XR60C - XR70D - XR70D - Emerson Climate Technologies

XR60C - XR70D - XR70D - Emerson Climate Technologies
3.3 CONTROL OF EVAPORATOR FANS
Digital controller with defrost and fan management
The fan control mode is selected by means of the FnC parameter:
FnC=C_n, fans will switch ON and OFF with the compressor and not run during defrost.
FnC=o_n, fans will run even if the compressor is off, and not run during defrost.
XR70CX
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
After defrost, there is a timed fan delay allowing for drip time, set by means of the Fnd parameter.
FnC=C_Y, fans will switch ON and OFF with the compressor and run during defrost.
FnC=o_Y, fans will run continuously also during defrost.
GENERAL WARNING ________________________________________________________ 1
GENERAL DESCRIPTION ____________________________________________________ 1
CONTROLLING LOADS ______________________________________________________ 1
FRONT PANEL COMMANDS __________________________________________________ 1
MAX & MIN TEMPERATURE MEMORIZATION ____________________________________ 1
MAIN FUNCTIONS __________________________________________________________ 2
PARAMETERS _____________________________________________________________ 2
DIGITAL INPUTS ____________________________________________________________ 3
TTL SERIAL LINE – FOR MONITORING SYSTEMS ________________________________ 3
X-REP OUTPUT – OPTIONAL _________________________________________________ 3
INSTALLATION AND MOUNTING ______________________________________________ 4
ELECTRICAL CONNECTIONS _________________________________________________ 4
USE THE HOT KEY __________________________________________________________ 4
ALARM SIGNALS ___________________________________________________________ 4
TECHNICAL DATA __________________________________________________________ 4
CONNECTIONS_____________________________________________________________ 4
DEFAULT SETTING VALUES __________________________________________________ 4
An additional parameter FSt provides the setting of temperature, detected by the evaporator probe,
above which the fans are always OFF. This is used to make sure circulation of air only if his
temperature is lower than set in FSt.
3.3.1
Forced activation of fans
This function managed by the FCt parameter is designed to avoid short cycles of fans, that could
happen when the controller is switched on or after a defrost, when the room air warms the
evaporator. How it works: if the temperature difference between evaporator probe and room probe
is higher than the FCt parameter value, fans will be switched on. With FCt=0 the function is disabled.
3.3.2
Cyclical activation of the fans with compressor off.
When FnC=C-n or C-Y (fans working in parallel with the compressor), by means of the Fon and FoF
parameters the fans can carry out on and off cycles even if the compressor is switched off. When the
compressor is stopped the fans go on working for the Fon time. With Fon=0 the fans remain always
off, also when the compressor is off.
4. FRONT PANEL COMMANDS
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.r.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.
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 on and off (when onF=oFF).
2. GENERAL DESCRIPTION
Model XR70CX, format 32x74mm, is microprocessor based controller, suitable for applications on
medium or low temperature ventilated refrigerating units. It has four relay outputs to control
compressor, fan, and defrost, which can be either electrical or reverse cycle (hot gas). The last one
can be used as light, for alarm signalling or as auxiliary output. It is also provided with up to 4 NTC or
PTC probe inputs, the first one for temperature control, the second one, to be located onto the
evaporator, to control the defrost termination temperature and to managed the fan. The digital input
can operate as third temperature probe. The fourth one, to connect to the HOT KEY terminals, is
used to signal the condenser temperature alarm or to display another temperature.
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 Dixell 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.
To switch on and off the light (when oA3=LiG).
KEY COMBINATIONS:
+
+
+
To enter in programming mode.
To return to the room temperature display.
4.1 USE OF LEDS
3. CONTROLLING LOADS
Each LED function is described in the following table.
LED
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.
To lock & unlock the keyboard.
Temper.
SET
Time
Compr.
ON
ON
ON
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
°C/°F
Two defrost modes are available through the tdF parameter: defrost through electrical heater
(tdF=EL) and hot gas defrost (tdF=in).
Other parameters are used to control the interval between defrost cycles (idF), its maximum length
(MdF) and two defrost modes: timed or controlled by the evaporator’s probe (P2P).
At the end of defrost dripping time is started, its length is set in the Fdt parameter. With Fdt=0 the
dripping time is disabled.
1592020070 XR70CX GB m&M r1.3 27.03.2015
MODE
ON
Flashing
ON
Flashing
ON
Flashing
ON
FUNCTION
Compressor enabled
Anti-short cycle delay enabled
Defrost enabled
Drip time in progress
Fans enabled
Fans delay after defrost in progress.
