Dixell
Operating instructions
1592002910
1592002910 XH460L GB R1.0 18.05.04
XH460L
3/5
7.8
ON/OFF FUNCTION
By pushing the
ON/OFF
key, the instrument shows “OFF” for 5 sec. and the ON/OFF LED
is switched ON.
During the OFF status, all the relays are switched OFF and the regulations are stopped;
N.B. During the OFF status the LED4 button is lighted.
8.
PARAMETER LIST
REGULATION
dbt
half dead band width for temperature:
(0,1÷25,5°C; 1÷45°F) this band is place below and above
the temperature set point (SET_T). The compressor is enabled when the temperature increases
and reaches the SET_T + dbt value. It is turned off when it comes back to the SET_T. The heating
output is enabled when temperature is less than SET_T -dbt value and disabled when the SET_T is
reached.
dbH
half dead band width for humidity:
(0,5÷25,5RH) this band is place below and above the
humidity set point (SET_RH). The dehumidifying action is enabled when the humidity increases and
reaches the SET_RH + dbH value. It is stopped when it comes back to the SET_RH. The
humidifying output is enabled when humidity is less than SET_RH -dbH value and disabled when
the SET_RH is reached.
LS Minimum temperature set point limit:
(-50,0°C SET; -58°F÷SET) Sets the minimum acceptable
value for the set point.
US Maximum temperature set point limit:
(SET 110°C; SET÷230°F) Set the maximum acceptable
value for set point.
OdS Outputs activation delay at start up:
(0÷255 min) This function is enabled at the initial start up of
the instrument and inhibits any output activation for the period of time set in the parameter. (Light
can work)
AC Anti-short cycle delay:
(0÷30 min) interval between the compressor stop and the following restart.
tHu Kind of de-humidifying: db
: only with de-humidifier relay (oA1= dEH)
cHu
with de-humidifier and compressor relay (oA1= dEH)
c-H:
without de-humidifier relay, by means of compressor and heating relays
(oA1 dEH)
.
LSH Minimum humidity set point limit:
(
Lci ÷ Set H
) Sets the minimum acceptable value for the
humidity set point.
USH Maximum humidity set point limit:
(
Set H ÷ uci
) Set the maximum acceptable value for
humidity set point.
DISPLAY AND KIND OF REGULATION
CF Measurement unit: °C
= Celsius;
°F
= Fahrenheit
rES Resolution (for °C)
: allows decimal point display.
dE
= 0,1°C;
in
= 1 °C
rEH Resolution for RH%:
in = integer; Hd= half digit.
trC Kind of behaviour after the end of the cycle
trC=co
the controller goes on working, and maintains the temperature and humidity of the proving
phase, till the controller is stopped.
trC=in
at the end of the proving phase the controller gives the “End” message, the buzzer is turned
on, and the regulation is stopped.
trC=cL
at the end of the proving phase the controller gives the “End” message, the buzzer is turned
on, and the regulation restarts from the freezing phase
trC=cLE
at the end of the proving phase the regulation restarts from the freezing phase.
DEFROST
tdF Defrost type: rE
= electrical heater (Compressor OFF)
in
= hot gas (Compressor and defrost relays ON)
EdF Defrost mode:
in
=
interval mode
. The defrost starts when the time “
Idf
” is expired.
Sd
=
Smartfrost mode
. The time IdF (interval between defrosts) is increased only when the
compressor is running (even non consecutively).
SdF Set point for SMARTFROST
: (-30 30 °C/ -22 86 °F) evaporator temperature which allows the IdF
counting (interval between defrosts) in SMARTFROST mode.
dtE Defrost termination temperature:
(-50,0÷110,0°C; -58÷230°F) (Enabled only when the
evaporator probe is present) sets the temperature measured by the evaporator probe which causes
the end of defrost.
IdF Interval between defrosts:
(1÷120h) Determines the time interval between the beginning of two
defrost cycles.
MdF Duration of defrost:
(0÷255 min) When
P2P = n
, no evaporator probe, it sets the defrost duration,
when
P2P = y
, defrost end based on temperature, it sets the maximum length for defrost.
dFd Display during defrost:
rt
= real temperature;
it
= temperature reading at the defrost start;
Set
= set point;
dEF
= “dEF” label;
dEG
= “dEG” label;
dAd Defrost display time out:
(0 255 min) Sets the maximum time between the end of defrost and the
restarting of the real room temperature display.
Fdt Drain down time:
(0÷60 min.) time interval between reaching defrost termination temperature and
the restoring of the control’s normal operation. This time allows the evaporator to eliminate water
drops that might have formed due to defrost.
dPO First defrost after start-up: y
= Immediately;
n
= after the IdF time
Hud Humidity control during defrost:
no
: the humidity control is stopped during the defrost;
yES
the
humidity control works also during the defrost.
FANS
FnC Fan operating mode: C-n
= running when a load is on, OFF during the defrost;
C-y
= running when a load is on, ON during the defrost;
O-n
= continuous mode, OFF during the defrost;
O-y
= continuous mode, ON during the defrost;
TEMPERATURE ALARMS
ALC Temperature alarm configuration: rE
= High and Low alarms related to Set Point
Ab
= High and low alarms related to the absolute temperature.
ALL Low temperature alarm setting:
ALC = rE
, 0 50 °C or 90°F
ALC = Ab
, - 50°C or -58°F ALU
when this temperature is reached and after the ALd delay time, the LA alarm is enabled,.
