Cold Stream XR02CX Installation Manual

dIXEL

Operating Manual

DIGITAL CONTROLLER

XR01-02CX

1. CONTENTS

1. Contents____________________________________________________________________________ 1

2. General warnings _____________________________________________________________________1

3. General description ___________________________________________________________________ 1

4. Regulation __________________________________________________________________________ 1

5. Defrost (ONLY XR02CX) _______________________________________________________________ 1

6. Front panel commands ________________________________________________________________ 1

7. Parameters__________________________________________________________________________ 2

8. Digital inputs_________________________________________________________________________ 2

9. Installation and mounting _______________________________________________________________ 2

10. Electrical connections _________________________________________________________________ 2

11. How to use the hot key_________________________________________________________________ 2

12. Alarm signalling ______________________________________________________________________ 2

13. Technical data _______________________________________________________________________2

14. Connections _________________________________________________________________________ 3

15. Default setting values__________________________________________________________________ 3

2. GENERAL WARNINGS

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.

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.

3. GENERAL DESCRIPTION

Model XR01CX, format 32 x 74 x50 mm format is a single stage temperature controller suitable for applications in the field of refrigeration or heating. It provides a relay output to drive the compressor. It is also provided with 1 NTC probe input and one configurable digital input. The instrument is fully configurable through special parameters that can be easily programmed through the keyboard or the by HOTKEY.

Model XR02CX, format 32 x 74 x 50 mm, is a digital thermostat with off cycle defrost designed for refrigeration applications at normal temperature. It provides a relay output to drive the compressor. It is also provided with 1 NTC probe input and one configurable digital input. The instrument is fully configurable through special parameters that can be easily programmed through the keyboard or the by HOTKEY.

4. REGULATION

THE REGULATION OUTPUT

The regulation is performed according to the temperature measured by probe. The XR01CX is provided with the CH programmable parameter wich enables the user to set the regulation both for heating or cooling applications:

• CH=cL --> cooling applications;

• CH=Ht --> heating applications;

COOLING APPLICATIONS

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.

In case of fault in the thermostat probe the start and stop of the compressor are timed through parameters “Cy” and “Cn”.

HEATING APPLICATIONS ( ONLY FOR XR01CX)

The Hy value is automatically subtracted to the SET POINT. If the temperature decreases and reaches set point minus differential the output is started and then turned off when the temperature reaches set point value again.

5. DEFROST (ONLY XR02CX)

Defrost is performed through a simple stop of the compressor. Parameter “id” controls the interval between defrost cycles, while its length is controlled by parameter “Md”.

6. FRONT PANEL COMMANDS

To display target set point, in programming mode it selects a parameter or confirm an operation

To start a manual defrost (Only XR02CX)

In programming mode it browses the parameter codes or increases

KEYS COMBINATION

LED MODO SIGNIFICATO

To lock or unlock the keyboard

To enter in programming mode

To return to room temperature display

On Compressore enabled

Flashing Anti short cycle delay enabled (AC parameter)

On Defrost in progress

Flashing Dripping in progress

On Measurement unit

Flashing Programming mode

On Measurement unit

Flashing Programming mode

HOW TO SEE THE SET POINT

1. Push and immediately release the SET key, the set point will be showed;

2. Push and immediately release the SET key or wait about 5s to return to normal visualisation.

HOW TO CHANGE THE SETPOINT

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 n arrows within 10s.

4. To memorise the new set point value push the SET key again or wait 10s.

HOW TO START A MANUAL DEFROST (ONLY XR02CX)

Push the DEF

HOW TO CHANGE A PARAMETER VALUE

To change the parameter’s value operate as follows:

1. Enter the Programming mode by pressing the SET+ keys for 3s (“°C” or “°F” blinking).

key for more than 2 seconds and a manual defrost will start

2. Select the required parameter. Press the “SET” key to display its value

or to change its value.

3. Use

4. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET+

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.

HIDDEN MENU

The hidden menu includes all the parameters of the instrument.

