LAE LTR-5 Series Instructions For Use Manual page 46

BIT25 INSTRUCTIONS FOR USE
Thank you for having chosen an LAE electronic product. Before installing the instrument, please read this instruction booklet
carefully in order to ensure safe installation and optimum performance.
DESCRIPTION INDICATIONS
Thermostat output
Fan output
Defrost output
Activation of 2nd parameter set
Alarm
Fig.1 - Front panel
Increase button / Manual activation.
Info / Setpoint button.
Manual defrost / Decrease button. Exit / Stand-by button.
INSTALLATION
■ The BIT-25 controller has a size 86x82x44 mm (WxHxD).
■ Make sure that electrical connections comply with the paragraph "wiring diagrams". To reduce the effects of electromagnetic
disturbance, keep the sensor and signal cables well separate from the power wires.
■ Place the probe T1 inside the room in a point that truly represents the temperature of the stored product.
■ If present, place the probe T2 on the evaporator where there is the maximum formation of frost.
■ If probe T3 is connected to DI2, its function is determined by the parameter T3M. With T3M=DSP the probe measures the
temperature to be displayed. With T3M=CND the probe measures the condenser temperature, it must therefore be placed between
the fins of the condensing unit.
OPERATION
DISPLAY
During normal operation, the display shows either the temperature measured or one of the following indications:
Defrost in progress Room high temperature alarm
Controller in stand-by Room low temperature alarm
Condenser clean warning Probe T1 failure
Door open alarm Probe T2 failure
Condenser high temperature alarm Probe T3 failure
Generic Alarm
INFO MENU
The information available in this menu is:
Instant probe 1 temperature Minimum probe 1 temperature recorded
Instant probe 2 temperature Compressor working weeks
* **
Instant probe 3 temperature Keypad state lock
*
Maximum probe 1 temperature recorded
*: displayed only if enabled (see §Configuration Parameters) ** : displayed only if ACC > 0
Access to menu and information displayed.
■ Press and immediately release button . SETPOINT : display and modification
■ With button or select the data to be displayed.
■ Press button for at least half second, to display the
■ Press button to display value. setpoint value.
■ To exit from the menu, press button or wait for 10 seconds.
■ By keeping button
Reset of THI, TLO, CND recordings desired value (adjustment is within the minimum SPL and the
■ With button or select the data to be reset.
maximum SPH limit).
■ Display the value with button . ■ When button is released, the new value is stored.
■ While keeping button pressed, use button .
STAND-BY
Button , when pressed for 3 seconds, allows the controller to be put on a standby or output control to be resumed (with SB=YES only).
KEYPAD LOCK
The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controller is operating in
a public place. In the INFO menu, set parameter LOC=YES to inhibit all functions of the buttons. To resume normal operation of
keypad, adjust setting so that LOC=NO.
SELECTION OF SECOND PARAMETER GROUP
It's possible to select control parameters between two different pre-programmed groups, in order for the fundamental control
parameters to be adapted quickly to changing needs. Changeover from Group I to Group II (and vice versa) may take place
MANUALLY by pressing button for 2 seconds (with IISM=MAN), or AUTOMATICALLY when IISM=DI2 and the AUXILIARY
INPUT DI2 is activated (the activation of DI2 selects Group II). If IISM=NON, switchover to Group II is inhibited. The activation of
Group II is signalled by the lighting up of the relevant LED on the controller display.
SETPOINT ADJUSTMENT VIA POTENTIOMETER
With DI2=PSP the setpoint is set via a 10KΩ linear potentiometer connected to DI2. The setpoint changes between PSL (10KΩ)
and PSL+PSR (0Ω) proportionally. With POF=YES, if the potentiometer is turned to the minimum (0Ω), the controller will be put on
standby. If the second parameter group is active, the setpoint used will be IISP.
DEFROST
Automatic defrost. Defrost starts automatically when the defrost timer matches the time value set with DFT.
■ Timed defrost . With DFM=TIM defrosts take place at regular intervals of DFT hours. For example, with DFM=TIM and DFT=06,
a defrost will take place every 6 hours.
