dixell XW460L Installing And Operating Instructions

dIXEL
XW460L/XW460V
DUAL TEMPERATURE CONTROLLER

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.
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
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

The XW460L/XW460V are instruments able to control 2 temperatures in an independent mode. The
first section is suitable for applications on refrigerating and ventilating units where temperatures used
are medium or low. This section is provided with three relay outputs: one for compressor, one for
Defrost and another for evaporator fans. The second section is suitable for medium or low temperature
applications. This section is provided with one relay output for compressor control, the defrost process
is actuated with simple compressor stop. These instruments are provided with three configurable probe
inputs (NTC or PTC), first for control temperature of section 1, second to survey end defrost
temperature for section 1 and third for control temperature of section 2. There is also one configurable
digital input (free contact). All devices may be connected to monitoring system with serial output and
ModBUS-RTU communication protocol. All instruments are configurable with parameters simply
programmable from keyboard.

3. REGULATION

For both sections there are two kinds of actions available: management of cooling process or heating
process. Type of action is selected with cH1/cH2 parameter.

3.1 TYPE OF ACTION

CH1/2 parameters change action of the sections: cH1/cH2 = CL: refrigerating action (1/2); cH1/cH2 =
Ht: heating action (1/2)

3.2 CH1/CH2 = CL FOR COOLING ACTION

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)
compressor is started and then turned off
when the temperature reaches the set
point value again.
In case of fault in thermostat probe
compressor starts and stops via
"COn1(2)" and "COF1(2)" time.

3.3 CH1/CH2 = HT FOR HEATING ACTION

For each section, the regulation is performed
according to the temperature measured by its
own thermostat probe with a negative differential
from the set point. If temperature decreases and
reaches set point 1/2 minus differential 1/2 the
output is activated and then turned off when the
temperature reaches the set point value again
and then turned off when the temperature
reaches the set point value again.
NOTE: For turn-off defrost you can set
MdF1/MdF2 = 0.

4. DEFROST

4.1 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 "EdF":
- 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 "IdF" time;
-
- Sd the interval "IdF" is calculate through Smart Defrost algorithm (only when the comp. is ON)
At the end of defrost the drip time is controlled through the "Fdt" parameter.
1592018230 XW460L-V GB r1.0 04.07.2005.doc r 1.0 *
Installing and Operating Instructions
4.2 SECTION 2
For the section 2 the defrost is realized with simply stop of compressor. Depending on "idF2"
parameter you may be configure interval between two defrosting cycles, while them during time is
controlled with "MdF2" parameter.

4.3 RELATION BETWEEN DEFROSTS

Different kinds of defrosts are available for each section. The relation between defrosts is set by the
dFS parameter: relation between defrosts.
Four relation between the 2 sections of the controller are available, to manage different kinds of
applications: in = independent defrosts; StS = same defrost start, synchronised defrost end; St = same
defrost start, independent defrost end; SE = sequential defrost.
4.3.1
The defrosts of the 2 sections of controller are completely independent. First section: defrost interval is
set by idF1 parameter. Second section: defrost interval is set by idF2 parameter.
The defrost interval is control by means of parameter "EdF1(2)":
-
-
formation of
Manual defrost activation, by pushing the DOWN key (defrost 1) or UP key (defrost 2).
By pushing the Down key or Up key for 3s, a defrost request is generated for section 1 or 2
respectively. The defrost interval is re-loaded.
4.3.2
defrost start, end defrost independent.
The defrost of the 2 sections of controller starts at the same time. idF1 parameter sets the defrost
interval for both the sections. The defrosts are performed at regular interval if EdF1 = in or according to
the Smartdefrost algorithm if EdF1 = Sd.
With dFS = StS regulation restarts only when defrost is finished for both the sections. The section that
finishes the defrost before the other starts dripping time until also the other section has not finished its
defrost.
Manual defrost activation, by pushing the DOWN key (defrost 1) or UP key (defrost 2).
By pushing the Down key or Up key for 3s, a defrost request is generated for both the sections 1 and 2.
The defrost interval is re-loaded.
With dFS = St each section restarts regulation as soon as its defrost is finished.
4.3.3
The defrost of 2 sections is synchronised. idF1 parameter sets the defrost interval for both the sections.
Defrosts are performed at regular interval if EdF1 = in or according to the Smartdefrost algorithm if
EdF1 = Sd. Section 1 does its defrost first, at the end of the defrost of section 1, section 2 starts its
defrost.
Manual defrost activation, by pushing the DOWN key (defrost 1) or UP key (defrost 2).
By pushing the Down key or Up key for 3s, a defrost request is generated for both the sections 1 and 2.
The defrost interval is re-loaded.

5. CONTROL OF EVAPORATOR FANS (ONLY FOR SECTION 1)

Section 1 has 1 relay to control evaporator fan.
The fan control mode is selected by means of the "FnC1" parameter: FnC1 = C-n fans will switch ON
and OFF with the compressor and not run during defrost; FnC1 = O-n fans will run continuously, but
not during defrost; FnC1 = C-y fans will switch ON and OFF with the compressor and run during
defrost; FnC1 = O-y fans will run continuously also during defrost. After defrost, the fans is turned-on
only if Fnd1 time is ended. An additional parameter "FSt1" provides the setting of temperature, detected
by the evaporator probe, above which the fans are always OFF. This can be used to make sure
circulation of air only if his temperature is lower than set in "FSt1".

6. THE DISPLAY

SET1/2 To display and modify target set point 1/2,in programming mode it selects a parameter or
n/
o/

6.1 MEANING OF THE ICONS

XW460L/XW460V

dFS= in - independent defrosts

in the defrost is made every "idF" time
Sd the interval "idF" is calculate through Smart Defrost algorithm (only when the comp. is ON)
dFS = StS – Same defrost start, end defrost synchronised or dFS = St - Same
dFS = SE – sequential defrost
1 2
2
2
1
1
2 2
1 1
XW460V
light activation/deactivation
1
Button not enabled
2
Section 1 Stand-By button
1
1 2
2
2 Section 2 Stand-By button
2
1
1
2 2
1 1
KEY COMBINATIONS
o n
2 +
2 2
n
SET1 +
1
1 1
o
SET1 +
2 1
confirm an operation
(DOWN/DEFROST 1) in programming mode it browses the parameter
codes or decreases the displayed value. By holding it pressed for 3s the
defrost for section 1 is started.
(UP/DEFROST 2) in programming mode it browses the parameter codes
or increases the displayed value. By holding it pressed for 3s the defrost
for section 2 is started.
FUNCTION
Icon Meaning
ON Celsius degree
1592018230
XW460L
2
2 2 2
1
1 1
1
To lock and unlock the keyboard.
To enter the programming mode.
To exit the programming mode
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