An alarm is occurring
Continuous cycle is running
Energy saving enabled
Light on
ON
Auxiliary relay on
ON
Measurement unit
Flashing Programming phase
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO: SEE THE MIN TEMPERATURE
1.
2.
3.
XR70CX
Press and release the DOWN key.
The “Lo” message will be displayed followed by the minimum temperature recorded.
By pressing the DOWN key again or by waiting 5 sec the normal display will be restored.
1/5
To switch the instrument on, push again the ON/OFF key.
5.2 HOW TO: SEE THE MAX TEMPERATURE
1.
2.
3.
WARNING: Loads connected to the normally closed contacts of the relays are always
supplied and under voltage, even if the instrument is in stand by mode.
Press and release the UP key.
The “Hi” message will be displayed followed by the maximum temperature recorded.
By pressing the UP key again or by waiting 5 sec the normal display will be restored.
7. PARAMETERS
5.3 HOW TO: RESET THE MAX AND MIN TEMPERATURE RECORDED
1.
2.
REGULATION
Keep the SET key pressed more than 3 sec, while the max or min temperature is displayed.
(“rSt” message will be displayed)
To confirm the operation the “rSt” message will start blinking and the normal temperature will
be displayed.
HY
LS
6. MAIN FUNCTIONS
US
6.1 HOW TO: SEE THE SET POINT
1.
2.
ot
Push and immediately release the SET key: the display will show the
Set point value.
Push and immediately release the SET key or wait for 5 sec to display
the probe value again.
P2P
oE
6.2 HOW TO CHANGE THE SET POINT
1.
2.
3.
4.
Differential: (0.1 to 25.5°C; 1 to 45°F) intervention differential for set point.
Compressor Cut IN is Set Point + differential (HY). Compressor Cut OUT is when the
temperature reaches the set point.
Minimum set point: (-100°C to SET; -148°F to SET) sets the minimum value for the
set point.
Maximum set point: (SET to 150°C; SET to 302°F) set the maximum value for set
point.
Thermostat probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust
possible offset of the thermostat probe.
Evaporator probe presence: (n; Y) n = not present, the defrost stops by time;
Y = present, the defrost stops by temperature.
Evaporator probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the evaporator probe.
Third probe presence (P3): (n; Y) n = not present, the terminals 18-20 operate as
digital input; Y = present, the terminals 18-20 operate as third probe.
Third probe calibration (P3): (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the third probe.
Fourth probe presence: (n; Y) n = Not present; Y = present.
Fourth probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the fourth probe.
Outputs activation delay at start up: (0 to 255min) this function is enabled at the
initial start up of the instrument and inhibits any output activation for the period of time
set in the parameter.
Anti-short cycle delay: (0 to 50min) minimum interval between the compressor stop
and the following restart.
Percentage of the second and first probe for regulation: (0 to 100; 100=P1, 0=P2)
it allows to set the regulation according to the percentage of the first and second probe,
as for the following formula (rtr(P1-P2)/100 + P2).
Compressor ON time during continuous cycle: (0.0 to 24h00min, res. 10min)
allows to set the length of the continuous cycle. Compressor stays on without
interruption during CCt time. This is useful, for instance, when the room is filled with
new products.
Set point for continuous cycle: (-55 to 150°C; -67 to 302°F) it sets the set point
used during the continuous cycle.
Compressor ON time with faulty probe: (0 to 255min) time during which the
compressor is active in case of faulty thermostat probe. With Con=0 compressor is
always OFF.
Compressor OFF time with faulty probe: (0 to 255min) time during which the
compressor is OFF in case of faulty thermostat probe. With CoF=0 compressor is
always active.
P3P
Push the SET key more than 2 sec to change the Set point value.
The value of the set point will be displayed and the “°C” or “°F” LED will start blinking.
To change the Set value push the UP or DOWN arrows within 10 sec.
To save the new set point value, push the SET key again or wait for 10 sec.
o3
P4P
o4
6.3 HOW TO START A MANUAL DEFROST
Push the DEF key for more than 2 sec and a manual defrost will start.
odS
6.4 HOW TO: CHANGE A PARAMETER VALUE
AC
To change a parameter value, operate as follows:
1. Enter the Programming mode by pressing the SET+DOWN buttons for 3s (the °C or °F LED will
start blinking).
2. Select the required parameter. Press the SET button to display its actual value.
3. Use UP or DOWN buttons to change its value.
4. Press SET button to store the new value and move to the following parameter.
rtr
To exit: Press SET + UP buttons or waiting for 15s without pressing any key.