■ Optimized defrost . With DFM=FRO the timer is increased only when the condition for frost to form in the evaporator occurs. Once
the DFT value is reached, defrost takes place. If the evaporator works at 0°C, defrost frequency depends on the thermal load and
climatic conditions. With setpoints much lower than 0°C, defrost frequency mainly depends on the refrigerator operating time.
■ Defrost time count backup . At the power-up, if DFB=YES, the defrost timer resumes the time count from where it was left off before
the power interruption. Vice versa, with DFB=NO, the time count re-starts from 0. In stand-by, the accumulated time count is frozen.
Manual or remote defrost start. It's possible to manually start a defrost, by pressing button
started remotely, if DI1=RDS (DI2=RDS), through the making of the auxiliary contact DI1 (DI2).
Defrost type. Once defrost has started, Compressor and Defrost outputs are controlled according to parameter DTY. If FID=YES,
the evaporator fans are active during defrost.
Defrost termination. The actual defrost duration is influenced by a series of parameters.
■ Time termination : T2=NO. the evaporator temperature is not monitored and defrost will last as long as time DTO.
■ Temperature termination : T2=YES. In this case, if the sensor T2 measures the temperature DLI before the time DTO elapses,
defrost will be terminated in advance.
Resuming thermostatic cycle. When defrost is over, if DRN is greater than 0, all outputs will remain off for DRN minutes, in order
for the ice to melt completely and the resulting water to drain. Moreover, the fans will re-start only when the evaporator temperature
is lower than FDD (if T2=YES), or after FTO minutes have elapsed.
Caution: if DFM=NON all defrost functions are inhibited; if DFT=0, automatic defrost functions are excluded; during a high pressure
alarm or a DI1 (DI2) generic alarm, defrost is suspended; during defrost, high temperature alarm is bypassed.
CONFIGURATION PARAMETERS
■ To get access to the parameter configuration menu, press button + for 5 seconds.
■ With button or select the parameter to be modified.
■ Press button to display the value.
■ By keeping button pressed, use button or to set the desired value.
■ When button is released, the newly programmed value is stored and the following parameter is displayed.
■ To exit from the setup, press button or wait for 30 seconds.
PAR RANGE DESCRIPTION
SPL -50..SPH Minimum limit for SP setting.
SPH
SPL...110°C Maximum limit for SP setting.
SP SPL... SPH Setpoint (value to be maintained in the room).
HYS 1.0...10.0°C OFF/ON thermostat differential.
CRT
0...30min Compressor rest time. The output is switched on again after CRT minutes have elapsed since the
previous switchover. We recommend to set CRT=03 with HYS<2.0°.
CT1
0...30min Thermostat output run when probe T1 is faulty. With CT1=0 the output will always remain OFF.
CT2 0...30min Thermostat output stop when probe T1 is faulty. With CT2=0 and CT1>0 the output will always be ON.
Example: CT1=4, CT2= 6: In case of probe T1 failure, the compressor will cycle 4 minutes ON and
6 minutes OFF.
CSD 0..30min Compressor stop delay after the door has been opened (active only if D1=DOR or DI2=DOR).
DFM NON; Defrost start mode
TIM; NON : defrost function is disabled (the following parameter will be FCM).
FRO TIM : regular time defrost.
FRO : the defrost time count is only increased when the conditions occur for frost to form on the
evaporator (optimised time increase).
DFT 0...99 hours Built-in timer value for an automatic defrost to take place.
DFB NO/YES Defrost timer backup. With DFB=YES, after a power interruption, the timer resumes the count from
where it was left off with ±30 min. approximation. With DFB=NO, after a power interruption, the
defrost timer will re-start to count from zero.
DLI -50...110°C Defrost end temperature.
DTO
1...120min Maximum defrost duration.
DTY
OFF; Defrost type
ELE; OFF: off cycle defrost (Compressor and Heater OFF).
GAS ELE: electric defrost (Compressor OFF and Heater ON).
GAS: hot gas defrost (Compressor and Heater ON).
DPD
0...240sec Evaporator pump down. At the beginning of defrost, defrost outputs (determined by DTY) are OFF
for DPD seconds.
DRN 0...30min Pause after defrost (evaporator drain down time).
DDM
RT; Defrost display mode. During defrost the display will show:
LT; RT: the real temperature;
SP; LT : the last temperature before defrost;
DEF SP : the current setpoint value;
DEF : "dEF".
