Technical data

Instructions Manual cod. 1592001121
1592001121 Universal-R3 GB 19.11.2004.doc
rel. 1.0
Pa. 3 / 15
2. GENERAL WARNING
WARNING: The Universal-R should always be installed by a suitabley qualified person, in accordance with best
electrical and refrigeration practice. Take time to read the instructions. Do not exceed the relay ratings. The
Universal-R should not be considered a safety device, use suitable safety cutout devices when appropriate.
• 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.
2.1 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.
• The instrument must not be opened.
• Fit the probe where it is not accessible by the End User.
• In case of failure or faulty operation send the instrument back to the distributor with a detailed description of the
fault.
• Do not exceed the maximum current that can be applied to each relay (see Technical Data).
• Ensure that the wires for probes, electrical 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. DIXL930) in parallel with
inductive loads could be useful.
• Heating applications – Do not exceed 105c with the NTC probes supplied. For higher temperatures (up to a
maximum of 150c) use special PTC probes - our Part No. DIXL957.
3. GENERAL DESCRIPTION
Model Universal-R is a 32x74 mm format microprocessor based controller suitable for applications on high, medium or
low temperature refrigeration units. It is provided with three relay outputs to control compressor, defrost - which can be
either electrical or hot gas - and evaporator fans. It can work with PTC or NTC probes. Where defrost is being
terminated by time, it can operate with just one thermostat probe or where defrost is being terminated by temperature, it
has an input for a second (evaporator) probe.
The Universal-R is equipped with an internal alarm buzzer, a flashing visual alarm as well as a 4
th
relay ( volt free ) that
can be configured as Auxiliary, Alarm or to control a heater in Dead Band control (see parameter oAc)
Each instrument is fully configurable through special parameters that can be easily programmed through the keypad.