CCS
NOTE: the set value is stored even when the procedure is exited by waiting for the time-out to expire.
Con
CCt
6.5 THE HIDDEN MENU
The hidden menu includes all the parameters of the instrument.
6.5.1
CoF
HOW TO: ENTER THE HIDDEN MENU
1. Enter the Programming mode by pressing the SET+DOWN buttons for 3 sec (the °C or °F LED
will start blinking).
2. Released the buttons and then push again the SET+DOWN buttons for more than 7s. The Pr2
label will be displayed immediately followed from the HY parameter.
Now it is possible to browse the hidden menu.
3. Select the required parameter.
4. Press the SET button to display its value.
5. Use UP or DOWN to change its value.
6. Press SET to store the new value and move to the following parameter.
DISPLAY
CF
rES
Lod
To exit: Press SET+DOWN or wait 15 sec without pressing a key.
rEd
NOTE1: if no parameter is present in Pr1 menu, after 3 sec the “noP” message will be displayed.
Keep the buttons pushed till the Pr2 message will be displayed.
NOTE2: the set value is stored even when the procedure is exited by waiting for the time-out to
expire
dL
Y
dtr
6.5.2 HOW TO: MOVE A PARAMETER FROM THE HIDDEN MENU TO THE
FIRST LEVEL AND VICEVERSA.
Each parameter present in the hidden menu (Pr2) can be moved into the user level (Pr1) by pressing
SET+DOWN buttons. If a parameter is part of the user level, when showed in the hidden menu the
decimal point will be lit.
DEFROST
6.6 HOW TO: LOCK THE KEYBOARD
tdF
dFP
1.
2.
dtE
3.
Keep both UP and DOWN buttons pressed for more than 3 sec.
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
If a button is pressed more than 3 sec the “PoF” message will be displayed
idF
6.7 HOW TO: UNLOCK THE KEYBOARD
Keep pressed together for more than 3 sec the UP and DOWN keys till the “Pon” message will be
displayed.
Md
F
6.8 THE CONTINUOUS CYCLE
dSd
When defrost is not in progress, it can be activated by holding the UP key pressed for about 3 sec.
The compressor operates to maintain the CCS set point for the time set through the CCt parameter.
The cycle can be terminated before the end of the set time using the same activation key UP for 3
sec.
dFd
dAd
6.9 THE ON/OFF FUNCTION
Fdt
With “onF = oFF”, pushing the ON/OFF key, the instrument is switched off. The “OFF”
message is displayed. In this configuration, the regulation is disabled.
1592020070 XR70CX GB m&M r1.3 27.03.2015
Temperature measurement unit: (°C; °F) °C = Celsius; °F = Fahrenheit.
WARNING: When the measurement unit is changed the SET point and the values of
the parameters HY, LS, US, ot, ALU and ALL have to be checked and modified (if
necessary).
Resolution (for °C): (in=1°C; dE=0.1°C) allows decimal point display.
Instrument display: (P1; P2, P3, P4, SET, dtr) it selects which probe is displayed by
the instrument. P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe (only
for model with this option enabled); P4 = Fourth probe, SET = set point; dtr =
percentage of visualization.
X-REP display (optional): (P1; P2, P3, P4, SET, dtr) it selects which probe is
displayed by X- REP. P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe
(only for model with this option enabled); P4 = Fourth probe, SET = set point;
dtr = percentage of visualization.
Display delay: (0 to 20min00s; res. 10s) when the temperature increases, the display
is updated of 1°C or 1°F after this time.
Percentage of the second and first probe for visualization when Lod=dtr: (0 to 99;
100=P1, 0=P2) if Lod=dtr it allows to set the visualization according to the percentage
of the first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).
XR70CX
Defrost type: (EL; in) EL = electrical heater; in = hot gas.
Probe selection for defrost termination: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = evaporator probe; P3 =configurable probe; P4 = Probe on
Hot Key plug.
Defrost termination temperature: (-55 to 50°C; -67 to 122°F) (enabled only when
EdF=Pb) sets the temperature measured by the evaporator probe, which causes the
end of defrost.
Interval between defrost cycles: (0 to 120hours) determines the interval of time
between two defrost cycles.
(Maximum) length for defrost: (0 to 255min) when P2P=n, (not evaporator probe:
timed defrost) it sets the defrost duration. When P2P=Y (defrost end based on
temperature) it sets the maximum length for defrost.
