1592027000 XW10L RTC GB r1.0 09.07.2013.docx
XW10L
1/5
Digital thermostat
XW10L
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.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).
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 XW10L, format 38x185mm, , is a digital thermostat designed for refrigeration applications at
normal temperature. It has 2 relay outputs to control thermostat and light (configurable). A “Day and
Night” function with two different set points is fitted for energy saving. It is also provided with up to
four NTC or PTC probe inputs, the first one for temperature control, the second one for display
temperature of another point. One of the 2 digital inputs can operate as third temperature probe. The
fourth probe is used to signal the condenser temperature alarm or to display a 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
THE REGULATION OUTPUT
The regulation is performed according to the temperature measured by the probe.
The instruments are provided with the CH programmable parameter which enables the user to set
the regulation both for heating or cooling applications:
·
CH = CL: cooling applications
·
CH = Ht: heating applications
3.2
CH = CL: COOLING APPLICATIONS.
The Hy value is automatically set above 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.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “COn” and “COF”.
3.3
CH = HT: HEATING APPLICATION.
Time
Temper.
Heating
ON
SET
SET- HY
Time
The Hy value is automatically set under the Set Point. If the temperature decreases and reaches set
point minus differential the regulation output is activated and then turned off when the temperature
reaches the set point value again.
3.4
LIGHT RELAY CONFIGURATION
The functioning of the auxiliary relay (terminals. 1-3) can be set by the oA3 parameter, according to
the kind of application. In the following paragraph the possible setting:
3.4.1 Auxiliary thermostat
I.E.. anti condensing heater) with the possibility of switching it on and off also by keyboard
Parameters involved:
- ACH Kind of regulation for the auxiliary relay: Ht: heating; cL: cooling;
- SAA Set point for auxiliary relay
- SHy Differential for auxiliary relay
- ArP Probe for auxiliary relay
- Sdd Auxiliary output off during defrost
By means of these 5 parameters the functioning of the auxiliary relay can be set.. The differential is
given by the SHy parameter.
The auxiliary relay can be switched on also by the AUX button. In this case it remains on till it’s
manually switched off.
NOTE: Set oA3 =AUS and ArP= nP (no probe for auxiliary output).
In this case the relay 1-3 can be activated only by digital input with i1F or i2F = AUS.
3.4.2 On/off relay – oA3 = onF
In this case the relay is activated when the controller is turned on and de-activated when the
controller is turned off.
3.4.3 Neutral zone regulation
With oA3 = db the relay 1-3 can control a heater element to perform a neutral zone action.
oA3 cut in = SET-HY
oA3 cut out = SET
3.4.4 Second compressor
With oA3 = CP2, the relay 1-3 operates as second compressor: it is activated in parallel with the
relay of the first compressor, with a possible delay set in the AC1 parameter. Both the compressors
are switched off at the same time.
3.4.5 Alarm
relay
With oA3 = ALr the relay 1-3 operates as alarm relay. It is activated every time an alarm happens.
Its status depends on the tbA parameter: if “tbA = y”, the relay is silenced by pressing any key.
If “tbA = n”, the alarm relay remains on until the alarm condition recovers.
3.4.6 Night blind management during energy saving cycles
With oA3 = HES, the relay 1-3 operates to manage the night blind: the relay is energised when the
energy saving cycle is activated , by digital input, frontal button or RTC (optional)
4.
FRONT PANEL COMMANDS
4.1
STANDARD FRONTAL PANEL
4.2
STEEL FINISHING
: To display target set point; in programming mode it selects a parameter or confirm an
operation.
(DEF)
NOT USED
(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, if onF = oFF.
To switch the light, if oA3 = Lig.
KEY COMBINATIONS:
+
To lock & unlock the keyboard.
+
To enter in programming mode.
+
To return to the room temperature display.
4.3
USE OF LEDS
Each LED function is described in the following table.
LED
MODE
FUNCTION
ON Compressor
enabled
Flashing Anti-short cycle delay enabled
