
The controller will show the first parameter present in the Pr1 menu:
Bottom menu: label
Upper menu: value
To exit: Press SET + UP or wait 15s without pressing a key.
6.6 HOW TO ENTER IN PARAMET ERS L I ST “PR2”
To access parameters in “Pr2”:
Enter the “Pr1” level.
Select “Pr2” – “PAS” parameter and press the “SET1” key.
The flashing value “0 - - ” is displayed. use o or n to input the security code and confirm the figure
by pressing “SET” key.
The security code is “321”.
If the security code is correct the access to “Pr2” is enabled by pressing “SET1” on the last digit.
Another possibility is the following:
After switching ON the instrument, within 30 seconds, push SET1 + n keys together for 3s: the Pr2
menu will be entered.
6.7 HOW TO MOVE A PARAMETER FROM T HE “PR2” MENU TO “PR1” AND VICE VERSA.
Each parameter present in “Pr2” MENU can be removed or put into “Pr1”, user level, by pressing
“SET1 + n”.
In “Pr2” when a parameter is present in “Pr1” the decimal point LE of the bottom display is on.
6.8 HOW TO CHANGE A PARAMETER
To change a parameter value operates as follows:
Enter the Programming mode
Select the required parameter.
Press the “SET1” key and the value starts blinking.
Use “UP” or “DOWN” to change its value.
Press “SET1” to store the new value and move to the following parameter.
TO EXIT: Press SET1 + o 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.
6.9 HOW TO LO CK T HE KEYBOARD
Keep pressed for more than 3 s the o and n keys.
The “POF” message will be displayed and the keyboard will be locked. At this point it will be possible
only to see the set points.
If a key is pressed more than 3s the “POF” message will be displayed.
6.10 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the o and n keys, till the “Pon” message will be
displayed.
6.11 ON/OFF FUNCTION – HOW TO SWITCH ON AND OFF THE CONTROLLER
If the function is enabled (par. onF=yES), by pressing the SET1 key for more than 5s the controller
is switched OFF. The stand-by function switches OFF all the relays and stops the regulation. During
the stand by if a monitored unit is connected, it does not record the instrument data and alarms
To switch the instrument on again press the SET1 key for 5s.
NOTE1: When the instrument is under Stand-by, all the relays are under power supply. Don’t
connect any loads to the normal closed contact of the relays.
NOTA2: With the instrument in stand-by, it’s possible to see and modify the set points and enter the
programming mode.
7. PARAMETER LIST
DIFFERENTIALS
Hy1 Differential1: (0,1÷25,5°C; 1÷45°F): Intervention differential for set point1, always positive.
Compressor1 Cut IN is Set Point Plus Differential1 (Hy1). Compressor1 Cut OUT is when the
temperature reaches the set point1.
Hy2 Differential2: (0,1÷25,5°C; 1÷45°F): Intervention differential for set point2, always positive.
Compressor2 Cut IN is Set Point2 Plus Differential2 (Hy2). Compressor2 Cut OUT is when the
temperature reaches the set point2.
REGULATION – SECTION 1
LS1 Minimum set point1 limit: (-50,0°C÷SET1; -58°F÷SET1) Sets the minimum acceptable value
for the set point1.
US1 Maxi mum set point1 limit: (SET1
÷110°C; SET1÷230°F) Set the maximum acceptable value
for set point1.
OdS1 Outputs activation delay of section 1 at start up: (0÷255 min) This function is enabled
at the initial start up of the instrument and inhibits any output act ivation of the section 1 for the
period of time set in the parameter. (Light can work)
AC1 Anti-short cycle delay for co mpressor1: (0÷30 min) interval between the compressor1 stop
and the following restart.
Con1 Compressor1 ON time with faulty probe1: (0÷255 min) time during which the compressor1
is active in case of faulty thermostat probe. With COn=0 compressor1 is always OFF.
COF1 Compressor1 OFF time with faulty probe1: (0÷255 min) time during which the compressor
is off in case of faulty thermostat probe. With COF=0 compressor is always active.
CH1 Kind of action for secti on 1: CL = cooling; Ht = heating
REGULATION – SECTION 2
LS2 Minimum set point2 limit: (-50,0°C÷SET2; -58°F÷SET2) Sets the minimum acceptable value
for the set point2.