DDY
0...60min Display delay. The display shows the information selected with parameter DDM during defrost and
for DDY minutes after defrost termination.
FID
NO/YES Fans active during defrost.
FDD -50...110°C Evaporator fan re-start temperature after defrost (referred to T2 probe).
FTO 0...120min Maximum evaporator fan stop after defrost.
FCM NON; Fan mode during thermostatic control.
TMP; NON : The fans remain ON all the time;
TIM TMP : Temperature-based control. The fans are ON when the compressor is ON. When the
compressor is turned OFF, the fans remain ON as long as the temperature difference T2-T1 is
greater than FDT. The fans are turned ON again with FDH differential. (T1 = Air temperature, T2 =
Evaporator temperature);
TIM : Timed-based control. The fans
are ON when the compressor is ON.
When the compressor is OFF, the
fans switch ON and OFF according to
parameteres FT1, FT2, FT3.
pressed, use button or to set the
FDT -12.0...0.0°C Evaporator-Air temperature difference for the fans to turn OFF after the compressor has stopped.
FDH 1.0 ...12.0°C Temperature differential for fan re-start.
Example: FDT = -1.0, FDH=3.0. In this case, after the compressor has stopped, the fans are OFF
when T2 > T1 - 1.0 (FDT), whereas the fans are ON when T2 < T1 - 4.0 (FDT-FDH).
FT1
0...180sec Fan stop delay after compressor stop.
FT2 0 ... 30min Timed fan stop. With FT2=0 the fans remain on all the time.
FT3
0 ... 30min Timed fan run. With FT3=0, and FT2 > 0, the fans remain off all the time.
ATM NON; Alarm threshold management.
ABS; NON : all temperature alarms are inhibited (the following parameter will be ADO).
REL ABS : the values programmed in ALA and AHA represent the real alarm thresholds.
REL : the values programmed in ALR and AHR are alarm differentials referred to SP and SP+HYS.
ALA -50 ... 110°C Low temperature alarm threshold.
AHA
-50 ... 110°C High temperature alarm threshold.
ALR -12.0...0.0°C Low temperature alarm differential.
With ALR=0 the low temperature alarm is excluded.
AHR 0.0 ...12.0°C High temperature alarm differential.
With AHR=0 the high temperature alarm is excluded.
for 2 seconds, or defrost may be
ATI
T1; T2; T3 Probe used for temperature alarm detection.
ATD
0 ... 120min Delay before alarm temperature warning.
ADO
0 ... 30min Delay before door open alarm warning.
AHM NON; Operation in case of high condenser alarm
ALR; NON : high condenser alarm inhibited (the following parameter will be ACC).
STP; ALR : in case of alarm, "HC" flashes in the display and the buzzer is switched on.
STP : in addition to the alarm symbols displayed, the compressor is stopped and defrosts are
suspended.
AHT
-50...110°C Condensation temperature alarm (referred to T3 probe). [only if AHM=ALR or AHM=STP]
ACC 0 ... 52 Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches
weeks the ACC value programmed, "CL" flashes in the display. With ACC=0 the condenser cleaning
warning is disabled and CND disappears from Info Menu.
IISM
NON; Switchover mode to second parameter set
MAN; NON : inhibition to use the second parameter group (the following parameter will be SB).
DI2 MAN : button switches the two parameter groups over.
DI2 : switchover to the second parameter group when the auxiliary DI2 input makes.
IISL
IISH
IISP
IIHY
IIFC
IIDF
SB
DI1
DI2
T3M
OS3
PSL
PSR
POF
LSM
OA1
COMPR. COMPR. OFF COMPR.
ON ON
ON
OFF
FT1 FT2 FT3 FT2 FT3
OA2
OS1
T2
OS2
TLD
SCL
SIM
ON ADR
T[°]
OFF
WIRING DIAGRAMS
SP-ALR SP SP+HYS+AHR
Temperature alarm with relative thresholds (ATM=REL).
LCD-5S
N
L
-50... IISH Minimum limit for IISP setting.
IISL... 110°C Maximum limit for IISP setting.
IISL... IISH Setpoint in mode 2.
1.0... 10.0°C OFF/ON differential in mode 2.
NON;
TMP; Fan control in mode 2. See FCM.