Start defrost delay: (0 to 99min) this is useful when different defrost start times are
necessary to avoid overloading the plant.
Temperature displayed during defrost: (rt; it; SEt; dEF) rt = real temperature;
it = temperature at defrost start; SEt = set point; dEF = “dEF” label.
MAX display delay after defrost: (0 to 255min) sets the maximum time between the
end of defrost and the restarting of the real room temperature display.
Drip time: (0 to 120min) 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.
2/5
dPo
dAF
First defrost after start-up: (n; Y)

n = after the idF time,
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Y = immediately.
Defrost delay after continuous cycle: (0.0 to 24h00min, res. 10min) time interval
between the end of the fast freezing cycle and the following defrost related to it.
did
Fans operating mode: (C-n; o-n; C-Y; o-Y) C-n = runs with the compressor, OFF
during defrost; o-n = continuous mode, OFF during defrost; C-Y = runs with the
compressor, ON during defrost; o-Y = continuous mode, ON during defrost.
Fans delay after defrost: (0 to 255min) interval between end of defrost and evaporator
fans start.
Temperature differential to avoid fan short cycles: (0 to 59°C; 0 to 90°F) (N.B.: if
FCt=0 function disabled) if the difference of temperature between the evaporator and
the room probes is higher than FCt value, the fans will be switched on.
Fans stop temperature: (-55 to 50°C; -67 to 122°F) setting of temperature, detected
by evaporator probe, above which fans are always OFF.
Fan ON time: (0 to 15min) with Fnc=C_n or C_Y, (fan activated in parallel with
compressor) it sets the evaporator fan ON cycling time when the compressor is off.
With Fon=0 and FoF≠0 the fan are always off, with Fon=0 and FoF=0 the fan are
always off.
Fan OFF time: (0 to 15min) With FnC=C_n or C_Y, (fan activated in parallel with
compressor) it sets the evaporator fan off cycling time when the compressor is off.
With Fon=0 and FoF≠0 the fan are always off, with Fon=0 and FoF=0 the fan are
always off.
Probe selection for fan management: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = evaporator probe; P3 =configurable probe; P4 = Probe on
Hot Key plug.
odC
nPS
FANS
FnC
Fnd
FCt
FSt
Fon
FoF
FAP
rrd
HES
OTHER
Adr
PbC
onF
dP1
dP2
dP3
dP4
rSE
rEL
Ptb
ALARMS
ALC
ALU
ALL
AFH
ALd
dAo
AL2
Au2
AH2
Ad2
dA2
bLL
AC2
The free voltage digital input is programmable by the i1F parameter.
8.1 GENERIC ALARM (I1F = EAL)
As soon as the digital input is activated the unit will wait for did time delay before signalling the EAL
alarm message. The outputs statuses don’t change. The alarm stops just after the digital input is deactivated.
8.2 SERIOUS ALARM MODE (I1F = BAL)
When the digital input is activated, the unit will wait for did delay before signalling the CA alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is deactivated.
8.3 PRESSURE SWITCH (I1F = PAL)
If during the interval time set by did parameter, the pressure switch has reached the number of
activation of the nPS parameter; the CA pressure alarm message will be displayed. The compressor
and the regulation are stopped. When the digital input is ON the compressor is always OFF. If the
nPS activation in the did time is reached, switch off and on the instrument to restart normal
regulation.
8.4 DOOR SWITCH INPUT (I1F = DOR)
Probe selection for temperature alarm of condenser: (nP; P1; P2; P3; P4)
nP = no probe; P1 = thermostat probe; P2 = evaporator probe; P3 = configurable
probe; P4 = Probe on Hot Key plug.
Low temperature alarm of condenser: (-100 to 150°C; -148 to 302°F) when this
temperature is reached the LA2 alarm is signalled, possibly after the Ad2 delay.
High temperature alarm of condenser: (-100 to 150°C; -148 to 302°F) when this
temperature is reached the HA2 alarm is signalled, possibly after the Ad2 delay.
Differential for temperature condenser alarm recovery: 0.1 to 25.5°C; 1 to 45°F
Condenser temperature alarm delay: (0 to 255 min) time interval between the
detection of the condenser alarm condition and alarm signalling.
Condenser temperature alarm exclusion at start up: 0.0 to 24h00min, res. 10min.
Compressor off with low temperature alarm of condenser: (n; Y) n = compressor
keeps on working; Y = compressor is switched off till the alarm is present, in any case
regulation restarts after AC time at minimum.