ALU High temperature alarm setting:
ALC= rE
, 0
50°C or 90°F
ALC= Ab
, ALL 110°C or 230°F
when this temperature is reached and after the ALd delay time the HA alarm is enabled.
ALH Temperature alarm recovery differential:
(0,1÷25,5°C; 1÷45°F) Intervention differential for
recovery of temperature alarm.
ALd Temperature alarm delay:
(0÷255 min) time interval between the detection of an alarm condition
and the corresponding alarm signalling.
dAO Delay of temperature alarm at start-up:
(0min÷23h 50min) time interval between the detection of
the temperature alarm condition after the instrument power on and the alarm signalling.
EdA Alarm delay at the end of defrost:
(0 255 min) Time interval between the detection of the
temperature alarm condition at the end of defrost and the alarm signalling.
dot Delay of temperature alarm after closing the door :
(0 255 min) Time delay to signal the
temperature alarm condition after closing the door.
HUMIDITY ALARMS
AHC Humidity alarm configuration: rE
= High and Low alarms related to humidity Set Point
Ab
= High and low alarms related to the “absolute” humidity.
AHL Low humidity alarm setting:
(with AHC = rE:
0 ÷ 50
. With AHC = Ab:
Lci ÷ AHu)
when this humidity is reached and after the AHd delay time, the HLA alarm is enabled,.
AHu High humidity alarm setting:
(with AHC = rE: 0÷50°C. with AHC = Ab:
AHL ÷ uci
when this humidity is reached and after the AHd delay time the HHA alarm is enabled.
AHH Humidity alarm recovery differential:
(0.5÷20.0) Intervention differential for recovery of humidity
alarm.
AHd Humidity alarm delay:
(0÷255 min) time interval between the detection of an alarm condition and
the corresponding alarm signalling.
dHo Delay of humidity alarm at start-up:
(0min÷23h 50min) time interval between the detection of the
humidity alarm condition after the instrument power on and the alarm signalling.
doH Alarm delay at the end of defrost:
(0 255 min) Time interval between the detection of the
humidity alarm condition at the end of defrost and the alarm signalling.
doA Open door alarm delay:
(0÷255 min) delay between the detection of the open door condition and
its alarm signalling: the flashing message “
dA
” is displayed.
tbA Alarm relay status after pushing a key: on=
the relay remains on
; off=
the relay is switched off.
nPS Pressure switch number:
(0 15) Number of activation of the pressure switch, during the “
did
”
interval, before signalling the alarm event (I2F= PAL).
If the nPS activation in the “did” time is reached, switch off and on the instrument to restart
normal regulation.
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 Humidity probe calibration:
(-10 10 RH) allows to adjust possible offsets of the humidity probe.
P2P Evaporator probe presence: n
= not present: the defrost stops only by time;
y=
present: the
defrost stops by temperature and time.
P3P Humidity probe presence: n
= not present;
y=
present.
LCI Readout with 4 mA
: (-999 ÷ 999). Adjustment of read out corresponding to 4mA signal.
UCI Readout with 20 mA
: (-999 ÷ 999). Adjustment of read out corresponding to 20mA signal.
DIGITAL INPUTS
i1P Digital input polarity: CL
: the digital input is activated by closing the contact;
OP
: the digital input
is activated by opening the contact
i1F Digital input operating mode:
configure the digital input function:
EAL
= generic alarm;
bAL
=
serious alarm mode;
PAL
= Pressure switch;
Ht
= heating relay safety;
dor
= door switch
odc Outputs status when open door:
on
= normal;
Fan
= Fan OFF;
oFF
= all the loads off
rrd Outputs restarting after doA alarm: no =
outputs not affected by the doA alarm;
yES =
outputs
restart with the doA alarm;
did Time interval/delay for digital input alarm:
(0 255 min.) Time interval to calculate the number of
the pressure switch activation when I1F=PAL. If I1F=EAL or bAL (external alarms), “did” parameter
defines the time delay between the detection and the successive signalling of alarms.
OTHER
oA1
Light relay configuration
(
XH460L terminals 3-4
):
ALr
= alarm;
dEH
= dehumidifier;
onF
= on/off
relay: close with instrument on, open with instrument off;
Lig
= light,
ESt, dEF not select
Adt RS485 serial address for temperature loads
(0÷247) identifies the instrument within a control or
supervising system.
AdH RS485 serial address for humidity loads
(0÷247) identifies the instrument within a control or
supervising system.
Ptb Parameter table:
(read only) it shows the original code of the
dIXEL
parameter map.
rEL Software release:
(read only) Software version of the microprocessor.
Prd Probes display:
(read only) display the temperature values of the evaporator probe Pb2.
Pr2 Access to the protected parameter list
(read only).
9.
DIGITAL INPUT
One digital input is present configurable by user by means of the i1F parameter according to the following
descriptions.
9.1
DOOR SWITCH (I2F = dor)
It signals the door status and the corresponding relay output status through the “
odc
” parameter:
no
=
normal (any change);
Fan
= Fan OFF;
oFF
= all the loads are switched 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 status of loads depends on the “
rrd”
parameter:
with
rrd=no
outputs are not affected by the doA alarm;
with
rrd=yES =
outputs restart with the doA alarm;
The alarm stops as soon as the external digital input is disabled again. During this time and then for the
delay “
dot
” and
“doH”
after closing the door, the temperature and humidity alarms are disabled.
9.2
GENERIC ALARM (I1F = 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.
9.3
SERIOUS ALARM MODE (I2F = 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.