TIM
0...99 hours Built-in timer value for an automatic defrost to take place, in mode 2.
NO/YES Stand-by button enabling.
NON; DI1 digital input operation
DOR; NON : digital input 1 not active.
ALR; DOR : door input.
RDS. ALR : when contact opens an alarm is generated (if AHM=STP, the compressor is stopped and
defrosts are suspended).
RDS : when contact makes a defrost is started (remote control).
NON; DI2 digital input operation
DOR; NON : digital input 2 not active.
ALR; DOR : door input.
RDS; ALR : when contact opens an alarm is generated (if AHM=STP, the compressor is stopped and
IISM; defrosts are suspended).
T3; RDS : when contact makes a defrost is started (remote control).
PSP IISM : when contact makes the second parameter group is active.
T3 : probe T3 input.
PSP : potentiometer setpoint input.
DSP; Auxiliary probe T3 operation
CND. DSP : temperature T3 to be displayed.
CND : condenser temperature measurement.
-12.5..12.5°C Probe 3 offset.
-50...70°C Minimum setpoint adjusted via potentiometer.
0.0...15.0 °C Range of setpoint adusted via potentiometer
Example: with PSL=2.0 and PSR=8.0, the setpoint changes between 2.0°C and 10.0°C
(PSL+PSR).
NO/YES Potentiometer standby enabling.
With POF=YES, when the potentiometer is turned to the minimum, the controller will be put on
standby.
NON; Light control mode
MAN; NON : light output not controlled.
D1O; MAN : light ouput controlled through button
D2O; D1O : when DI1 is open, light output is on.
D2C. D2O : when DI2 is open, light output is on.
D2C : when DI2 is closed, light output is on.
NON; AUX 1 output operation
FAN; NON : output disabled (always off).
DEF; FAN : output enabled for fan control.
LGT; DEF : output enabled for defrost control.
0-1; LGT : output enabled for light control.
ALO; 0-1 : the relay contacts follow the on/standby state of controller.
ALC ALO : contacts open when an alarm condition occurs.
ALC : contacts make when an alarm condition occurs.
See OA1 AUX2 output operation. See OA1.
-12.5..12.5°C Probe T1 offset.
NO/YES Probe T2 enabling (evaporator).
-12.5..12.5°C Probe T2 offset.
1...30 min Delay for minimum temperature (TLO) and maximum temperature (THI) logging.
1°C; Readout scale.
2°C; 1°C : measuring range -50...110°C (0.1°C resolution within -9.9 ÷ 19.9°C interval, 1°C outside)
°F 2°C : measuring range -50...110°C
°F : measuring range -58...180°F
0...100 Display slowdown.
1...255 BIT25 address for PC communication.
RS485
PC comm.
A
B
remote data I/O 4 5 6 1 2 3
DI2 DI1
T2 T1
AUX 1 AUX 2
20(8)A 16(4)A 7(2)A
DI2 as input for setpoint
Max total current 30A
potentiometer adjustment
(DI2=PSP)
10 11 12 13 14 16 15 17
Power
Supply
BIT25B1S3E-B
103
92
TECHNICAL DATA
Power supply
BIT25...E 230Vac±10%, 50/60Hz, 3W
BIT25...U 115Vac±10%, 50/60Hz, 3W
BIT25...W 115...230Vac±10%, 50/60Hz, 3W
Relay output max loads
Compressor 20(8)A 240Vac
Auxiliary loads 1 16(4)A 240Vac
Auxiliary loads 2 7(2)A 240Vac
Input
NTC 10KΩ@25°C LAE Part No. SN4...
Measurement Range
-50 / -9.9 ... 19.9 / 110°C
-50...110°C, -58...180°F
Measurement accuracy
<0.5°C within the measurement range
Operating conditions
-10 ... +50°C; 15%...80% r.H.
CE (Approvals and Reference norms)
EN60730-1; EN60730-2-9; EN55022 (Class B);
EN50082-1
DI2 as input for T3
probe (DI2=T3)
5
4
DI2
3 4
2
5
6
1
4 5
DI2
82
VIA PADOVA, 25
31046 ODERZO /TV /ITALY
TEL. +39 - 0422 815320
FAX +39 - 0422 814073
www.lae-electronic.com
E-mail: sales@lae-electronic.com