Compressor off with high temperature alarm of condenser: (n; Y) n = compressor
keeps on working; Y = compressor is switched off till the alarm is present, in any case
regulation restarts after AC time at minimum.
It signals the door status and the corresponding relay output status through the odC parameter:
no = normal (any change); FAn = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan
OFF. Since the door is opened, after the delay time set through parameter doA, the door alarm is
enabled, the display shows the message dA and the regulation restarts is rtr=YES. The alarm
stops as soon as the external digital input is disabled again. With the door open, the high and low
temperature alarms are disabled.
8.5 START DEFROST (I1F = DEF)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “MdF” safety
time is expired.
8.6 SWITCH THE AUXILIARY RELAY (I1F = AUS)
With oA3 = AUS the digital input switched the status of the auxiliary relay
8.7 INVERSION OF THE KIND OF ACTION: HEATING-COOLING (I1F=HTR)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
FOURTH RELAY
tbA
oA3
AoP
8.8 ENERGY SAVING (I1F = ES)
Alarm relay silencing (with oA3 =ALr): (n; Y) n = silencing disabled: alarm relay
stays on till alarm condition lasts. Y = silencing enabled: alarm relay is switched OFF by
pressing a key during an alarm.
Second relay configuration (1-4): (dEF; FAn; ALr; LiG; AUS; onF; db; dEF2; HES)
dEF = defrost; FAn = do not select it; ALr = alarm; LiG = light; AUS = Auxiliary relay;
onF = always on with instrument on; db = neutral zone; dEF2 = do not select it; HES =
night blind.
Alarm relay polarity: (CL; oP) it set if the alarm relay is open or closed when an alarm
occurs. CL = terminals 1-4 closed during an alarm; oP = terminals 1-4 open during an
alarm.
The Energy Saving function allows to change the set point value as the result of the SET+ HES
(parameter) sum. This function is enabled until the digital input is activated.
8.9 ON OFF FUNCTION (I1F = ONF)
To switch the controller on and off.
8.10 DIGITAL INPUT POLARITY
The digital input polarity depends on the i1P parameter.
i1P = CL: the input is activated by closing the contact.
i1P = oP: the input is activated by opening the contact
DIGITAL INPUTS
i1P
i1F
Second digital input polarity: (oP; CL) oP = the digital input is activated by opening
the contact; CL = the digital input is activated by closing the contact.
Second digital input configuration: (EAL; bAL; PAL; dor; dEF; ES; AUS; Htr; FAn;
HdF; onF) EAL = external alarm: “EA” message is displayed; bAL = serious alarm “CA”
message is displayed; PAL = pressure switch alarm, “CA” message is displayed; dor =
door switch function; dEF = activation of a defrost cycle; ES = energy saving; AUS =
auxiliary relay activation with oA3=AUS; Htr = type of inverting action (cooling or
heating); FAn = fan; HdF = Holiday defrost (enable only with RTC); onF = to switch the
controller off.
1592020070 XR70CX GB m&M r1.3 27.03.2015
Serial address: (1 to 247) identifies the instrument address when connected to a
ModBUS compatible monitoring system.
Type of probe: (PtC; ntC) it allows to set the kind of probe used by the instrument:
PtC = PTC probe, ntC = NTC probe.
On/Off key enabling: (nU; oFF; ES) nU = disabled; oFF = enabled; ES = not set it.
Thermostat probe display.
Evaporator probe display.
Third probe display- optional.
Fourth probe display.
Real set point: it shows the set point used during the energy saving cycle or during the
continuous cycle.
Software release for internal use.
Parameter table code: readable only.
8. DIGITAL INPUTS
Temperature alarms configuration: (Ab; rE) Ab = absolute temperature, alarm
temperature is given by the ALL or ALU values. rE = temperature alarms are referred
to the set point. Temperature alarm is enabled when the temperature exceeds the
[SET+ALU] or [SET-ALL] values.
MAXIMUM temperature alarm:

If ALC=Ab: [ALL to 150.0°C or ALL to 302°F]

If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached the alarm is enabled, after the ALd delay time.
Minimum temperature alarm:

If ALC=Ab: [-100°C to ALU; -148 to ALU]

If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached the alarm is enabled, after the ALd delay time.
Differential for temperature alarm recovery: (0.1 to 25.5°C; 1 to 45°F) intervention
differential for recovery of temperature alarm.
Temperature alarm delay: (0 to 255 min) time interval between the detection of an
alarm condition and alarm signalling.
