Dixell
Operating instructions
1592002910
1592002910 XH460L GB R1.0 18.05.04
XH460L
4/5
9.4
PRESSURE SWITCH (I2F = 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.
If the nPS activation in the did time is reached, switch off and on the instrument to restart normal
regulation.
9.5
HEATING RELAY SAFETY (i1F=Ht)
With
i1F=Ht
as soon as the digital input is activated for “
did
” time heating relay is disabled.
The alarm will stop as soon as the digital input is de-activated.
9.6
DIGITAL INPUTS POLARITY
The digital input polarity depends on the “
i1P
” parameters.
CL
: the digital input is activated by closing the contact.
OP
: the digital input is activated by opening the contact
10.
INSTALLATION AND MOUNTING
Instruments
XW240L
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.
10.1
XH460L: CUT OUT
165
150
31
+0.5
-0
+0
.5
-0
+1
-1
Ø3 x2
11.
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.
11.1
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.
12.
HOW TO USE THE HOT KEY
12.1
HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1.
Program one controller with the front keypad.
2.
When the controller is ON, insert the “
Hot key
” and push
o
key; the
"uPL"
message appears
followed a by flashing
“End”
3.
Push “
SET”
key and the
End
will stop flashing.
4.
Turn OFF the instrument remove the
“Hot Key”,
then turn it ON again.
NOTE
: the “
Err
” message is displayed for failed programming. In this case push again
o
key if you want
to restart the upload again or remove the “
Hot key
” to abort the operation.
12.2
HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY (DOWNLOAD)
1.
Turn OFF the instrument.
2.
Insert a
programmed “Hot Key” into the 5 PIN receptacle
and then turn the Controller ON.
3.
Automatically the parameter list of the
“Hot Key”
is downloaded into the Controller memory, the
“
doL
” message is blinking followed a by flashing
“End”.
4.
After 10 seconds the instrument will restart working with the new parameters.
5.
Remove the
“Hot Key”.
.
NOTE
the message “
Err
” is displayed 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.
13.
ALARM SIGNALLING
Message Cause
Outputs
“P1”
Thermostat probe failure
Compressor and heating outputs off
“P2”
Evaporator probe failure
Defrost and by time
“P3”
Humidity probe failure
Humidity regulation off
“HA”
High temperature alarm
Outputs unchanged
“LA”
Low temperature alarm
Outputs unchanged
“HHA” High humidity alarm
Outputs unchanged
“HLA” Low humidity alarm
Outputs unchanged
“dA”
Door switch alarm
Outputs depending on the odC parameter
“EAL” External alarm
Other outputs unchanged
“BAL” Serious external alarm
Outputs OFF
“PAL” Pressure switch alarm
Outputs OFF
The alarm message is displayed until the alarm condition recoveries.
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.
13.1
SILENCING BUZZER
Once the alarm signal is detected the buzzer, if present, can be silenced by pressing any key.
13.2
ALARM RECOVERY
Probe alarms
: “
P1
” (probe1 faulty), “
P2
”, “
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.
Humidity alarms
“
HHA
” and “
LHA
” automatically stop as soon as the humidity returns to normal values.
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
Pressure switch alarm
“
PAL” alarm is recovered by switching OFF the instrument
.
14.
TECHNICAL DATA
Housing:
self extinguishing ABS.
Case: XH460L:
facia 38x185 mm; depth 76mm;
Mounting: XH460L:
panel mounting in a 150x31 mm panel cut-out with two screws. 3 x 2mm.
Distance between the holes 165mm
Protection:
IP20.
Frontal protection:
IP65 with optional frontal gasket mod. RG-L (XH460L);
Connections:
Screw terminal block 2,5 mm
2
heat-resistant wiring and 6,3mm Faston
Power supply:
230Vac or 110Vac 10%;
Power absorption:
7VA max.
Display
: double d icons.
Inputs
: 1 NTC probe + 4÷20mA probe
Digital input
: 1 free voltage
Relay outputs: compressor:
relay SPST 20(8) A, 250Vac;
heather:
relay SPST 8(3) A, 250Vac;
defrost:
relay SPST 8(3) A, 250Vac
fans:
relay SPST 8(3) A, 250Vac;
humidifier:
relay SPST 8(3) A, 250Vac
de-humidifier:
relay SPST 8(3) A, 250Vac
Other output :
alarm buzzer (optional)
Data storing
: on the non-volatile memory (EEPROM).
Kind of action:
1B.;
Pollution grade:
normal;
Software class:
A.
Operating temperature:
0÷60 °C.;
Storage temperature:
-25÷60 °C.
Relative humidity:
20 85% (no condensing)
Measuring and regulation range:
NTC probe:
-40÷110°C (-58÷230°F)
Resolution:
0,1 °C or 1°C or 1 °F (selectable).
Accuracy (ambient temp. 25°C)
: ±0,5 °C ±1 digit
15.
WIRING CONNECTIONS
15.1
XH460L
R
oo
m
11
9 10
12 13
17
16
18 19
21 22 23
14 15
L
N
Comp
20(8)A
250V
~
6
2
7
3
8
4
5
1
Fan
8(3)A
250V
~
8(3)A
250V
~
8(3)A
250V
~
8(3)A
250V
~
D
ef
20
Heater
Hum
8(3)A
250V
~
Def
NC
Supply 115Vac
: 14-15 terminals
16.
DEFAULT SETTING VALUES
Set temperature
Set humidity
Duration
Freezing Phase
5.0 °C
50.0 RH%
5.00 h
Proving Phase
5.0 °C
50.0 RH%
5.00 h
Label Value Menu
Description
Range
dbt
2.0
Pr1
Half dead band width for temperature
0.1°C o 1°F ÷ 25°C o 77°F
dbH
5.0
Pr1
Half dead band width for humidity
0.5 ÷ 50
LS
-40.0
Pr2
Minimum temperature set point limit
-50.0°C o –58°F ÷ Set T
uS
110
Pr2
Maximum temperature set point limit
Set T ÷ 110°C o 230°F
odS
1
Pr2
Outputs activation delay at start up
0 ÷ 250 min
Ac
1
Pr1
Anti-short cycle delay
0 ÷ 30 min
tHu
c-H
Pr2
Humidity regulation
db
= dehumidifier relay.;
cHu
= dehum+ compr.;
c-H=
without dehum. relay
LSH
0.0
Pr2
Minimum humidity set point limit
Lci ÷ Set H
uSH
100
Pr2
Maximum humidity set point limit
Set H ÷ uci
cF
°C
Pr2
Measurement unit
°C ÷°F
rES
dE
Pr2
Resolution (for °C):
in = integer / dE = decimal
rEH
Hd
Pr2
Resolution for RH%:
in = integer / Hd = half digit
trC
co
Pr2
Instrument behaviour at the end of the cycle
co
=start hoolding,
in
=stop
regulation,
cL
=restart the first
phase+End message;
cLE
=
restart the first phase
tdf
rE
Pr2
Defrost type
rE, rT, in
EdF
in
Pr2
Defrost mode
In, Sd
SdF
0.0
Pr2
Set point for SMART DEFROST
-30 ÷ +30°C / -22÷+86°F
dtE
8.0
Pr2
Defrost termination temperature
-50,0÷110°C/ -58÷230°F
idF
6
Pr1
Interval between defrosts
1 ÷ 120 h
MdF
20
Pr1
Duration of defrost
0 ÷ 250 min
dFd
it
Pr2
Display during defrost
rt / it / SEt / dEF / dEG
dAd
30
Pr2
Defrost display time out
0 ÷ 250 min
