dIXEL XW40L Instrukcja instalacji i obsługi

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dIXEL

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.

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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.

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Fit the probe where it is not accessible by the End User. The instrument must not be opened.

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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).

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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.

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.

1598029050 XW40L NFR GB r1.0 11.07.2008.doc

Installing and Operating Instructions

Temper.

SET

Compr.

KEY COMBINATIONS:

4.2 USE OF LEDS

Each LED function is described in the following table.

LED

MODE

Compressor enabled

Flashing Anti-short cycle delay enabled

Defrost enabled

Flashing Drip time in progress

An alarm is occurring

Continuous cycle is running

Energy saving enabled

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

Press and release the n key.

The "Lo" message will be displayed followed by the minimum temperature recorded.

By pressing the n key again or by waiting 5s the normal display will be restored.

5.2 HOW TO SEE THE MAX TEMPERATURE

Press and release the o key.

The "Hi" message will be displayed followed by the maximum temperature recorded.

By pressing the o key again or by waiting 5s the normal display will be restored.

5.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED

Hold press the SET key for more than 3s, while the max. or min temperature is displayed. (rSt

message will be displayed)

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

Time

display the probe value again.

6.2 HOW TO CHANGE THE SET POINT

Push the SET key for more than 2 seconds to change the Set point value;

The value of the set point will be displayed and the "°C" or "°F" LED starts blinking;

To change the Set value push the o or n arrows within 10s.

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

6.3 HOW TO START A MANUAL DEFROST

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 + n keys 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 + n keys for 3s (the "°C" or "°F" LED starts

blinking).

2. Released the keys, then push again the Set+n keys 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 n to 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.

XW40L

To lock & unlock the keyboard.

To enter in programming mode.

To return to the room temperature display.

FUNCTION

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 seconds to

Push the DEF key for more than 2 seconds and a manual defrost will start.

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