dIXEL
Operating Instructions
cod. 1592017410
1592017410 XLH360 GB r1.0 15.04.2005.doc
XLH360
3/16
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 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
The
XLH360
is microprocessor controller, suitable for applications on medium or low temperature refrigerating units. It has 6 output relays to
control compressor, heating elements, defrost/extractor fan, fan, de-humidifier/light and humidifier. It has 2 NTC inputs one for thermostat the other
one for defrost. It’s also present a 4÷20mA input for humidity. There is one digital input (free contact) configurable by parameter. An output allows
the user to program the parameter list with the
“Hot Key”.
3.
TEMPERATURE REGULATION
The temperature regulation is performed through neutral zone using compressor and heater output relays.
Set point
OFF
ON
•
Heating
output: CUT IN is “SET TEMP-dbt”, CUT OUT is when the temperature reaches the set point.
•
Compressor
output CUT IN is “ SET TEMP +dbt”, CUT OUT is when the temperature reaches the set point.
3.1
DEFROST
During defrost the temperature control is disabled.
If the second relay is configured as defrost: oA2=dEF
then two defrost modes are available through the “
tdF
” parameter: defrost with electrical
heater (tdF=rE) or hot gas (tdF= in). The defrost interval is control by means of parameter “
EdF
”: (EdF=in) the defrost is made every “
IdF
” time,
(EdF=Sd) the interval “IdF” is calculate through Smart Defrost algorithm (only when the compressor is ON). At the end of defrost dripping time is
started, set by “
Fdt
” parameter. To
disable
the defrost set the
MdF
parameter to
zero
If oA2 is different from dEF, defrost is made only by stopping compressor (tdF=rE).
To disable
defrosts set
MdF=0.
Humidity regulation during defrost depends on the
Hud
parameter.
With
Hud=no
humidity regulation is disabled.
Con
Hud=yES
humidity regulation is performed also during defrost.
4.
HUMIDITY REGULATION
The humidity regulation is performed through neutral zone, by humidifying dehumidifying actions.
Humidity control can be disabled setting the
SET %RH to “nu”
value. In this case only the temperature control is perform.
4.1
HUMIDIFYING ACTION
The humidifying action is done enabling the humidifier relay when the humidity is lower than the “SET %RH-dbH” value.
The relay is switch off when humidity reaches the set values.