Exclusion of temperature alarm at start-up: (0.0 to 24h00min, res. 10min) time
interval between the detection of the temperature alarm condition after instrument
power on and alarm signalling.
CONDENSER TEMPERATURE ALARM
AP2
Digital input 1 alarm delay: (0 to 255 min) delay between the detection of the
external alarm condition and its signalling.
When i1F= PAL, it is the interval of time to calculate the number of pressure switch
activation.
Number of pressure switch activation: (0 to 15) Number of activation, during the did
or d2d interval, before signalling an alarm event (i1F, i2F=PAL).
If the nPS activation during did or d2d time is reached, switch off and on the instrument
to restart normal regulation.
Compressor status when open door: (no; FAn; CPr;F_C;) no = normal;
FAn = normal; CPr = compressor OFF, F_C = compressor OFF.
Outputs restart after door open alarm: (n; Y) n = outputs follow the odC parameter.
Y = outputs restart with a door open alarm.
Delta temperature during an Energy Saving cycle: (-30.0 to 30.0°C; -54 to 54°F) it
sets the increasing value of the set point [SET+HES] during the Energy Saving cycle.
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows to connect the instrument to a
monitoring system ModBUS-RTU compatible such as the XWEB500.
10. X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the dedicated
connector.
XR70CX
3/5
15. TECHNICAL DATA
To connect the X-REP to the
instrument the following connectors
must be used CAB-51F(1m), CAB52F(2m), CAB-55F(5m),
13.1 HOW TO: PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
Housing: self extinguishing ABS.
Case: frontal 32x74 mm; depth 60mm;
Mounting: panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: IP65
Connections: Screw terminal block  2.5 mm2 wiring
Power supply: according to the model
12VAC/DC, ±10%
110AC 10%, 50/60Hz
230VAC 10%, 50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14.2 mm high
Inputs: Up to 4 NTC or PTC probes
Digital inputs: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250VAC or SPST 16A 250VAC
Defrost: SPDT 8(3) A, 250VAC
Fan: SPST 5A, 250VAC
Aux: SPDT 8(3) A, 250VAC
Buzzer: optional
Data storing: on the non-volatile memory (EEPROM)
Internal clock back-up: 24 hours
Kind of action: 1B
Pollution degree: 2
Software class: A
Rated impulsive voltage: 2500V
Overvoltage Category: II
Operating temperature: 0 to 55°C
Storage temperature: -25 to 60°C
Relative humidity: 20 to 85% (no condensing)
Measuring and regulation range:
NTC probe: -40 to 110°C (-40 to 230°F)
PTC probe: -100 to 150°C (-148 to 302°F)
Resolution: 0.1°C or 1°C or 1°F (selectable)
Accuracy (ambient temp. 25°C): ±0.7°C ±1 digit
1.
2.
16. CONNECTIONS
11. INSTALLATION AND MOUNTING
Instrument XR70CX shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket supplied.
The temperature range allowed for correct operation is 0 to 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.
12. ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to
2.5mm2. 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.
12.1 PROBE CONNECTION
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place the thermostat probe away from air streams to correctly
measure the average room temperature. Place the defrost termination probe among the evaporator
fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
13. USE THE HOT KEY
Program one controller with the front keypad.
When the controller is ON, insert the “HOT-KEY” and push UP button; the “uPL” message
appears followed a by a flashing “End” label.
Push SET button and the “End” will stop flashing.
Turn OFF the instrument, remove the “HOT-KEY” and then turn it ON again.
3.
4.
The X-REP output excludes the TTL output.. It’s present in the following codes:
XR70CX- xx2xx, XR70CX –xx3xx;
16.1 XR70CX – 8A OR 16A COMP. RELAY - 230VAC OR 110VAC
NOTE: the “Err” message appears in case of a failed programming operation. In this case push
again button if you want to restart the upload again or remove the “HOT-KEY” to abort the operation.
13.2 HOW TO: PROGRAM AN INSTRUMENT USING A HOT KEY (DOWNLOAD)
1.
2.
NOTE: The compressor relay is
8(3)A or 16(6)A according to the
model.
24Vac supply: connect to the
terminals 5 and 6.
Turn OFF the instrument.
Insert a pre-programmed “HOT-KEY” into the 5-PIN receptacle and then turn the Controller
ON.
The parameter list of the “HOT-KEY” will be automatically downloaded into the Controller
memory. The “doL” message will blink followed a by a flashing “End” label.
After 10 seconds the instrument will restart working with the new parameters.
Remove the “HOT-KEY”.
