Elcold LAB Series User Instructions page 8

Digital controller with off cycle defrost and AUX relay
XR30CH
CONTENTS
1. GENERAL WARNING
2. GENERAL DESCRIPTION
3. CONTROLLING LOADS
4. FRONT PANEL COMMANDS
5. MAX & MIN TEMPERATURE MEMORIZATION
6. MAIN FUNCTIONS
7. PARAMETERS
8. DIGITAL INPUT (ENABLED WITH P3P = N)
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS
10. X-REP OUTPUT – OPTIONAL
11. INSTALLATION AND MOUNTING
12. ELECTRICAL CONNECTIONS
13. HOW TO USE THE HOT KEY
14. ALARM SIGNALS
15. TECHNICAL DATA
16. CONNECTIONS
17. FACTORY SETTINGS DIXELL XR30CH
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.
· 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.
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.
·
Fit the probe where it is not accessible by the End User. The instrument must not be
opened.
·
In case of failure or faulty operation send the instrument back to the distributor or to
"Dixell S.r.l." (see address) with a detailed description of the fault.
·
Consider the maximum current which can be applied to each relay (see Technical Data).
·
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 XR30CH, format 32 x 74 mm, is a digital thermostat with off cycle defrost designed for
refrigeration applications at normal temperature. It provides two relay outputs, one for the
compressor, the other one can be used as light, for alarm signalling or as auxiliary output..
It is also provided with 2 NTC or PTC probe inputs, the first one for temperature control,
the second one, optional, to connect to the HOT KEY terminals to signal the condenser
temperature alarm or to display a temperature. The digital input can operate as third
temperature probe.
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".Defrost
Defrost is performed through a simple stop of the compressor. Parameter "IdF" controls the
interval between defrost cycles, while its length is controlled by parameter "MdF".
Temper.
SET
Compr.
ON
4. FRONT PANEL COMMANDS
6
6
6
6
6
: To display target set point; in programming mode it selects a parameter or confirm
6
an operation
7
(DEF) To start a manual defrost
8
8
8
(UP): To see the max. stored temperature; in programming mode it browses the
8
parameter codes or increases the displayed value.
8
(DOWN):
9
parameter codes or decreases the displayed value.
9
9
To switch the instrument off, if onF = oFF.
9
10
To switch the light, if oA1 = Lig
KEY COMBINATIONS:
+
+
+
4.1 USE OF LEDS
Each LED function is described in the following table.
LED MODE
ON
Flashing
ON
ON
ON
ECO ON
ON
ON
°C/°F ON
°C/°F Flashing
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO SEE THE MIN TEMPERATURE
1.
Press and release the
2.
The "Lo" message will be displayed followed by the minimum temperature recorded.
3.
By pressing the
5.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the
2.
The "Hi" message will be displayed followed by the maximum temperature recorded.
3.
By pressing the
5.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1. Hold press the SET key for more than 3s, while the max. or min temperature is
displayed. ( rSt message will be displayed )
2. 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 SETPOINT
Time
.
To see the min stored temperature; in programming mode it browses the
To lock & unlock the keyboard.
To enter in programming mode.
To return to the room temperature display.
FUNCTION
Compressor enabled
Anti-short cycle delay enabled
Defrost enabled
An alarm is occurring
Continuous cycle is running
Energy saving enabled
Light on
Auxiliary relay on
Measurement unit
Programming phase
key.
key again or by waiting 5s the normal display will be restored.
key.
key again or by waiting 5s the normal display will be restored.
1. Push and immediately release the SET key: the display
will show the Set point value.
2. Push and immediately release the SET key or wait for 5
seconds to display the probe value again.
S i d e
.
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