HOW TO ENTER THE HIDDEN MENU

1. Enter the Programming mode by pressing the SET+ blinking).

2. Released the keys, then push again the SET+ displayed immediately followed from the Hy parameter.

keys for more than 7s. The L2 label will be

NOW YOU ARE IN THE HIDDEN MENU.

3. Select the required parameter.

4. Press the “SET” key to display its value

or to change its value.

5. Use

6. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET+ NOTE1: if none parameter is present in L1, after 3s the “nP” message is displayed. Keep the keys

pushed till the L2 message is displayed.

or wait 15s without pressing a key.

NOTE2: the set value is stored even when the procedure is exited by waiting the time-out to expire.

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+

. In HIDDEN MENU when a parameter is present in First Level the decimal

point is on.

TO LOCK THE KEYBOARD

1. Keep pressed for more than 3s the and keys.

2. The “OF” message will be displayed and the keyboard will be locked. If a key is pressed more

than 3s the “OF” message will be displayed.

TO UNLOCK THE KEYBOARD

Keep pressed together for more than 3s the and keys till the “on” message will be displayed.

the displayed value In programming mode it browses the parameter codes or

AUX

decreases the displayed value

keys for 3s (“°C” or “°F” LED starts

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dIXEL

Operating Manual

7. PARAMETERS

REGULATION

Hy Differential: (0,1°C ÷ 25°C / 1°F ÷ 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.

LS Minimum SET POINT: (-55°C÷SET/-67°F÷SET): Sets the minimum value for the set point.. US Maximum SET POINT: (SET÷99°C/ SET÷99°F). Set the maximum value for set point. ot First probe calibration: (-9.9÷9.9°C /-17÷17°F) allows to adjust possible offset of the first

probe.

od Outputs activation delay at start up: (0÷99min) 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.

Cy Compressor ON time with faulty probe: (0÷99 min) time during which the compressor is active

in case of faulty thermostat probe. With Cy=0 compressor is always OFF.

Cn Compressor OFF time with faulty probe: (0÷99 min) time during which the compressor is OFF

in case of faulty thermostat probe. With Cn=0 compressor is always active.

CH Kind of Action: cL= cooling action; Ht = heating action.

DISPLAY

CF 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, oE, o1, AU, AL have to be checked and modified if necessary).

rE Resolution (only for °C):(dE ÷ in) dE= decimal between -9.9 and 9.9°C; in= integer dy Display delay: (0÷15 min.) when the temperature increases, the display is updated of 1 °C/1°F

after this time.

DEFROST (Only XR02CX)

id Interval between defrost cycles: (0÷99 ore) Determines the time interval between the

beginning of two defrost cycles.

Md Maximum length for defrost: (0÷99 min. with 0 no defrost) when P2=n, (not evaporator probe:

timed defrost) it sets the defrost duration, when P2 = y (defrost end based on temperature) it sets the maximum length for defrost.

dF Display during defrost: (rt / it / St / dF) rt= real temperature; it= start defrost temperature; St=

SET-POINT; dF= label dF.

ALARMS

AU Maximum temperature alarm: (AL÷99°C/99°F) when this temperature is reached the alarm is

enabled, after the “Ad” delay time.

AL Minimum temperature alarm: (-55÷AU°C /-67÷AU°F) when this temperature is reached the

alarm is enabled, after the “Ad” delay time.

Ad Temperature alarm delay: (0÷99 min) time interval between the detection of an alarm condition

and alarm signalling.

dA Exclusion of temperature alarm at startup: (0÷99 min) time interval between the detection of

the temperature alarm condition after instrument power on and alarm signalling.

DIGITAL INPUT

iP Digital input polarity: (oP ÷ cL) oP= activated by closing the contact; cL= activated by opening

the contact;

iF Digital input configuration: (EA/bA/do/dF/Au/Hc) EA= external alarm: “EA” message is

displayed; bA= serious alarm “CA” message is displayed; do= door switch function; dF= defrost activation; Au =not used; Hc= inversion of the kind of action;

di Digital input delay: (0÷99 min) with iF=EA or bA delay between the detection of the external

alarm condition and its signalling. . With iF=do it represents the delay to activate the door open alarm.

dC Compressor and fan status when open door: (no/Fn/cP/Fc): no= normal; Fn = Fans OFF; cP

=Compressor OFF; Fc = Compressor and fans OFF;

rd Regulation with door open: (n÷y) n = no regulation if door is opened; Y= when di is elapsed

regulation restarts even if door open alarm is present;

OTHER

Pt Parameter code table rL Software release

8. DIGITAL INPUTS

The free voltage digital input is programmable in different configurations by the “iF” parameter.