US2 Maxi mum set point2 limit: (SET2
÷110°C; SET2÷230°F) Set the maximum acceptable value
for set point2.
OdS2 Outputs activation delay of section 2 at start up: (0÷255 min) T his function is enabled at
the initial start up of the instrument and inhibits any output activation of the section 1 for the
period of time set in the parameter.
AC2 Anti-short cycle delay for co mpressor2: (0÷30 min) interval between the compressor2 stop
and the following restart.
Temperature2
Temperatature1
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Con2 Compressor2 ON time with faulty probe2: (0÷255 min) time during which the compressor2
is active in case of faulty thermostat probe. With COn=0 compressor2 is always OFF.
COF2 Compressor2 OFF time with faulty probe2: (0÷255 min) time during which the compressor
is off in case of faulty thermostat probe. With COF=0 compressor2 is always active.
CH2 Kind of action for section 2: CL = cooling; Ht = heating
DISPLAY
CF Temperature measurement unit: °C = Celsius; °F = Fahrenheit. When the measurement unit
is changed the SET point and the values of some parameters have to be modified.
rES Resolution (for °C): (in = 1°C; de = 0,1°C) allows decimal point display. dE = 0,1°C; in = 1 °C
Lod1 Bottom display visualization: select which probe is displayed by the instrument in the bottom
display: P1 = Thermostat1 probe; P2 = Evaporator probe; P2 = Thermostat2 probe
Lod2 Upper display visualization: select which probe is displayed by the instrument in the upper
display: P1 = Thermostat1 probe; P2 = Evaporator probe; P2 = Thermostat2 probe
DEFROST
dFS relation between defrosts.4 relation between the 2 sections of the controller are available, to
manage different kinds of applications:
in = independent defrosts;
StS = same defrost start, synchronised defrost end;
St = same defrost start, independent defrost end;
SE = sequential defrost;
tdF1 Defrost type, section 1: rE = electrical heater (Compressor OFF);
in = hot gas (Compressor and defrost relays ON)
EdF1 Defrost mode, section 1:
in = interval mode. The defrost starts when the time “IdF1” is expired.
Sd = Smartdefrost mode. The time IdF (interval between defrosts) is increased only when the
compressor is running (even non consecutively).
SdF1 Set point for SMARTDEFROST, section 1: (-30
÷30 °C/ -22÷86 °F) evaporator temperature
which allows the IdF counting (interval between defrosts) in SMARTDEFROST mode.
dtE1 Defrost termination temperature, section 1: (-50,0÷110,0°C; -58÷230°F) (Enabled only
when the evaporator probe is present) sets the temperature measured by the evaporator probe
which causes the end of defrost.
IdF1 Interval between defrosts, section 1: (1÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF1 (Maximum) duration of defrost, section 1: (0÷255 min) When P2P = no, no evaporator
probe, it sets the defrost duration, when P2P = yES, defrost end based on temperature, it sets
the maximum length for defrost.
tPF1 Pre-defrost time: (0÷30min) The compressor is activated for this time before a hot gas
defrost.
Fdt1 Drain down time, section 1: (0÷60 min.) time interval between reaching defrost termination
temperature and the restoring of the control’s normal operation. This time allows the evaporator
to eliminate water drops that might have formed due to defrost.
dPo1 First defrost after start-up, section 1: y = Immediately; n = after the IdF time
EdF2 Defrost mode, secti on 2:
in = interval mode. The defrost starts when the time “IdF2” is expired.
Sd = Smartdefrost mode. The time IdF (interval between defrosts) is increased only when the
compressor is running (even non consecutively).
IdF2 Interval between defrosts, section 2: (1÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF2 (Maximum) duration of defrost, section 2: (0÷255 min) it sets the defrost durat ion.
dFd Display during defrost: rt = real temperature; it = temperature reading at the defrost start;
Set = set point; dEF = “dEF” label; dEG = “dEG” label;
dAd Defrost display time out: (0
÷255 min) Sets the maximum time between the end of defrost
and the restarting of the real room temperature display.
dSd Start defrost delay : ( 0÷99min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
FANS
FnC1 Fan operating mode, section 1:
C-n = running with the compressor1, OFF during the defrost;
C-y = running with the compressor1, ON during the defrost;
O-n = continuous mode, OFF during the defrost;
O-y = continuous mode, ON during the defrost;
Fnd1 Fan delay after defrost, section 1: (0÷255 min) The time interval between the defrost end
and evaporator fans start.