3.
4.
5.
16.2 XR70CX – 4 X 16A - 12VAC/DC
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.
14. ALARM SIGNALS
Message
“P1”
“P2”
“P3”
“P4”
“HA”
“LA”
"HA2"
"LA2"
“dA”
“EA”
“CA”
“CA”
“rtc”
rtF
Cause
Room probe failure
Evaporator probe failure
Third probe failure
Fourth probe failure
Maximum temperature alarm
Minimum temperature alarm
Condenser high temperature
Condenser low temperature
Door open
External alarm
Serious external alarm (i2F=bAL)
Pressure switch alarm (i2F=PAL)
Real time clock alarm
Real time clock board failure
Outputs
Compressor output acc. to par. Con and CoF
Defrost end is timed
Outputs unchanged
Outputs unchanged
Outputs unchanged.
Outputs unchanged.
It depends on the AC2 parameter
It depends on the bLL parameter
Compressor and fans restarts
Output unchanged.
All outputs OFF.
All outputs OFF
Alarm output ON; Other outputs unchanged;
Defrosts according to par. idF Set real time clock
has to be set
Alarm output ON; Other outputs unchanged;
Defrosts according to par. idF Contact the service
17. DEFAULT SETTING VALUES
Label
SEt Set point
HY Differential
LS Minimum set point
US Maximum set point
ot Thermostat probe calibration
14.1 ALARM RECOVERY
P2P Evaporator probe presence
Probe alarms P1”, “P2”, “P3” and “P4” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check connections
before replacing the probe.
Temperature alarms “HA”, “LA” “HA2” and “LA2” automatically stop as soon as the temperature
returns to normal values.
Alarms “EA” and “CA” (with i2F=bAL) recover as soon as the digital input is disabled.
Alarm “CA” (with i2F=PAL) recovers only by switching off and on the instrument.
oE Evaporator probe calibration
P3P Third probe presence
o3 Third probe calibration
P4P Fourth probe presence
o4 Fourth probe calibration
14.2 OTHER MESSAGES
Pon
PoF
noP
Name
odS
AC
rtr
CCt
Keyboard unlocked.
Keyboard locked
In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
Outputs delay at start up
Anti-short cycle delay
P1-P2 percentage for regulation
Continuous cycle duration
CCS Set point for continuous cycle
1592020070 XR70CX GB m&M r1.3 27.03.2015
XR70CX
Range
LS; US
[0.1 to 25.5°C]
[1 to 45°F]
[-100°C to SET]
[-148°F to SET]
[SET to 150°C]
[SET to 302°F]
[-12.0 to 12.0°C]
[-21 to 21°F]
n; Y
[-12.0 to 12.0°C]
[-21 to 21°F]
n; Y
[-12.0 to 12.0°C]
[-21 to 21°F]
n; Y
[-12.0 to 12.0°C]
[-21 to 21°F]
0 to 255 min
0 to 50 min
0 to 100 (100=P1 , 0=P2)
0.0 to 24h00min, res. 10 min
[-100 to 150.0°C]
[-148 to 302°F]
Value Level
-5.0
--2.0
Pr1
-50.0
Pr2
110
Pr2
0.0
Pr1
Y
Pr1
0.0
Pr2
n
Pr2
0
Pr2
n
Pr2
0
Pr2
0
1
100
0.0
Pr2
Pr1
Pr2
Pr2
-5
Pr2
4/5
Label
Name
Con Compressor ON time with faulty probe
CoF Compressor OFF time with faulty probe
CF Temperature measurement unit
rES Resolution
Lod Probe displayed
rEd2 X-REP display
dLY Display temperature delay
dtr P1-P2 percentage for display
tdF Defrost type
dFP Probe selection for defrost termination
dtE
idF
MdF
dSd
dFd
dAd
Fdt
dPo
dAF
FnC
Fnd
FCt
FSt
Fon
FoF
FAP
ALC
ALU
ALL
AFH
ALd
dAo
AP2
AL2
AU2
AH2
Ad2
dA2
bLL
AC2
tbA
oA3
AoP
i1P
i1F
did
nPS
odC
rrd
HES
Adr
PbC
onF
dP1
dP2
dP3
dP4
rSE
rEL
Ptb
Range
Value Level
0 to 255 min
15
Pr2
0 to 255 min
30
Pr2
°C; °F
°C
Pr2
