1592009000 XW220L GB r1.2 03.08.2015
XW220L
1/4
W
ING
XW220L
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
XW220L
,
38x185
mm format, is microprocessor based controller suitable for applications on normal
temperature refrigerating units. It is provided with two relay outputs to control compressor, and the lights
They are also provided with two NTC probe inputs, one for temperature control, one optional, for the display.
There are two digital inputs (free contact) for the door switch and configurable by parameter.
The standard TTL output allows the user to connect, by means of a TTL/RS485 external module, a
ModBUS-
RTU
compatible monitoring system and to programme the parameter list with the
“Hot Key”.
An optional output for remote display
“XW-REP”
is available.
3.
CONTROLLING LOADS
3.1
THE 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
”.
3.2
FAST FREEZING
When defrost is not in progress, it can be activated the keypad by holding the
o
key pressed for about 3
seconds. The compressor operates in continuous mode for the time set through the “
CCt
” parameter. The cycle
can be terminated before the end of the set time using the same activation key,
o
for about 3 seconds.
3.3
DEFROST
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).
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
”.
4.
KEYBOARD
To display and modify target set point; in programming mode it selects a parameter or confirm an
operation.
By holding it pressed for 3s when max or min temperature is displayed it will be erased.
To see the max. stored temperature; in programming mode it browses the parameter codes or
increases the displayed value. By holding it pressed for 3s the fast freezing cycle is started.
To see the min stored temperature; in programming mode it browses the parameter codes or
decreases the displayed value.
By holding it pressed for 3s the defrost is started.
Switch ON and OFF the cold room light.
Switch ON and OFF the instrument.
KEY COMBINATIONS
+
To lock and unlock the keyboard.
+
To enter the programming mode.
+
To exit the programming mode.
4.1
USE OF LEDS
Each LED function is described in the following table.
LED
MODE
Function
ON
The compressor is running
FLASHING
- Programming Phase (flashing with LED
)
- Anti-short cycle delay enabled
FLASHING
Programming Phase (flashing with LED
)
ON
The defrost is enabled
ON
The Fast Freezing cycle is enabled
ON
- ALARM signal
- In “Pr2” indicates that the parameter is also present in “Pr1”
Function of the LEDs placed on the left top side of buttons:
BUTTON
MODE
FUNCTION
SET
FLASHING
The Set point is displayed and it can be modified
SET
FAST FLASHING The Energy Saving is enabled
DEFROST
ON
The Manual Defrost is activated
LIGHT
ON
The Light is ON
ON/OFF
ON
The instrument is OFF
4.2
HOW TO SEE THE MIN TEMPERATURE
1.
Press and release the
n
key.
2.
The “Lo” message will be displayed followed by the minimum temperature recorded.
3.
By pressing the
n
key or waiting for 5s the normal display will be restored.
4.3
HOW TO SEE THE MAX TEMPERATURE
1.
Press and release the
o
key.
2.
The “Hi” message will be displayed followed by the maximum temperature recorded.
3.
By pressing the
o
key or waiting for 5s the normal display will be restored.
4.4
HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
To reset the stored temperature, when max or min temperature is displayed :
1.
Press SET key until “rST” label starts blinking.
N.B. After the installation RESET the temperature stored .
4.5
HOW TO SEE AND MODIFY THE SET POINT
1.
Push and immediately release the
SET
key: the display will show the Set point value;
2.
The SET LED start blinking;
3.
To change the Set value push the
o
or
n
arrows within 10s.
4.
To memorise the new set point value push the
SET
key again or wait 10s.
4.6
TO START A MANUAL DEFROST
1.
Push the
DEF
key for more than 2 seconds and a manual defrost will start.
4.7
TO ENTER IN PARAMETERS LIST “PR1”
To enter the parameter list “Pr1” (user accessible parameters) operate as follows:
1. Enter the Programming mode by pressing the Set and DOWN key for few
seconds (
and
start blinking).
2.
The instrument will show the first parameter present in “Pr1”
4.8
TO ENTER IN PARAMETERS LIST “PR2”
To access parameters in “
Pr2
”:
1.
Enter the “Pr1” level.
2.
Select “Pr2” parameter and press the “
SET
” key.
3.
The “PAS” flashing message is displayed, shortly followed by “0 - -” with a flashing zero.
4.
Use
o
or
n
to input the security code in the flashing digit; confirm the figure by pressing “
SET
”. The
security code is “321“.
5.
If the security code is correct the access to “Pr2” is enabled by pressing “
SET
” on the last digit.
Another possibility is the following: after switching ON the instrument the user can push Set and DOWN keys
within 30 seconds.
NOTE
: each parameter in “Pr2” can be removed or put into “Pr1” (user level) by pressing
“SET”
+
n
. When a
parameter is present in “Pr1” LED
is on.
