Dixell
Installing and Operating Instructions
rel.1.0 –07/03/2002 - cod.
1592013000
1592013000 XM440_460K GB
XM440K & XM460K
3/1
6.2
TO SET THE TIME AND THE WEEKLY HOLIDAYS
1.
Push the
n
key for more than 3 seconds
2.
The current time is displayed.
3.
By pushing the SET key, setting the current hour, minutes, day and
the weekly holidays (up to 3) will be possible.
4.
To exit, press SET + UP or wait 15s without pressing any key.
6.3
TO SET THE DEFROST TIMES
Only T640 and V640 keyboards
1.
Push the
n
key for more than 3 seconds
2.
The current time is displayed.
3.
By pushing DEF key, the DEF led will start flashing and setting defrost time will
be possible.
4.
To exit, press SET + UP or wait 15s without pressing any key.
7.
PARAMETER LIST
REGULATION
Hy Differential:
(0,1÷25,5°C; 1÷45°F): Intervention differential for set point, always positive. Solenoid
valve Cut IN is Set Point Plus Differential (Hy). Solenoid valve Cut OUT is when the temperature
reaches the set point.
LS Minimum set point limit: (-50,0°C
÷
SET; -58°F÷SET) Sets the minimum acceptable value for the
set point.
US Maximum 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. (AUX
and Light can work)
AC Anti-short cycle delay: (0÷30 min) interval between the solenoid valve stop and the following
restart.
Con solenoid valve ON time with faulty probe: (0÷255 min) time during which the solenoid valve is
active in case of faulty thermostat probe. With COn=0 solenoid valve is always OFF.
COF solenoid valve OFF time with faulty probe: (0÷255 min) time during which the solenoid valve is
off in case of faulty thermostat probe. With COF=0 solenoid valve is always active.
DISPLAY
CF Temperature measurement unit: °C = Celsius; °F = Fahrenheit . When the measurement unit is
changed the SET point and the values of the regulation parameters have to be modified
rES Resolution (for °C): (in = 1°C; de = 0,1°C) allows decimal point display.
de = 0,1°C; in = 1 °C
Lod Local display : select which probe is displayed by the remote display (T850)
P1 = Thermostat probe
P2 = Evaporator probe
P3 = auxiliary probe
1r2 = difference between P1 and P2 (P1-P2)
DEFROST
tdF Defrost type:
rE = electrical heater (SOLENOID VALVE OFF)
in = hot gas (SOLENOID VALVE and defrost relays ON)
EdF Defrost mode:
rtc
= Real Time Clock mode. Defrost time follows Ld1÷Ld8 parameters on workdays and
Sd1÷Sd8 on holidays.
in = interval mode. The defrost starts when the time “Idf” is expired.
Sd = Smart Defrost mode. The time IdF (interval between defrosts) is increased only when the
solenoid valve is active (even non consecutively) and only if the evaporator temperature is less
than the value in "SdF” (set point for SMARTFROST).
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 (Maximum) 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
FANS (XM460K)
FnC Fan operating mode:
C-n = running with the solenoid valve, OFF during the defrost;
C-y = running with the solenoid valve, ON during the defrost;
O-n = continuous mode, OFF during the defrost;
O-y = continuous mode, ON during the defrost;
Fnd Fan delay after defrost: (0÷255 min) The time interval between the defrost end and evaporator
fans start.
FSt Fan stop temperature: (-50÷110°C; -58÷230°F) setting of temperature, detected by evaporator
probe, above which the fan is always OFF.
ALARMS
ALC Temperature alarm configuration
rE = High and Low alarms related to Set Point
Ab = High and low alarms related to the absolute temperature.
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.
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,.
AFH Temperature alarm and fan differential: (0,1÷25,5°C; 1÷45°F) Intervention differential for
temperature alarm set point and fan regulation set point, always positive.
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.
tbA Buzzer and alarm relay silencing: by pushing one of the keypad buttons.
n= Only the Buzzer is silenced;
y= Buzzer and relay are silenced.
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÷30°C / -54÷54°F) sets the
increasing value of the set point during the Energy Saving cycle.
DIGITAL INPUTS
I1P Energy saving digital 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;
dFr
= Start defrost;
AUS
= Relay AUX actuation;
onF = remote On/OFF.
Hdf
= Holiday function.
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.
bbC Type of keyboard: (4bb
÷
8bb min.) State the kind of keyboard used: 4bb=4 keys, 6bb= 6 keys,
8bb= 8 keys
TO SET CURRENT TIME AND WEEKLY HOLIDAYS
CbP Clock board present (y ÷ n) Presence of the RTC
Hur Current hour (0 ÷ 23 h)
Min Current minute (0 ÷ 59min)
dAY Current day (Sun ÷ SAt)
Hd1 First weekly holiday (Sun ÷ nu) Set the first day of the week which follows the holiday times.
Hd2 Second weekly holiday (Sun ÷ nu) Set the second day of the week which follows the holiday
times.
Hd3 Third weekly holiday (Sun ÷ nu) Set the third day of the week which follows the holiday times.
N.B. Hd1,Hd2,Hd3 can be set also as “nu” value (Not Used).
TO SET DEFROST TIMES
Ld1÷Ld8 Workday defrost start (0 ÷ 23h 50 min.) These parameters set the beginning of the eight
programmable defrost cycles during workdays. Ex. When Ld2 = 12.4 the second defrost starts at
12.40 during workdays.
Sd1÷Sd8 Holiday defrost start (0 ÷ 23h 50 min.) These parameters set the beginning of the eight
programmable defrost cycles on holidays. Ex. When Sd2 = 3.4 the second defrost starts at 3.40 on
holidays.
N.B. :
To disable a defrost cycle set it to “nu”(not used).
Ex. If Ld6=nu ; the sixth defrost cycle is disabled
L.A.N. CONFIGURATION
LSn L.A.N. section number (1 ÷ 5) States the number of sections available in the L.A.N.
Lan L.A.N. serial address (1 ÷ LSn) Identifies the instrument address inside local network of
multiplexed cabinet controller.
LSP L.A.N. set-point synchronisation
y= the section set-point, when modified, is updated to the same value on all the other sections
n= the set-point value is modified only in the local section
