dixell XR20C Installations- und Betriebsanleitung - Seite 2

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Installing and Operating Instructions

•

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

•

Temperature measurement unit:

Celsius; °F= Fahrenheit. WARNING: When the

measurement unit is changed the SET point and the

values of the parameters Hy, LS, US and Ot have to be

checked and modified if necessary).

rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows the

decimal point displaying.

DEFROST

dtE Defrost termination temperature: (-50÷50 °C/

-58÷122°F) (Enabled only when P2P=y) sets the

temperature measured by the evaporator probe, which

causes the end of defrost.

IdF Interval between defrost cycles: (1÷120h) Determines

the time interval between the beginning of two defrost

cycles.

MdF Length for defrost: (0÷255min) It sets the defrost

duration.

•

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.

DIGITAL INPUT

i1P Digital input polarity: oP: the digital input is activated

by opening the contact; CL: the digital input is activated

by closing the contact.

did: (0÷255 min) door open signalling delay

•

odc Compressor status when open door:

no=Digital Input not used CPr= Compressor OFF.

OTHER

rEL Software release for internal use.

Ptb Parameter table index: readable only. For internal use.

7. DIGITAL INPUT

7.1 DIGITAL INPUTS 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

8. INSTALLATION AND MOUNTING

Instrument XR20C 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

moisture.

recommendations apply to probes. Let air circulate by the

cooling holes.

9. ELECTRICAL CONNECTIONS

The instruments are provided with screw terminal block to

connect cables with a cross section up to 2,5 mm

resistant cables have to be used. Before connecting cables

make sure the power supply complies with the instrument's

XR20CE2probecooling

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.

°C =

9.1 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 probe away from air streams to

correctly measure the average room temperature.

10. HOW TO USE THE HOT KEY

10.1 HOW TO PROGRAM A HOT KEY FROM THE

INSTRUMENT (UPLOAD)

Program one controller with the front keypad.

When the controller is ON, insert the "Hot key" and

push o key; the "uPL" message appears followed a

The word "End"

Push "SET" key and the End will stop being displayed.

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 o key if you want to

restart the upload again or remove the "Hot key" to abort the

operation.

10.2 HOW TO PROGRAM AN INSTRUMENT

USING A HOT KEY (DOWNLOAD)

Turn OFF the instrument.

Insert a programmed "Hot Key" into the 5 PIN

receptacle and then turn the Controller ON.

Automatically the parameter list of the "Hot Key" is

downloaded into the Controller memory, the "doL"

message is blinking followed a by "End".

After 10 seconds the instrument will restart working

with the new parameters.

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.

11. ALARM SIGNALS

Message

"EE"

Data or memory failure

"P1"

Room probe failure

"P2"

probe failure

"dA"

Door open

11.1 ALARM "EE"

The instrument is provided with an internal check verifying

memory integrity. Alarm "EE" flashes when a failure in the

internal memory is detected. In such case call the service.

11.2 ALARM RECOVERY

Probe alarm "P1 & P2" start some seconds after the fault in

the related probe; it automatically stops some seconds after

the probe restarts normal operation. Check connections

before replacing the probe.

Alarm dA will recover as soon as the digital input is disabled.

12. TECHNICAL DATA

Housing: self extinguishing ABS.

Case: XR20C frontal 32x74 mm; depth 60mm;

Mounting

XR20C panel mounting in a 71x29mm panel cut-out

Protection: IP20.

Frontal protection:

XR20C IP65 with frontal gasket RG-C (optional).

Connections: Screw terminal block ≤ 2,5 mm

resistant wiring.

The

same

Power supply: according to the model: 12Vac/dc, ±10%;

24Vac/dc, ±10%; 230Vac ±10%, 50/60Hz, 110Vac ±10%,

50/60Hz

Power absorption: 3VA max

Display: 3 digits, red LED, 14,2 mm high.

Inputs: 2 NTC probes. 1 Digital input

. Heat-

Relay outputs

Compressor:

SPST relay 16FLA/96LRA

Cause

Output

Output according to par.

"Con" and "COF"

Output unchanged

Regulation restarts

heat-

XR20C

Data storing: on the non-volatile memory (EEPROM).

Kind of action: 1B.

Pollution grade: normal

Software class: A.

Operating temperature: 0÷60 °C.

Storage temperature: -25÷60 °C.

Relative humidity: 20÷85% (no condensing)

Measuring and regulation range:

NTC probe: -40÷110°C (-58÷230°F)

Resolution: 0,1 °C or 1°C or 1 °F (selectable).

Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit

13. CONNECTIONS

13.1 XR20C: 16FLA COMPRESSOR

4 5

Supply

Comp

120V~

Line

120Vac supply: connect to the terminals 7 and 8.

OPTIONAL:

12Vac/dc supply: connect to the terminals 7 and 8.

24Vac/dc supply: connect to the terminals 7 and 8.

230Vac supply: connect to the terminals 7 and 8.

14. DEFAULT SETTING VALUES

Label

Name

Set Set point

Hy Differential

LS Minimum set point

US Maximum set point

Ot Thermostat probe calibration

P2P 2

probe presence

OE 2

probe calibration

OdS Outputs delay at start up

AC Anti-short cycle delay

COn Compressor ON time with faulty

probe

COF Compressor OFF time with faulty

probe

CF Temperature measurement unit

rES Resolution

dtE Defrost end temp

IdF Interval between defrost cycles

MdF (Maximum) length for defrost

dFd Displaying during defrost

dAd MAX display delay after defrost

i1P Digital input polarity

did Digital input alarm delay

odc Compressor status with open door:

rEL Software release

Ptb Map code

Hidden parameters

Dixell s.r.l. 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

9 10 11 12

Hot Key

Range

°C/°F

LS÷US

3/37

0,1÷25.5°C/

2/4

1÷ 45°F

-50°C÷SET/

-40/

-58°F÷SET

- 40

SET÷150°C/

110/

SET ÷ 230°F

230

-12÷ 12°C /

0/0

-21 ÷ 21°F

Y/N

-12÷12°C /-

120÷120°F

0÷255 min

0 ÷ 50 min

0 ÷ 255 min

°C ÷ °F

°C/°F

in ÷ dE

dE/-

-50 ÷ 50 °C

1 ÷ 120 hour

0 ÷ 255 min

rt, it, SEt,

DEF

0 ÷ 255 min

oP=opening;

CL=closing

0÷255min

No=No Digital

input used.

CPr; =

Compressor

off

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