1592009000 XW220L GB r1.2 03.08.2015
XW220L
3/4
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.
INSTALLATION AND MOUNTING
Instruments
XW220L
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). 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.
7.1
CUT OUT
165
150
31
+0.5
-0
+0
.5
-0
+1
-1
Ø3 x2
7.2
MOUNTING WITH KEYBOARD COVER OPENING DOWNWARD
CLICK!
1
2
2
3
3
1
1
7.3
MOUNTING WITH KEYBOARD COVER OPENING UPWARD
CLICK!
1
2
2
2
3
3
1
1
8.
ELECTRICAL CONNECTIONS
The instruments are provided with screw terminal block to connect cables with a cross section up to 2,5 mm
2
for
the digital and analogue inputs. Relays and power supply have a Faston connection (6,3mm). Heat-resistant
cables have to be used. Before connecting cables make sure the power supply complies with the instrument’s
requirements. Separate the probe cables from the power supply cables, from the outputs and the power
connections. Do not exceed the maximum current allowed on each relay, in case of heavier loads use a suitable
external relay.
N.B.
Maximum current allowed for all the loads is 20A.
8.1
PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is
recommended to place the thermostat probe away from air streams to correctly measure the average room
temperature.
9.
TTL SERIAL LINE
The TTL connector allows, by means of the external module TTL/RS485, to connect the unit to a network line
ModBUS-RTU
compatible as the Dixell monitoring system XJ500 (Version 3.0).
The same TTL connector is used to upload and download the parameter list of the “
HOT KEY
“.
10.
USE OF THE PROGRAMMING “HOT KEY “
The Wing units can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the
“Hot
Key”
and vice-versa.
10.1
DOWNLOAD (FROM THE “HOT KEY” TO THE INSTRUMENT)
1.
Turn OFF the instrument by means of the ON/OFF key, remove the TTL serial cable if present, insert
the
“Hot Key”
and then turn the Wing ON.
2.
Automatically the parameter list of the
“Hot Key”
is downloaded into the Wing memory, the “
DoL
”
message is blinking. After 10 seconds the instrument will restart working with the new parameters.
3.
Turn OFF the instrument remove the
“Hot Key”,
plug in the TTL serial cable, then turn it ON again.
At the end of the data transfer phase the instrument displays the following messages:
“
end
“ for right programming. The instrument starts regularly with the new programming.
“
err
” for failed programming. In this case turn the unit off and then on if you want to restart the download again
or remove the “
Hot key
” to abort the operation.
10.2
UPLOAD (FROM THE INSTRUMENT TO THE “HOT KEY”)
1.
Turn OFF the instrument by means of the ON/OFF key and remove the TTL serial cable if present; then
turn it ON again.
2.
When the Wing unit is ON, insert the “
Hot key
” and push
o
key; the
"uPL"
message appears.
3.
Push “
SET”
key to start the UPLOAD; the “
uPL
” message is blinking.
4.
Turn OFF the instrument remove the
“Hot Key”,
plug in the TTL serial cable, then turn it ON again.
At the end of the data transfer phase the instrument displays the following messages:
“
end
“ for right programming.
“
err
” for failed programming. In this case push “SET” key if you want to restart the programming again or
remove the not programmed “
Hot key
”.
11.
ALARM SIGNALS
Message Cause
Outputs
“P1”
Thermostat probe failure
Alarm output ON; Compressor output according to
parameters “COn” and “COF”
“P3”
Auxiliary probe failure
Alarm output ON; Other outputs unchanged
“HA”
Maximum temperature alarm
Alarm output ON; Other outputs unchanged
“LA”
Minimum temperature alarm
Alarm output ON; Other outputs unchanged
“EE”
Data or memory failure
Alarm output ON; Other outputs unchanged
“dA”
Defrost timeout alarm
Alarm output ON; Other outputs unchanged
“dAL”
Door switch alarm
Alarm output ON; Other outputs unchanged
“EAL”
External alarm
Alarm output ON; Other outputs unchanged
“BAL”
Serious external alarm
Alarm output ON; Other outputs OFF
“PAL”
Pressure switch alarm
Alarm output ON; Other outputs OFF
The alarm message is displayed until the alarm condition is recovery.
All the alarm messages are showed alternating with the room temperature except for the “P1” which is flashing.
To reset the “EE” alarm and restart the normal functioning press any key, the “
rSt
” message is displayed for
about 3s.
11.1
SILENCING BUZZER
Once the alarm signal is detected the buzzer and the relay are is silenced by pressing any key.
11.2
“EE” ALARM
The Dixell instruments are provided with an internal check for the data integrity. Alarm “EE” flashes when a
failure in the memory data occurs. In such cases the alarm output is enabled.
11.3
ALARM RECOVERY
Probe alarms : “
P1
” (probe1 faulty), and “
P3
”; they automatically stop 10s after the probe restarts normal
operation. Check connections before replacing the probe.
Temperature alarms “
HA
” and “
LA
” automatically stop as soon as the thermostat temperature returns to normal
values or when the defrost starts.
Door switch alarm “
dA
” stop as soon as the door is closed.
External alarms “
EAL
”, “
BAL
” stop as soon as the external digital input is disabled “
PAL
” alarm is recovered by
switching OFF the instrument.