dE; in
dE
Pr1
P1; P2; P3; P4; SEt; dtr
P1
Pr2
P1; P2; P3; P4; SEt; dtr
P1
Pr2
0.0 to 20min00sec, res. 10 sec
0.0
Pr2
1 to 99
50
Pr2
EL; in
EL
Pr1
nP; P1; P2; P3; P4
P2
Pr2
[-55 to 50.0°C]
Defrost termination temperature
8
Pr1
[-67 to 122°F]
Interval between defrost cycles
0 to 120 hours
6
Pr1
(Maximum) length for defrost
0 to 255 min
30
Pr1
Start defrost delay
0 to 255 min
0
Pr2
Displaying during defrost
rt; it; SEt; dEF
it
Pr2
MAX display delay after defrost
0 to 255 min
30
Pr2
Draining time
0 to 255 min
0
Pr2
First defrost after start-up
n; Y
n
Pr2
Defrost delay after fast freezing
0.0 to 24h00min, res. 10 min
0.0
Pr2
Fan operating mode
C-n; o-n; C-Y; o-Y
o-n
Pr1
Fan delay after defrost
0 to 255 min
10
Pr1
Differential of temperature for forced
[0 to 50°C]
10
Pr2
activation of fans
[0 to 90°F]
[-55 to 50.0°C]
Fan stop temperature
2
Pr1
[-67 to 122°F]
Fan on time with compressor off
0 to 15 min
0
Pr2
Fan off time with compressor off
0 to 15 min
0
Pr2
Probe selection for fan management
nP; P1; P2; P3; P4
P2
Pr2
Temperat. alarms configuration
rE; Ab
Ab
Pr2
Rel: [0.0 to 50.0°C] [0 to 90°F]
MAXIMUM temperature alarm
110.0 Pr1
AbS: [ALL to 150°C] [ALL to 302°F]
Rel: [0.0 to 50.0°C] [0 to 90°F]
Minimum temperature alarm
AbS: [-100°C to ALU] [-148°F to
-50.0 Pr1
ALU]
[0.1 to 25.5°C]
Differential for temperat. alarm recovery
1.0
Pr2
[1 to 45°F]
Temperature alarm delay
0 to 255 min
15
Pr2
Delay of temperature alarm at start up
0.0 to 24h00min, res. 10 min
1.3
Pr2
Probe for temperat. alarm of condenser
nP; P1; P2; P3; P4
P4
Pr2
[-100 to 150°C]
Condenser for low temperat. alarm
-40
Pr2
[-148 to 302°F]
[-100 to 150°C]
Condenser for high temperat. alarm
110
Pr2
[-148 to 302°F]
Differ. for condenser temp. alar.
[0.1 to 25.5°C]
5
Pr2
recovery
[1 to 45°F]
Condenser temperature alarm delay
0 to 254 min, 255(nu)
15
Pr2
Delay of cond. temper. alarm at start up
0.0 to 24h00min, res. 10 min
1.3
Pr2
Compr. off for condenser low
n; Y
n
Pr2
temperature alarm
Compr. off for condenser high
n; Y
n
Pr2
temperature alarm
Alarm relay disabling
n; Y
Y
Pr2
ALr = alarm; dEF = do not select it;
LiG =Light; AUS =AUX; onF=always
Fourth relay configuration
on; FAn= do not select it; db = neutral ALr
Pr2
zone; CP2 = second compressor;
dF2 = do not select it
Alarm relay polarity (oA3=ALr)
oP; CL
CL
Pr2
Digital input polarity (18-19)
oP; CL
CL
Pr1
EAL; bAL; PAL; dor; dEF; ES; AUS;
Digital input configuration (18-19)
dor
Pr1
Htr; FAn; HdF; onF
Digital input alarm delay (18-20)
0 to 255 min
15
Pr1
Number of activation of pressure switch
0 to 15
15
Pr2
Compress and fan status when open
no; FAn; CPr; F-C
F-C
Pr2
door
Regulation restart with door open alarm
n; Y
Y
Pr2
[-30 to 30°C]
Differential for Energy Saving
0
Pr2
[-54 to 54°F]
Serial address
0 to 247
1
Pr2
Kind of probe
PtC; ntC
ntC
Pr2
on/off key enabling
nu; oFF; ES
nu
Pr2
Room probe display
probe value
Pr1
Evaporator probe display
probe value
Pr1
Third probe display
probe value
Pr1
Fourth probe display
probe value
Pr1
Real set
actual set
Pr2
Software release
read only
Pr2
Map code
read only
Pr2
1592020070 XR70CX GB m&M r1.3 27.03.2015
XR70CX
5/5
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