dIXEL XW40L Wiring diagram

dIXEL
Installing and Operating Instructions 1598029050
1598029050 XW40L NFR GB r1.0 11.07.2008.doc XW40L 1/3
Digital controller for medium-low temperature
refrigeration applications
XW40L
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 XW40L, format 38x185mm, is microprocessor based controller, suitable for applications on
medium or low temperature ventilated refrigerating units. It has 3 relay outputs to control
compressor, defrost, which can be either electrical or reverse cycle (hot gas) and light . It is also
provided with 2 NTC probe inputs, the first one for temperature control, the second one, to be located
onto the evaporator, to control the defrost termination 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 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
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 FSt parameter. With FSt =0 the
dripping time is disabled.
4. FRONT PANEL COMMANDS
4.1 STEEL FINISHING
: 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.
To switch the light.
KEY COMBINATIONS:
+ To lock & unlock the keyboard.
+To enter in programming mode.
+To return to the room temperature display.
4.2 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
Flashing Drip time in progress
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enabled
ON Light 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 nkey.
2. The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the nkey again or by waiting 5s the normal display will be restored.
5.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the okey.
2. The “Hi” message will be displayed followed by the maximum temperature recorded.
3. By pressing the okey 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 HOW TO SEE THE SET POINT
1. Push and immediately release the SET key: the display will show the
Set point value;
2. Push and immediately release the SET key or wait for 5 seconds to
display the probe value again.
6.2 HOW TO CHANGE THE SET POINT
1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the “°C” or “°F” LED starts blinking;
3. To change the Set value push the o or narrows within 10s.
4. To memorise the new set point value push the SET key again or wait 10s.
6.3 HOW TO START A MANUAL DEFROST
Push the DEF key for more than 2 seconds and a manual defrost will start.
6.4 HOW TO CHANGE A PARAMETER VALUE
To change the parameter’s value operate as follows:
1. Enter the Programming mode by pressing the Set + nkeys 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.
6.5 THE HIDDEN MENU
The hidden menu Includes all the parameters of the instrument.
6.5.1 HOW TO ENTER THE HIDDEN MENU
1. Enter the Programming mode by pressing the Set + nkeys for 3s (the “°C” or “°F” LED starts
blinking).
2. Released the keys, then push again the Set+nkeys 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 nto 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.

dIXEL
Installing and Operating Instructions 1598029050
1598029050 XW40L NFR GB r1.0 11.07.2008.doc XW40L 2/3
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 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.
6.6 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.
6.7 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the o and nkeys, till the “Pon” message will be
displayed.
6.8 THE CONTINUOUS CYCLE
When defrost is not in progress, it can be activated by holding the “o” key pressed for about 3
seconds. 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
“o” for 3 seconds.
6.9 THE ON/OFF FUNCTION
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.
To switch the instrument on, push again the ON/OFF key.
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.
7. PARAMETERS
REGULATION
Hy Differential: (0,1 ÷ 25,5°C / 1÷255 °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.
LS Minimum set point: (- 50°C÷SET/-58°F÷SET): Sets the minimum value for the set point.
US Maximum set point: (SET÷110°C/ SET÷230°F). Set the maximum value for set point.
Ot Thermostat probe calibration: (-12.0÷12.0°C; -120÷120°F) allows to adjust possible offset of
the thermostat probe.
P2P Evaporator probe presence: n= not present: the defrost stops by time; y= present: the defrost
stops by temperature.
OE Evaporator probe calibration: (-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of
the evaporator probe.
OdS Outputs activation delay at start up: (0÷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.
AC Anti-short cycle delay: (0÷50 min) minimum interval between the compressor stop and the
following restart.
CCt Compressor ON time during continuous cycle: (0.0÷24.0h; res. 10min) Allows to set the
length of the continuous cycle: compressor stays on without interruption for the CCt time. Can be
used, for instance, when the room is filled with new products.
CCS Set point for continuous cycle: (-50÷150°C) it sets the set point used during the continuous
cycle.
COn Compressor ON time with faulty probe: (0÷255 min) time during which the compressor is
active in case of faulty thermostat probe. With COn=0 compressor is always OFF.