FSt1 Fan stop temperature, section 1: (-50÷110°C; -58÷230°F) setting of temperature, detected
by evaporator probe, above which the fan is always OFF.
FAP1 Probe selection for fans management, section 1: nP = no probe: fan follows the setting of
FnC1 parameter; P1 = thermostat 1 probe; P2 = thermostat 2 probe; P3 = evaporator probe;
ALARMS
ALc1 Temperature alarms configuration, section 1: it determines if alarms are relative to set
point 1 or referred to absolute values: rE relative to set point; Ab absolute temperature
ALL1 Minimum alarm, section 1:
with ALc1=rE: relative to set point1, (0÷50°C) this value is subtracted from the set point1.
The alarm signal is enabled when the probe values goes below the “SET1-ALL” value.
with ALc1=Ab absolute value, minimum alarm is enabled when the probe values goes below
the “ALL1” value.
ALU1 Maximum alarm, section 1:
with ALc1=rE: alarm relative to set point1, (0÷50°C) Maximum alarm is enabled when the
probe values exceeds the “SET1+ALU” value.
with ALc1=Ab: absolute alarm, (Set1÷Full Sc.) Maximum alarm is enabled when the probe
values exceeds the “ALU” value.
ALd1 Temperature alarm delay, section 1: (0÷255 min) t ime interval between the detection of an
alarm condition and the corresponding alarm signalling.
dAo1 Delay of temperature alarm at start-up, section 1: (0min÷23h 50min) time interval between
the detection of the temperature alarm condition in section after the instrument power on and
the alarm signalling.
ALc2 Temperature alarms configuration, section 2: it determines if alarms are relative to set
point 2 or referred to absolute values: rE relative to set point; Ab absolute temperature
ALL2 Minimum alarm, section 2:
with ALc2=rE: relative to set point1, (0÷50°C) this value is subtracted from the set point2.
The alarm signal is enabled when the probe values goes below the “SET2-ALL” value.
with ALc2=Ab absolute value, minimum alarm is enabled when the probe values goes below
the “ALL2” value.
ALU2 Maximum alarm, section 2:
with ALc2=rE: alarm relative to set point1, (0÷50°C) Maximum alarm is enabled when the
probe values exceeds the “SET2+ALU” value.
with ALc2=Ab: absolute alarm, (Set2÷Full Sc.) Maximum alarm is enabled when the probe
values exceeds the “ALU” value.
ALd2 Temperature alarm delay, section 2: (0÷255 min) t ime interval between the detection of an
alarm condition and the corresponding alarm signalling.
dAo2 Delay of temperature alarm at start-up, section 2: (0min÷23h 50min) time interval between
the detection of the temperature alarm condition in section after the instrument power on and
the alarm signalling.
AFH Temperature alarm and fan differential: (0,1÷25,5°C; 1÷45°F) Intervention differential for
temperature alarm set point and fan regulation set point, always positive.
EdA Alarm delay at the end of defrost: (0
÷255 min) Time interval between the detection of the
temperature alarm condition at the end of defrost and the alarm signalling.
dot Delay of temperature alarm after closing the door : (0
÷255 min) Time delay to signal the
temperature alarm condition after closing the door.
doA Open door alarm delay:(0÷255 min) delay between the detection of the open door condition
and its alarm signalling: the flashing message “dA” is displayed.
PROBE INPUTS
Pbc Kind of probe: Ptc = PTC; ntc = NTC
oFS1 Thermostat1 probe calibration: (-12.0
÷12.0°C/ -21÷21°F) allows to adjust possible offset of
the thermostat1 probe.
oFS2 Thermostat2 probe calibration: (-12.0
÷12.0°C/ -21÷21°F) allows to adjust possible offset of
the thermostat2 probe.
oFS3 Evaporator probe calibration: (-12.0
÷12.0°C/ -21÷21°F) allows to adjust possible offsets of
the evaporator probe.
