UNIVERSAL–R
1592031000 Univ-R4 GB - r1.1 - 2012.07.23 Universal-R 2/20
GREAT NEW FEATURES on the Universal-R
DUAL VOLTAGE 12V & 230V POWER SUPPLY
Both low (12Vac/dc) and high voltage (230Vac) power supply inputs are
present in this single controller (see the rear connections of the device).
QUICK AND SAFE START UP FUNCTION SELECTION
Direct selection of the controller functionality by pressing a dedicated button,
during a fixed time interval, at start up.
NEW FRONT FASCIA DESIGN
Display with illuminated icons to indicate loads, alarms, status indications.
Six buttons give direct access to main functions and menu.
DOUBLE EVAPORATOR DEFROST FUNCTION
A new feature allows defrost control of twin evaporators. The 4th (AUX) relay
and probe 3 (Pb3) control defrost of the second evaporator. Only when both
have terminated will refrigeration re-start. Independent parameters are
present to control the second evaporator.
ON/OFF BUTTON
Dedicated button to switch the controller on and off.
1592031000 Univ-R4 GB - r1.1 - 2012.07.23 Universal-R 3/20
1. INDEX
1. INDEX____________________________________________________________________________________3
2. GENERAL WARNING _______________________________________________________________________4
3. GENERAL DESCRIPTION ___________________________________________________________________4
4. QUICK START UP PROCEDURE – Up and running in 5 easy steps __________________________________5
5. TYPICAL CONNECTIONS - FOR GENERAL GUIDANCE ONLY _____________________________________6
6. PARAMETER TABLE and factory default settings _________________________________________________7
7. PARAMETERS – THEIR FUNCTIONS IN DETAIL _______________________________________________10
8. BUTTONS AND THEIR FUNCTIONS__________________________________________________________15
9. PROGRAMMING MODE____________________________________________________________________15
10. OTHER FEATURES OF THE UNIVERSAL-R ___________________________________________________16
11. THERMOSTAT OVERRIDE ( not available when parameter tC = 1 or 7 )______________________________16
12. DEFROST TYPES_________________________________________________________________________16
13. EVAPORATOR FAN CONTROL (only when parameter tC = 5 or 6) __________________________________16
14. SPECIAL APPLICATIONS – DEAD BAND CONTROL ____________________________________________17
15. ALARMS_________________________________________________________________________________17
16. REMOVING SECURITY LEVEL PROTECTION__________________________________________________17
17. MOUNTING ______________________________________________________________________________18
18. ELECTRICAL CONNECTIONS_______________________________________________________________18
19. PROBES_________________________________________________________________________________18
20. TECHNICAL DATA ________________________________________________________________________18
21. FAULT FINDING _________________________________________________________________________19
1592031000 Univ-R4 GB - r1.1 - 2012.07.23 Universal-R 4/20
2. GENERAL WARNING
WARNING: The Universal-R should always be installed by a suitable 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.
Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring the same and unchanged
functionality.
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 probes where they are 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 away to 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 105°C with the NTC probes supplied. For higher temperatures (up to a maximum of 150°C)
use special PTC probes (e.g. our Part No. DIXL957).
3. GENERAL DESCRIPTION
Model Universal-R is a 71x29 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 both 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. Where defrost is being terminated by temperature, it has an input for an evaporator probe(s).
The Universal-R is equipped with an internal alarm buzzer, a flashing visual alarm as well as a 4th relay (volt free) that can be configured
as Auxiliary or Alarm, to control a heater in Dead Band control (see parameter oAC) or to control the defrosting of a second evaporator
(when “tC” parameter is set to 6).
Double evaporator defrost: When tC=6, the controller is set up to defrost twin evaporators. Defrost of both evaporators will start
simultaneously but each evaporator will terminate defrost individually on temperature. Only when both evaporators have terminated defrost,
will the controller revert to refrigeration.
Each instrument is fully configurable through special parameters that can be easily programmed through the keypad.
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4. QUICK START UP PROCEDURE – Up and running in 5 easy steps
This Quick Start Up section is designed to get you up and running with the minimum of fuss. Just follow these 5 simple steps.
STEP 1
Install the new Universal-R, connect the correct number of probes and
connect the wiring - See below:
1. Table 1: parameter tC settings
2. Section 5: Typical connections
STEP 2
Turn on power,
THEN WITHIN 1 MINUTE COMPLETE STEPS 3, 4 AND 5.
STEP 3
Press the “DOWN” key for 3 seconds and the controller will automatically
recognise and adjust itself to the type of probes connected. (The display
briefly shows tPd followed by ntC or PtC).
STEP 4
Press the “AUX/tC” key for 3 seconds and the setting of parameter tC is
displayed. Use the UP or DOWN keys to adjust to required setting then
confirm by pressing SET (see table 1 below).
STEP 5
Press SET for 3 seconds until the °C or °F icon starts to flash, then adjust
the SET POINT using the UP or DOWN keys, then press SET again to
confirm.
Notes:
1. All probes must be of the same type, either PTC or NTC;
2. Probes must be at between -50 to 60°C for auto recognition to work;
3. If 1 minute expires before you have completed quick set up, either turn OFF / ON power to start set up again or enter
parameter as per the instructions and adjust your parameter settings manually (see Section 9).
Table 1: parameter “tC” settings
Parameter
tC
Type of Control
Required
probes
1 On / Off thermostat – Cooling x 1
2 Off cycle defrost (timed) x 1
3 Electrical / Hot Gas defrost, time initiated / time terminated x 1
4 Electrical / Hot Gas defrost, time initiated / temperature terminated x 2
5 Electrical / Hot Gas defrost, time initiated / temperature terminated + evap. fan delay x 2
6 Double evaporators applications (similar to setting 5) x 3
7 On / Off thermostat – Heating x 1
Note: “tC” settings 3, 4, 5 and 6 use Electrical defrost as default. Hot Gas is possible by setting parameter “tdF” for gas defrost. Settings
1, 2, 3 & 7 do not require that the 2nd and the 3rd probe to be fitted. Take note of the number of probes to be connected for the selected
application.
As you change parameter tC, defaults change and should be approximately correct for that application but we strongly
recommend you check all parameter default values listed in these instructions to ensure they suit your particular application
and make further adjustments if necessary. Read the following sections for information about programming.
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5. TYPICAL CONNECTIONS - FOR GENERAL GUIDANCE ONLY
Table 2: typical connections
Parameter tC = 1, 2
On / Off thermostat or Off Cycle Defrost Controller.
Parameter tC = 3
Forced defrost controller, time initiated & time terminated.
Parameter tC = 4
Forced defrost controller, time initiated & temperature
terminated.
Parameter tC = 5
Forced defrost controller, time initiated & temperature
terminated with evaporator fan delay after defrost.
Parameter tC = 6
Double evaporator applications.
Parameter tC = 7
Heating applications.
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