COF Compressor OFF time with faulty probe: (0÷255 min) time during which the compressor is
OFF in case of faulty thermostat probe. With COF=0 compressor is always active.
DISPLAY
CF Temperature measurement unit: °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).
rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display.
DEFROST
tdF Defrost type: EL = electrical heater; in = hot gas
dtE Defrost termination temperature: (-50÷50 °C/
-58÷122°F) (Enabled only when EdF=Pb) sets the temperature measured by the evaporator
probe, which causes the end of defrost.
IdF Interval between defrost cycles: (0÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF (Maximum) length for defrost: (0÷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.
dFd Temperature displayed during defrost: (rt = real temperature; it = temperature at defrost
start; SEt = set point; dEF = “dEF” label)
dAd MAX display delay after defrost: (0÷255min). Sets the maximum time between the end of
defrost and the restarting of the real room temperature display.
Fdt Drip time: (0÷120 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.
dPo First defrost after start-up: (y = immediately; n = after the IdF time)
dAF Defrost delay after continuous cycle: (0÷23.5h) time interval between the end of the fast
freezing cycle and the following defrost related to it.
ALARMS
ALC 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.
ALU MAXIMUM temperature alarm: (SET÷110°C; SET÷230°F) when this temperature is reached
the alarm is enabled, after the “ALd” delay time.
ALL Minimum temperature alarm: (-50.0 ÷ SET °C; -58÷230°F when this temperature is reached
the alarm is enabled, after the “ALd” delay time.
ALd Temperature alarm delay: (0÷255 min) time interval between the detection of an alarm
condition and alarm signalling.
dAO Exclusion of temperature alarm at start-up: (from 0.0 min to 23.5h) time interval between the
detection of the temperature alarm condition after instrument power on and alarm signalling.
OTHER
Adr Serial address (1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
rEL Software release for internal use.
Ptb Parameter table code: readable only.
8. TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter, XJ485-CX, to connect the instrument to a monitoring system ModBUS-RTU
compatible such as the X-WEB500/3000/300.
9. X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the dedicated
connector.
To connect the X-REP to the
instrument the following
connectors must be used
CAB/REP1(1m), CAB/REP2
(2m), CAB/REP5 (5m),
10. INSTALLATION AND MOUNTING
The controller XW40L, shall be mounted on vertical panel, in a 150x31 mm hole, and fixed using two
screws ∅3 x 2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod. RG-
L). 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 the air circulate by the cooling holes.
10.1 CUT OUT
10.2 STEEL FINISHING MOUNTING
1
1
2
23
3
4
4
RG-LX gascke
(optional)
11. ELECTRICAL CONNECTIONS
The instruments are provided with screw terminal block to connect cables with a cross section up to
2,5 mm2 for the digital and analogue inputs. Relays and power supply have a Faston connection
(6,3mm). 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.
N.B. Maximum current allowed for all the loads is 20A.
11.1 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.

dIXEL
Installing and Operating Instructions 1598029050
1598029050 XW40L NFR GB r1.0 11.07.2008.doc XW40L 3/3
12. HOW TO USE THE HOT KEY
12.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push okey; the "uPL" message
appears followed a by flashing “End”
3. Push “SET” key and the End will stop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.
NOTE: the “Err” message is displayed for failed programming. In this case push again okey if you
want to restart the upload again or remove the “Hot key” to abort the operation.
12.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is downloaded into the Controller memory,
the “doL” message is blinking followed a by flashing “End”.
4. After 10 seconds the instrument will restart working with the new parameters.
5. Remove the “Hot Key”..
NOTE the message “Err” is displayed for failed programming. In this case turn the unit off and then
on if you want to restart the download again or remove the “Hot key” to abort the operation.
13. ALARM SIGNALS
Message Cause Outputs
“P1” Room probe failure Compressor output acc. to par. “Con” and “COF”
“P2” Evaporator probe failure Defrost end is timed
“HA” Maximum temperature alarm Outputs unchanged.
“LA” Minimum temperature alarm Outputs unchanged.
13.1 ALARM RECOVERY
Probe alarms P1”, “P2”, 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” automatically stop as soon as the temperature returns to
normal values.