P2P Thermostat2 probe presence : no= not present; yES= present.
P3P Evaporator probe presence: : no= not present: the defrost stops only by time; yES= present:
the defrost stops by temperature and time.
DIGITAL INPUTS
i1P Digital input 1 polarity (14-15):
CL : the digital input is activated by closing the contact;
OP : the digital input is activated by opening the contact.
i1F Digital input 1 operating mode(14-15): configure the digital input function:
MP1 = door switch 1; MP2 = door switch 2, MP: door switch (it’s used by both the sections);
EA1 = generic alarm section 1; EA2 = generic alarm section 2; EAL = generic alarm (it’s used
by both the sections); bA1 = serious alarm mode section 1; bA2 = serious alarm mode section
2; , bAL = serious alarm mode section (it’s used by bot h the sections); dF1 = Start defrost,
section 1; dF2 = Start defrost, section 2; dEF = Start defrost (it’s used by both the sections);
oF1 = remote on/ off, section1; oF2 = remote on/ off, section 2; oFF = = remote on/ off (it’s
used by both the sections); ES = Energy Saving
i2P Digital input 2 polarity(13-14):
CL : the digital input is activated by closing the contact;
OP : the digital input is activated by opening the contact.
i2F Digital input 2 operating mode(13-14): configure the digital input function:
MP1 = door switch 1; MP2 = door switch 2, MP: door switch (it’s used by both the sections);
EA1 = generic alarm section 1; EA2 = generic alarm section 2; EAL = generic alarm (it’s used
by both the sections); bA1 = serious alarm mode section 1; bA2 = serious alarm mode section
2; , bAL = serious alarm mode section (it’s used by bot h the sections); dF1 = Start defrost,
section 1; dF2 = Start defrost, section 2; dEF = Start defrost (it’s used by both the sections);
oF1 = remote on/ off, section1; oF2 = remote on/ off, section 2; oFF = = remote on/ off (it’s
used by both the sections); ES = Energy Saving
odc1 Compressor and fan status when open door, section 1
:
no = normal; Fan = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan OFF.
rrd1 Outputs restart after door open alarm, section 1: n = status of outputs according to odc1; Y=
outputs restart working.
did1 Time interval delay for digital input alarm, section 1:(0
÷255 min.) With i1F or i2F = EAL1 or
bAL1 (external alarms), “did” parameter defines the time delay between the detection and the
successive signalling of the alarm.
odc2 Compressor status when open door, section 2: no ,Fan = normal;
CPr, F_C = Compressor OFF.
rrd2 Outputs restart after door open alarm, section 2: n = status of outputs according to odc2;
Y= outputs restart working.
did2 Time interval delay for digital input alarm, section 2:(0
÷255 min.) With i1F or i2F = EAL1 or
bAL1 (external alarms), “did” parameter defines the time delay between the detection and the
successive signalling of the alarm.
OTHER
HES1 Temperature increase during the Energy Saving cycle, section 1: (-30÷30°C /
-54÷54°F) sets the increasing value of the set point1 during the Energy Saving cycle.
HES2 Temperature increase during the Energy Saving cycle, section 2: (-30÷30°C /
-54÷54°F) sets the increasing value of the set point2 during the Energy Saving cycle.
Adr1 RS485 serial address, section 1 (1÷247): Identifies section 1 address when connect ed
to a ModBUS compatible monitoring system.
Adr2 RS485 serial address, section 2 (1÷247): Identifies section 2 address when connect ed
to a ModBUS compatible monitoring system.
If Adr1 = Adr2
dP1 First probe display
dP2 Second probe display
dP3 Third probe display
OnF Stand-by function: n = Stand-by function not enabled; y = Stand-by function enabled (under
SET key control).
rEL Release software: (read only) Software version of the microprocessor.
Ptb Parameter table: (read only) it shows the original code of the dIXEL parameter map.
Pr2 Access to the protected parameter list (read only).
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8. DIGITAL INPUT
The instrument can support up to 2 free contact digital inputs. Bot h of them can be configured as
One is always configured as door switch, the second is programmable in seven different
configurations by the “I2F” parameter.
