dIXEL
Installing and Operating Instructions
1598029050
1598029050 XW40L NFR GB r1.0 11.07.2008.doc
XW40L
2/3
6.5.2 HOW TO MOVE A PARAMETER FROM THE HIDDEN MENU TO THE
FIRST LEVEL AND VICEVERSA.
Each parameter present in the HIDDEN MENU can be removed or put into “THE FIRST LEVEL”
(user level) by pressing
“SET +
n
”
.
In HIDDEN MENU when a parameter is present in First Level the decimal point is on.
6.6
HOW TO LOCK THE KEYBOARD
1.
Keep pressed for more than 3 s the
UP
+
DOWN
keys.
2.
The “POF” message will be displayed and the keyboard will be locked. At this point it will be
possible only to see the set point or the MAX o Min temperature stored
3.
If a key is pressed more than 3s the “POF” message will be displayed.
6.7
TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the
o
and
n
keys, till the
“Pon”
message will be
displayed.
6.8
THE CONTINUOUS CYCLE
When defrost is not in progress, it can be activated by holding the “
o
” key pressed for about 3
seconds. The compressor operates to maintain the “
ccS
” set point 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 3 seconds.
6.9
THE ON/OFF FUNCTION
With “
onF = oFF
”, pushing the
ON/OFF
key, the instrument is switched off. The
“OFF”
message is displayed. In this configuration, the regulation is disabled.
To switch the instrument on, push again the ON/OFF key.
WARNING: Loads connected to the normally closed contacts of the relays are always
supplied and under voltage, even if the instrument is in stand by mode.
7.
PARAMETERS
REGULATION
Hy Differential
: (0,1 ÷ 25,5°C / 1÷255 °F) Intervention differential for set point. Compressor Cut IN
is Set Point + differential (Hy). Compressor Cut OUT is when the temperature reaches the set
point.
LS Minimum set point:
(- 50°C÷SET/-58°F÷SET): Sets the minimum value for the set point.
US Maximum set point:
(SET÷110°C/ SET÷230°F). Set the maximum value for set point.
Ot Thermostat probe calibration
: (-12.0÷12.0°C; -120÷120°F) allows to adjust possible offset of
the thermostat probe.
P2P Evaporator probe presence: n
= not present: the defrost stops by time;
y=
present: the defrost
stops by temperature.
OE Evaporator probe calibration:
(-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of
the evaporator probe.
OdS Outputs activation delay at start up:
(0÷255min) 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.
AC Anti-short cycle delay
: (0÷50 min) minimum interval between the compressor stop and the
following restart.
CCt Compressor ON time during continuous cycle:
(0.0÷24.0h; res. 10min) Allows to set the
length of the continuous cycle: compressor stays on without interruption for the CCt time. Can be
used, for instance, when the room is filled with new products.
CCS Set point for continuous cycle:
(-50÷150°C) it sets the set point used during the continuous
cycle.
COn Compressor ON time with faulty probe:
(0÷255 min) time during which the compressor is
active in case of faulty thermostat probe. With COn=0 compressor is always OFF.
COF Compressor OFF time with faulty probe:
(0÷255 min) time during which the compressor is
OFF in case of faulty thermostat probe. With COF=0 compressor is always active.
DISPLAY
CF Temperature measurement unit:
°C=
Celsius;
°F
=Fahrenheit. WARNING: When the
measurement unit is changed the SET point and the values of the parameters Hy, LS, US, Ot,
ALU and ALL have to be checked and modified if necessary).
rES Resolution (for °C)
: (in = 1°C; dE = 0.1 °C) allows decimal point display.
DEFROST
tdF Defrost type
: EL = electrical heater; in = hot gas
dtE Defrost termination temperature
: (-50÷50 °C/
-58÷122°F) (Enabled only when EdF=Pb) sets the temperature measured by the evaporator
probe, which causes the end of defrost.
IdF Interval between defrost cycles
: (0÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF (Maximum) length for defrost
: (0÷255min) When
P2P = n
, (not evaporator probe: timed
defrost) it sets the defrost duration, when
P2P = y
(defrost end based on temperature) it sets
the maximum length for defrost.
dFd Temperature displayed during defrost
: (
rt
= real temperature;
it
= temperature at defrost
start;
SEt
= set point;
dEF
= “dEF” label)
dAd MAX display delay after defrost
: (0÷255min). Sets the maximum time between the end of
defrost and the restarting of the real room temperature display.
Fdt Drip time
: (0
÷
120 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)
dAF Defrost delay after continuous cycle
: (0
÷
23.5h) time interval between the end of the fast
freezing cycle and the following defrost related to it.
ALARMS
ALC Temperature alarms configuration:
(Ab; rE)
Ab
= absolute temperature: alarm temperature is given by the ALL or ALU values.
rE
=
temperature alarms are referred to the set point. Temperature alarm is enabled when the
temperature exceeds the “SET+ALU” or “SET-ALL” values.
ALU MAXIMUM temperature alarm
: (SET÷110°C; SET÷230°F) when this temperature is reached
the alarm is enabled, after the “ALd” delay time.
ALL Minimum temperature alarm
: (-50.0 ÷ SET °C; -58÷230°F when this temperature is reached
the alarm is enabled, after the “ALd” delay time.
ALd Temperature alarm delay
: (0÷255 min) time interval between the detection of an alarm
condition and alarm signalling.
dAO Exclusion of temperature alarm at start-up
: (from 0.0 min to 23.5h) time interval between the
detection of the temperature alarm condition after instrument power on and alarm signalling.
OTHER
Adr Serial address
(1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
rEL Software release
for internal use
.
Ptb Parameter table code:
readable only
.
8.
TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter,
XJ485-CX
, to connect the instrument to a monitoring system
ModBUS-RTU
compatible such as the X-WEB500/3000/300.
9.
X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the dedicated
connector.
To connect the X-REP to the
instrument the following
connectors must be used
CAB/REP1(1m), CAB/REP2
(2m), CAB/REP5 (5m),
10.
INSTALLATION AND MOUNTING
The controller
XW40L
, 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
CUT OUT
10.2
STEEL FINISHING MOUNTING
1
1
2
2
3
3
4
4
RG-LX gascke
(optional)
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 CONNECTION
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. Place the defrost termination probe among the evaporator
fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
