dixell COOL MATE XLR470 Bedieningshandleiding - Pagina 3

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GENERAL WARNINGS

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.

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Check the application limits before proceeding.

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1.2

SAFETY PRECAUTIONS

Check the supply voltage is correct before connecting the instrument.

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Do not expose to water or moisture: use the controller only within the operating limits avoiding sudden temperature changes with high

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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

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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.

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In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel with inductive loads could be useful.

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GENERAL DESCRIPTION

Model XLR470, 32x74 mm format, is a microprocessor based controller, able to control 2 temperatures in an independent way.

The first section is suitable for applications on medium or low temperature refrigerating units. It is provided with 3 relay outputs to control

compressor, defrost - which can be either electrical or hot gas - and the evaporator fans. It is also provided with 2 NTC or PTC probe inputs, one for

temperature control the other one to control the defrost end temperature of the evaporator.

The second section is suitable for applications on medium or low temperature refrigerating units. It is provided with 3 relay outputs to control

compressor, defrost - which can be either electrical or hot gas - and the evaporator fans. It is also provided with 2 NTC or PTC probe inputs, one for

temperature control the other one to control the defrost end temperature of the evaporator..

There are two digital inputs (free contact) completely configurable by parameters.

The standard TTL output allows the user to connect, by means of a TTL/RS485 external module, a ModBUS-RTU compatible monitoring system and

to programme the parameter list with the "Hot Key".

TEMPERATURE CONTROL

THE COMPRESSOR 1 (2)

In case of fault in the thermostat probe the start and stop of the compressor are timed through parameters "COn1(2)" and "COF1(2)".

DEFROST

SECTION 1

For the section 1 two defrost modes are available through the "tdF1" parameter:

tdF1= rE defrost with electrical heater

tdF1= in or hot gas.

The defrost interval is control by means of parameter "EdF1":

rtc (only for instruments with RTC): beginning of defrost cycles is set by the L1d1÷L1d6 parameters during the working days and S1d1÷S1d6

during the holidays

in the defrost is made every "IdF1" time

Sd the interval "IdF" is calculate through Smart Defrost algorithm (only when the compressor is ON)

At the end of defrost the drip time is controlled through the "Fdt1" parameter.

1592017050 XLR470 GB r1.0 24.05.07.doc

Operating manual

For each section, the regulation is performed according to the

temperature measured by its own thermostat probe with a positive

differential from the set point.

If the temperature increases and reaches set point1 (2) plus

differential1 (2) the compressor is started and then turned off when

the temperature reaches the set point value again.

XLR470

cod. 1592017

cod. 1592

017050

017

050

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