8.1 DOOR SWITCH INPUT (MP1, MP2, MP)
It signals the door status to the controller:
MP1: door open for section 1;
MP2: door open for section 2;
MP door open for both the sections.
When the door is open the status of compressor (and fans) depends on the “odc1” and
“odc2”parameters:
no = normal (no changes);
Fan = Fan OFF (if fan is present);
CPr = Compressor OFF;
F_C = Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter “doA”, the alarm output is
enabled and the display shows the message “dA”. The alarm stops as soon as the external digital
input is disabled again. During this time and then for the delay “dot” after closing the door, the high
and low temperature alarms are disabled.
8.2 CONFIGURABLE INPUT - GENERIC ALARM (EA1, EA2, EAL )
It signals to the controller:
EA1: generic alarm – section 1;
EA2: generic alarm – section 2;
EAL: generic alarm – it counts for both the sections.
As soon as the digital input is activated the unit will wait for “did1” time for section 1 and “did2” tim e
for section 2 delay before signalling the “EAL” alarm message. The outputs status don’t change. The
alarm stops just after the digital input is de-activated.
8.3 CONFIGURABLE INPUT - SERIOUS ALARM MODE (BA1, BA2, BAL)
It signals to the controller:
bA1: serious alarm – section 1;
bA2: serious alarm – section 2;
bAL: serious alarm – it counts for both the sections.
As soon as the digital input is activated the unit will wait for “did1” time for section 1 and “did2” tim e
for section 2 delay before signalling the “bAL” alarm message. The relay outputs are switched OFF.
The alarm will stop as soon as the digital input is de-activated.
8.4 CONFIGURABLE INPUT - START DEFROST (DF1, DF2, DEF)
It executes a defrost if there are the right conditions, respectively for:
dF1: section 1;
dF2: section 2;
dEF: both the sections.
After the defrost is finished, the normal regulation will restart only if the digital input is disabled
otherwise the instrument will wait until the “Mdf1” and “MdF2” safety time is expired.
8.5 CONFIGURABLE INPUT - REMOTE ON/OFF (OF 1, OF2, ONF)
This function allows to switch ON and OFF a sections of the instrument or the whole inst rument
according to the following setting: .
oF1: section 1;
oF2: section 2;
onF: it counts for both the sections.
When the digital input is de-activated, the corresponding section restarts working.
8.6 CONFIGURABLE INPUT - ENERGY SAVING (ES)
The Energy Saving function allows to change the set point value as the result of the SET1+HES1 for
section and SET2 + HES2 fro section 2. This function is enabled until the digital input is activated.
8.7 DIGITAL INPUTS POLARITY
The digital inputs polarity depends on “I1P” and “I2P” parameters.
CL : the digital input is activated by closing the contact.
OP : the digital input is activated by opening the contact
9. INSTALLATION AND MOUNTING
Instruments shall be mounted on panel, in a 29x71 mm hole,
and fixed using the special brackets supplied.
To obtain an IP65 protection grade use the front panel
rubber gasket (mod. RG-C) as shown in figure.
The temperature range allowed
for correct operation is 0÷60 °C.
Avoid places subject to strong
vibrations, corrosive gases,
excessive dirt or humidity. The
same recommendations apply to
probes. Let air circulate by the
cooling holes.
10. ELECTRICAL CONNECTIONS
The instrument are provided with screw terminal block to connect cables with a cross section up to
2,5 mm
2
. Heat-resistant cables have to be used. Before connecting cables make sure the power
supply complies with the instrument’s requirements. Separate the probe cables from the power
supply cables, from the outputs and the power connections. Do not exceed the maximum current
allowed on each relay, in case of heavier loads use a suitable external relay.
10.1 PROBE CONNECTION
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place probe away from air streams to correctly measure the
average room temperature.
11. SERIAL LINE
The serial output allows the unit to connect to a network line ModBUS-RTU compatible as the
dIXEL monitoring system such as XJ500 or X-XWEB.
12. USE OF THE PROGRAMMING “HOT KEY “
The unit can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the
“Hot Key” and vice-versa.
12.1 DOWNLOAD (FROM THE “HOT KEY” TO THE INSTRUMENT)
Turn OFF the instrument, insert the “Hot Key” and then turn the instrument ON.