DOOR SWITCH (iF=do)

It signals the door status and the corresponding relay output status through the “dC” parameter: no = normal (any change); Fn = Fan OFF; CP = Compressor OFF; FC = Compressor and fan OFF. Since the door is opened, after the delay time set through parameter “di”, the door alarm is enabled, the display shows the message “dA” and the regulation restarts if rd = y. 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.

EXTERNAL ALARM (iF=EA)

As soon as the digital input is activated the unit will wait for “di” time delay before signalling the “EA” alarm message. The outputs status don’t change. The alarm stops just after the digital input is deactivated.

SERIOUS ALARM (iF=bA)

When the digital input is activated, the unit will wait for “di” 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.

START DEFROST (iF=dF)

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 “dd” safety time is expired.

INVERSION OF THE KIND OF ACTION: HEATING - COOLING (iF=Hc)

This function allows to invert the regulation of the controller: from cooling to heating and viceversa.

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9. INSTALLATION AND MOUNTING

The instruments 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÷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 is provided with screw terminal block to connect cables with a cross section up to 2,5

. Before connecting cables make sure the power supply complies with the instrument’s

mm 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 PROBES

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.

11. HOW TO USE THE HOT KEY

11.1 HOW TO PROGRAM THE 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 key; the "uP" message appears

followed a by flashing “En”

3. Push “SET” key and the “En” will stop flashing.

4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.

NOTE: the “Er” message is displayed for failed programming. In this case push again o key if you want to restart the upload again or remove the “Hot key” to abort the operation.

11.2 HOW TO PROGRAM AN INSTRUMENT USING 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

“do” message is blinking followed a by flashing “En”.

4. After 10 seconds the instrument will restart working with the new parameters.

5. Remove the “Hot Key”..

NOTE: the “Er” message is displayed for failed programming. In this case push again o key if you want to restart the upload again or remove the “Hot key” to abort the operation.

12. ALARM SIGNALLING

Mess. Cause Outputs

"P1" Room probe failure Compressor output according to “Cy” e “Cn” "P2" Evaporator probe failure Defrost end is timed "HA" Maximum temperature alarm Outputs unchanged "LA" Minimum temperature alarm Outputs unchanged “EA” External alarm Outputs unchanged “CA” Serious external alarm All outputs OFF. “dA” Door Open Compressor and fans restarts

12.1 ALARM RECOVERY

Probe alarms P1” and “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” and “LA” automatically stop as soon as the temperature returns to normal values. Alarms “EA” and “CA” (with iF=bL) recover as soon as the digital input is disabled.

13. TECHNICAL DATA

Housing: self extinguishing ABS. Case: frontal 32x74 mm; depth 50mm; Mounting: panel mounting in a 71x29mm panel cut-out Protection: IP20; Frontal protection: IP65 Connections: Screw terminal block ≤ 2,5 mm Power supply: according to the model: 110Vac ±10%, 50/60Hz --- 230Vac ±10%, 50/60Hz Power absorption: 3.5 VA max Display: 2 digits, red LED, 14,2 mm high; Inputs: 1 NTC. Digital input: free voltage contact Relay outputs: compressor SPST 20(8)A 250Vac or 8(3) A 250Vac; Data storing: on the non-volatile memory (EEPROM). Kind of action: 1B; Pollution grade: 2; Software class: A.; Rated impulsive voltage: 2500V; Overvoltage Category: II Operating temperature: 0÷60 °C; Storage temperature: -25÷60 °C. Relative humidity: 20÷85% (no condensing) Measuring and regulation range: NTC -40÷110°C; Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,1 °C ±1 digit

wiring.

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