Dixell
Installing and Operating Instructions
rel.1.0 –25/10/2000 - cod. 1592009540
1592009540 XW272K_full GB
XW272K
3/5
AOS Analogue output start point: (-50÷110°C or -58°÷230°F). Sets the temperature at which the
analogue output begins.
APB Analogue output band width: (-50÷110°C or -58°÷230°F) sets the width of the regulation band for
the analogue output. If APb is
positive then it is above the start point and the kind of action is direct
(condenser application). If APb is
negative then it is below the start point and the kind of action is
inverse (evaporator application).
CAO Input type for the analogue output: four input types can be selected:
P1=room probe temperature; P2 = evaporator probe temperature; P3=temperature of the third probe;
1r2= temperature difference between the room probe and the evaporator probe
PROBE INPUTS
Ot Thermostat probe calibration: (-12.0
÷
12.0°C/ -21
÷
21°F) allows to adjust possible offset of the
thermostat probe.
OE Evaporator probe calibration: (-12.0
÷
12.0°C/ -21
÷
21°F) allows to adjust possible offsets of the
evaporator probe.
O3 Auxiliary probe calibration: (-12.0
÷
12.0°C/ -21
÷
21°F) allows to adjust possible offsets of the
evaporator probe.
P2P Evaporator probe presence:
n= not present: the defrost stops only by time; y= present: the defrost stops by temperature and time.
P3P Auxiliary probe presence: n= not present; y= present.
HES Temperature increase during the Energy Saving cycle : (-30,0°C
÷
30,0°C / -22÷86°F) sets the
increasing value of the set point during the Energy Saving cycle.
DIGITAL INPUTS
odc Compressor and fan status when open door:
no = normal; Fan = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan OFF.
I1P Door switch input polarity:
CL : the digital input is activated by closing the contact;
OP : the digital input is activated by opening the contact.
I2P Configurable digital input polarity:
CL : the digital input is activated by closing the contact;
OP : the digital input is activated by opening the contact
I2F Digital input operating mode: configure the digital input function:
EAL
= generic alarm;
bAL = serious alarm mode; PAL = Pressure switch;
dFr = Start defrost; AUS = Not used; Es = Energy Saving; onF = remote On/OFF.
did Time interval/delay for digital input alarm:(0
÷
255 min.) Time interval to calculate the number of the
pressure switch activation when I2F=PAL. If I2F=EAL or bAL (external alarms), “did” parameter defines
the time delay between the detection and the successive signalling of the alarm.
OTHER
Adr RS485 serial address (1÷247): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
Rel Release software: (read only) Software version of the microprocessor.
Ptb Parameter table: (read only) it shows the original code of the
dIXEL
parameter map.
Prd Probes display: (read only) display the temperature values of the evaporator probe Pb2 and the
auxiliary probe Pb3.
Pr2 Access to the protected parameter list (read only).
6.
DIGITAL INPUTS
The Wing series can support up to 2 free contact digital inputs. One is always configured as door switch, the
second is programmable in seven different configurations by the “
I2F” parameter.
6.1
DOOR SWITCH INPUT
It signals the door status and the corresponding relay output status through the “
odc” parameter:
no = normal (any change);
Fan = Fan OFF;
CPr = Compressor OFF;
F_C = Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter “
dOA”, the alarm output is enabled and
the display shows the message “
dA”. The alarm stops as soon as the external digital input is disabled again.
During this time and then for the delay “
dot” after closing the door, the high and low temperature alarms are
disabled.
6.2
CONFIGURABLE INPUT - GENERIC ALARM (EAL)
As soon as the digital input is activated the unit will wait for “
did” time delay before signalling the “EAL” alarm
message. The outputs status don’t change. The alarm stops just after the digital input is de-activated.
6.3
CONFIGURABLE INPUT - SERIOUS ALARM MODE (BAL)
When the digital input is activated, the unit will wait for “
did” delay before signalling the “BAL” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
6.4
CONFIGURABLE INPUT - PRESSURE SWITCH (PAL)
If during the interval time set by “
did” parameter, the pressure switch has reached the number of activation of
the “
nPS” parameter, the “PAL” pressure alarm message will be displayed. The compressor and the
regulation are stopped. When the digital input is ON the compressor is always OFF.
6.5
CONFIGURABLE INPUT - START DEFROST (DFR)
It executes a defrost if there are the right conditions. After the defrost is finished, the normal regulation will
restart only if the digital input is disabled otherwise the instrument will wait until the “Mdf” safety time is
expired.
6.6
CONFIGURABLE INPUT - ENERGY SAVING (ES)
The Energy Saving function allows to change the set point value as the result of the SET+ HES (parmeter)
sum. This function is enabled until the digital input is activated.
6.7
CONFIGURABLE INPUT - REMOTE ON/OFF (ONF)
This function allows to switch ON and OFF the instrument.
6.8
DIGITAL INPUTS POLARITY
The digital inputs polarity depends on “
I1P” and “I2P” parameters.
CL : the digital input is activated by closing the contact.
OP : the digital input is activated by opening the contact
7.
ANALOGUE OUTPUT 4÷20 mA (OPTIONAL)
The analogue output is obtained through a 4
÷
20mA signal proportional to the input selected in parameter
“
CAO”. Through the analogue output the speed of fans can be regulated according to the input variable.
The following input types can be selected through the “
CAO” parameter:
“
CAO” = P1 room
temperature
“
CAO” = P2 evaporator
temperature
“
CAO” = P3 third probe temperature
“
CAO” = 1r2 room temperature - evaporator temperature
To adjust the analogue output the following parameters are available:
“
AOS” = Start point for analogue output
“
APb” = Band width for analogue output can be either positive (direct action) and negative
(inverse action).
Named T the input, the relationship input-output is given by the following charts
NOTE: When the defrost is in progress, the analogue output is set to the minimum value (4 mA). This
condition lasts until the defrost terminates.
8.
INSTALLATION AND MOUNTING
T620 keyboard shall be mounted on vertical panel, in a 150x31 mm hole, and fixed using two screws
∅
3 x
2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod. RG-L). Power module
XW272K shall be mounted in a panel with two or more screws and it must be connected to the keyboard by
means of a two-wire cable (
∅
1mm). The temperature range allowed for correct operation is 0 - 60 °C. Avoid
places subject to strong vibrations, corrosive gases, excessive dirt or humidity. The same recommendations
apply to probes. Let the air circulate by the cooling holes.
8.1
T620 CUT OUT
165
150
31
+0.5
-0
+0
.5 -0
+1
-1
Ø3 x2
8.2
MOUNTING WITH KEYBOARD COVER OPENING DOWNWARD