Automatically the parameter list of the “Hot Key” is downloaded into the memory, the “doL”
message is blinking. After 10 seconds the instrument will restart working with the new parameters.
Turn OFF the instrument remove the “Hot Key”, plug in the TTL serial cable, then turn it ON again.
At the end of the data transfer phase the instrument displays the following messages:
“end “ for right programming. The instrument starts regularly with the new programming.
“err” 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.
12.2 UPLOAD (FROM THE INSTRUMENT TO THE “HOT KEY”)
When the unit is ON, insert the “Hot key” and push è key; the "uPL" message appears.
Push “SET” key to start the UPLOAD; the “uPL” message is blinking.
Turn OFF the instrument remove the “Hot Key”, plug in the TTL serial cable, then turn it ON again.
At the end of the data transfer phase the instrument displays the following messages:
“end “ for right programming.
“err” for failed programming. In this case push “SET” key if you want to restart the programming
again or remove the not programmed “Hot key”.
13. ALARM SIGNALS
Message Cause Outputs
“P1” Thermostat1 probe failure Alarm output ON; Compressor1 output according to
parameters “COn1” and “COF1”
“P2” Thermostat2 probe failure Alarm output ON; Compressor2 output according to
parameters “COn2” and “COF2”
“P3” Evaporator probe failure Alarm output ON; Other outputs unchanged
“HA” High temperature alarm Outputs unchanged
“LA” Low temperature alarm Outputs unchanged
“EE” Some memory problems Alarm output ON; Other outputs OFF
“dA” Door switch alarm Outputs unchanged
“EAL” External alarm Outputs unchanged
“bAL” Serious external alarm Regulation outputs deactivated
“POF” Keyboard locked Outputs unchanged
“POn” Keyboard unlocked Outputs unchanged
The alarm message is displayed until the alarm condition is recovery.
All the alarm messages are showed alternating with the room temperature except for the “P1” which
is flashing. To reset the “EE” alarm and restart the normal functioning press any key, the “rSt”
message is displayed for about 3s.
13.1 SILENCING BUZZER
Once the alarm signal is detected the buzzer can be silenced by pressing any key.
13.2 “EE” ALARM
The dIXEL instruments are provided with an internal check for the data integrity. Alarm “EE”
flashes when a failure in the memory data occurs. In such cases the alarm output is enabled.
13.3 ALARM RECOVERY
Probe alarms : “P1” (probe1 faulty), “P2” and “P3”; they automatically stop 10s after the probe
restarts normal operation. Check connections before replacing the probe. Door switch alarm “dA”
stop as soon as the door is closed. External alarms “EAL”, “bAL” stop as soon as the external
digital input is disabled.
The alarm message is displayed until the alarm condition is recovery.
All the alarm messages are showed alternating with the room temperature except for the “P1” which
is flashing.
14. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: frontal 32x74 mm; depth 60mm;
Mounting: panel mounting in a 71x29mm panel cut-out
Protection: IP20.
Page 5
dIXEL
Installing and Operating Instructions
1592018110
1592018110 XR460C GB r1.0 04.07.2005 XR460C 5/5
Frontal protection: IP65 with frontal gasket RG-C (optional).
Connections: Screw terminal block ≤ 2,5 mm
2
heat-resistant wiring.
Power supply: 12Vac/dc (opt.24Vac/dc), ±10%
Power absorption: 5VA max.
Inputs: 3 NTC or PTC probes
Relay outputs
compressor1: SPST relay 8(3) A, 250Vac or
compressor 2: relay SPDT 8(3) A, 250Vac
defrost: relay SPDT 8(3) A, 250Vac
fans: relay SPST 8(3) A, 250Vac
Other output: Alarm buzzer
Kind of action: 1B.; Pollution grade: normal; Software class: A.
Data storing: on the non-volatile memory (EEPROM).
Operating temperature: 0÷60 °C.
Storage temperature: -25÷60 °C.
Relative humidity: 20÷85% (no condensing)
Measuring and regulation range: -40÷110°C (-58÷230°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable).