13.2 OTHER MESSAGES
Pon Keyboard unlocked.
PoF Keyboard locked
noP In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
14. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: facia 38x185 mm; depth 76mm
Mounting : panel mounting in a 150x31 mm panel cut-out with two screws. ∅3 x 2mm.
Distance between the holes 165mm
Protection: IP20; Frontal protection: IP65 with frontal gasket mod RG-L. (optional)
Connections: Screw terminal block ≤2,5 mm2heat-resistant wiring and 6,3mm Faston
Power supply: 230Vac or. 110Vac or 24Vac ±10%
Power absorption: 5VA max.
Display: 3 digits, 14,2 mm high; Inputs: 2 NTC probes.
Relay outputs: Total current on loads MAX. 20A
compressor: relay SPST 16(3)A, 250Vac
light: relay SPST 8 or 16(3) A, 250Vac
defrost: relay SPST 16(3) A, 250Vac
Other output : buzzer (optional)
Serial output : TTL standard; Communication protocol: Modbus - RTU
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: 2;Software class: A.;
Rated impulsive voltage: 2500V; Over voltage Category: II
Operating temperature: 0÷60 °C; Storage temperature: -30÷85 °C.
Relative humidity: 20÷85% (no condensing)
Measuring and regulation range: NTC probe: -40÷110°C (-40÷230°F);
Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit
15. CONNECTIONS
Supply: 120Vac or 24Vac: connect to terminals 7-8
16. DEFAULT SETTING VALUES
Label Name Range
Value Level
Set Set point LS÷US 0 ---
Hy Differential 0,1÷25.5°C/ 1÷255°F 4 Pr1
LS Minimum set point -50°C÷SET/-58°F÷SET -2 Pr2
US Maximum set point SET÷110°C/ SET ÷230°F 16 Pr2
Ot Thermostat probe calibration -12÷12°C /-120÷120°F 0 Pr2
P2P Evaporator probe presence n=not present; Y=pres. Y Pr2
OE Evaporator probe calibration -12÷12°C /-120÷120°F 0 Pr2
OdS Outputs delay at start up 0÷255 min 1 Pr2
AC Anti-short cycle delay 0 ÷50 min 1 Pr2
CCt Continuous cycle duration 0.0÷24.0h 0.0 Pr2
CCS Set point for continuous cycle (-55.0÷150,0°C) (-67÷302°F) 0 Pr2
COn Compressor ON time with faulty probe 0 ÷255 min 15 Pr2
COF Compressor OFF time with faulty probe 0 ÷255 min 20 Pr2
CF Temperature measurement unit °C ÷°F °C Pr1
rES Resolution in=integer; dE= dec.point in Pr2
tdF Defrost type EL=el. heater; in= hot gas EL Pr2
dtE Defrost termination temperature -50 ÷50 °C 8.0 Pr1
IdF Interval between defrost cycles 1 ÷120 ore 4 Pr1
MdF (Maximum) length for defrost 0 ÷255 min 60 Pr1
dFd Displaying during defrost rt, it, SEt, DEF it Pr2
dAd MAX display delay after defrost 0 ÷ 255 min 30 Pr2
Fdt Draining time 0÷120 min 0 Pr2
dPo First defrost after start-up n=after IdF; y=immed. n Pr2
dAF Defrost delay after fast freezing 0 ÷ 23h e 50’ 0.0 Pr2
ALc Temperat. alarms configuration rE= related to set;
Ab = absolute rE Pr2
ALU MAXIMUM temperature alarm Set÷110.0°C; Set÷230°F 10 Pr2
ALL Minimum temperature alarm -50.0°C÷Set/ -58°F÷Set 10 Pr2
ALd Temperature alarm delay 0 ÷255 min 10 Pr2
dAO Delay of temperature alarm at start up 0 ÷23h e 50’ 2.0 Pr2
Adr Serial address 1÷247 1 Pr2
rEL Software release -- 1.8 Pr2
Ptb Map code -- Pr2
Dixell S.p.A. Z.I. Via dell’Industria, 27
32010 Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13
E-mail: [email protected] - http://www.dixell.com