Accuracy (ambient temp. 25°C): range -40÷50°C (-40÷122°F): ±0,5 °C ±1 digit
15. WIRING CONNECTIONS
N.C.Line
8(3)A250V~
8(3)A
8( 3)A
Max
16A
Comp1
Def Fan
Room1
1
2
3
4
5
Config.2
Config.1
N.C.
8(3)A
7
89
Line
Comp2
Hot K e y
13 14 15 16 17 18 19 20 212223
Supply
12V=
Def.
Room2
16. DEFAULT SETTING VALUES
Label Nome Range Default level
REGULATION
Set1 Set point 1 LS1÷US1 -5 Pr1
Set2 Set point 2 LS2÷US2 3 Pr1
Hy1 Differential 1 0,1÷25,5 °C / 1÷45°F 2.0 Pr1
Hy2 Differential 2 0,1÷25,5 °C / 1÷45°F 2.0 Pr1
REGULATION – SECTION 1
LS1 Minimum set point1 limit -50,0°C÷SET1 / -58°F÷SET1 -50.0 Pr2
US1 Maximum set point1 limit SET1 ÷ 150°C / SET1 ÷ 302°F 110 Pr2
odS1 Outputs activat ion delay of sect. 1 at start up 0÷255 min. 0 Pr2
Ac1 Anti-short cycle delay for compressor1 0÷30 min. 1 Pr1
con1 Compressor1 ON time with faulty probe1 0÷255 min. 15 Pr2
coF1 Compressor1 OFF time with faulty probe1 0÷255 min. 15 Pr2
cH1 Kind of action for section 1 cL / Ht cL Pr2
REGULATION – SECTION 2
LS2 Minimum set point2 limit -50,0°C÷SET2 / -58°F÷SET2 -50.0 Pr2
US2 Maximum set point2 limit SET2 ÷ 150°C / SET2 ÷ 302°F 110 Pr2
odS2 Outputs activat ion delay of sect. 2 at start up 0÷255 min. 0 Pr2
Ac2 Anti-short cycle delay for compressor2 0÷30 min. 1 Pr1
con2 Compressor2 ON time with faulty probe2 0÷255 min. 15 Pr2
coF2 Compressor2 OFF time with faulty probe2 0÷255 min. 15 Pr2
cH2 Kind of action for section 2 cL / Ht cL Pr2
DISPLAY
cF Temperature measurement unit °C / °F °C Pr2
rES Resolution (for °C in ÷ de dE Pr1
Lod1 Bottom display visualization P1 ÷ P4 P1 Pr2
Lod2 Upper display visualization P1 ÷ P4 P2 Pr2
DEFROST
dFS Relation between defrosts ind; StS; Sti, SE ind Pr2
tdF1 Kind of defrost section 1 rE, in rE Pr2
EdF1 Defrost mode, section 1 In, Sd,RTC in Pr2
SdF1 Set point for Smart Defrost section 1 -30 ÷ +30°C / -22÷+86°F 0 Pr2
dtE1 End defrost temperature section 1 -50,0÷110°C/ -58÷230°F 6.0 Pr2
idF1 Int erval between defrosts, section 1 1÷120ore 6 Pr1
MdF1 Maximum duration of defrost, section 1 0÷255 min. 20 Pr1
tPF1 Pre-defrost compressor on t ime 0÷30 min. 0 Pr2
Fdt1 Dripping time section 1. 1 0÷60 min. 0 Pr2
dPo1 Defrost at power on sect ion . 1 n ÷ y n Pr2
EdF2 Defrost mode, section 2: In, Sd, RTC in Pr2
idF2 Int erval between defrosts, section 2 1÷120ore 8 Pr1
MdF2 (Maximum) duration of defrost, section 2 0÷255 min. 20 Pr1
dFd Display during defrost rt, it, SEt, dEF, dEG it Pr2
dAd Defrost display time out 0÷255 min. 20 Pr2
dSd Defrost delay 0÷255 min. 0 Pr2
FANS
FnC1 Fans operating mode, section 1 C-n, C-y, O-n, O-y O-n Pr2
Fnd1 Fans delay after defrost, section 1 0÷255 min. 10 Pr2
FSt1 Fans stop temperature, section 1 -50,0÷110°C/ -58÷230°F 2.0 Pr2
FAP1 Probe for fans P1÷P3 P3 Pr2
Label Nome Range Default level
ALARM
ALc1 Temperature alarms configuration, section 1 rE / Ab Ab Pr2
ALu1 Maximum alarm, section 1 -50,0÷150°C/ -58÷302°F 110 Pr1
ALL1 Minimum alarm, section 1 -50,0÷150°C/ -58÷302°F -50.0 Pr1
ALd1 Temperature alarm delay, section 1 0÷255 min. 15 Pr2
dAo1 Delay of temp. alarm at st art-up, section 1 0 ÷ 23h 50 min. 1.3 Pr2
ALc2 Temp. alarms configuration, section 2 re ÷ Ab Ab Pr2
ALu2 Maximum alarm, section 2 -50,0÷150°C/ -58÷302°F 110 Pr1
ALL2 Minimum alarm, section 2 -50,0÷150°C/ -58÷302°F -50.0 Pr1
ALd2 Temperature alarm delay, section 2 0÷255 min. 15 Pr2
dAo2 Delay of temp. alarm at st art-up, section 2 0 ÷ 23h 50 min. 1.3 Pr2
AFH Temperature alarm and fan differential 0, 1÷25,5 °C / 1÷45°F 1.0 Pr2
EdA Alarm delay at the end of defrost 0÷255 min. 20 Pr2
dot Delay of temp. alarm aft er closing the door 0÷255 min. 20 Pr2
doA Open door alarm delay 0÷254 min., nu 15 Pr2
Pbc Kind of probe PTC/ntc ntc Pr2
ANALOGUE INPUTS
oFS1 Thermostat1 probe calibration -12,0÷12,0°C / -21÷21°F 0.0 Pr2
oFS2 Thermostat2 probe calibration -12,0÷12,0°C / -21÷21°F 0.0 Pr2
oFS3 Evaporator probe calibration -12,0÷12,0°C / -21÷21°F 0.0 Pr2
P2P Thermostat2 probe presence n / y Y Pr2
P3P Evaporator probe presence n ÷ y Y Pr2
DIGITAL INPUTS
i1P Digital input 1 polarity cL÷OP cL Pr2
i1F Digital input 1 operating mode
MP1; MP2, MP; EA1; EA2;
EAL; bA1; bA2; , bAL; dF1;
dF2; dEF; oF1; oF2; oFF; ES
MP1 Pr2
i2P Digital input 2 polarity cL÷OP cL Pr2
i2F Digital input 2 operating mode
MP1; MP2, MP; EA1; EA2;
EAL; bA1; bA2; , bAL; dF1;
dF2; dEF; oF1; oF2; oFF; ES
MP2 Pr2
odc1 Comp. and fan status when open door, sect 1 no, Fan, CPr, F_C
FAn Pr2
rrd1 Outputs restart after door open alarm, sect. 1 n, y Y Pr2
did1 Time interval delay for digital input alarm,
sect. 1
0÷255 min.
15 Pr2
odc2 Comp. status when open door, section 2: no, Fan, CPr, F_C no Pr2
rrd2 Outputs restart after door open alarm, sect. 2 n, y Y Pr2
did2 Time interval delay for digital input alarm,
sect. 2
0÷255 min.
5 Pr2
OTHER
HES1 Temp. increase during the Energy Saving
cycle, sect. 1
-30÷30°C / -54÷54°F 0 Pr2
HES2 Temp. increase during the Energy Saving
cycle, section 2
-30÷30°C / -54÷54°F 0 Pr2
Adr1 RS485 serial address, section 1 1÷247 1 Pr2
Adr2 RS485 serial address, section 2 1÷247 1 Pr2
dP1 Thermostat 1 probe value - - - - - - Pr1
dP2 Thermostat 2 probe value - - - - - - Pr1
dP3 Evaporator probe value - - - - - - Pr1
onF Stand-by function y, n - - - Pr2
rEL Release software --- - - - Pr2
Ptb Parameter table - - - - - - Pr2
Pr2 Access to the protected parameter list - - - Pr1
Dixell S.p.A.
Via dell’Industria, 27 - 32010 Z.I Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13 –
E-mail:dixell@dixell.com - http://www.dixell.com
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