CT2
0...30min Compressor/Heater 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.
DFM
NON;
TIM;
FRO;
RTC
Defrost start mode
NON : defrost function is disabled (the following parameter will be FCM).
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). 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.
RTC : the defrost time is scheduled by parameters DH1, DH2, ...DH6.
DFT
0...99 hours Time interval among defrosts. When this time has elapsed since the last defrost, a new defrost cycle is started.
For example, with DFM=TIM and DFT=06, a defrost will take place every 6 hours.
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.
DH1
...
DH6
HH.M Scheduled time for defrost 1 to 6. HH hours from midnight, M tens of minutes. Accepted values go from
00.0 to 23.5. After “23.5” the value is “---” that means “skipped defrost”. Example: DH1=8.3 means 8.30
AM.
DLI
-50...110° Defrost end temperature.
DTO
1...120min Maximum defrost duration.
DTY
OFF;
ELE;
GAS
Defrost type.
OFF: off cycle defrost (Compressor and Heater OFF).
ELE: electric defrost (Compressor OFF and Heater ON).
GAS: hot gas defrost (Compressor and Heater ON).
DSO
OFF;
LO;
HI
Defrost start optimisation
OFF : no optimisation.
LO : defrost waits until the compressor cut-out.
HI : defrost waits until the compressor cut-in.
SOD
0...30 min Start optimisation delay.
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
R T;
LT;
SP;
DEF
Defrost display mode. During defrost the display will show:
RT: the real temperature;
LT : the last temperature before defrost;
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° Evaporator fan re-start temperature after defrost.
FTO
0...120min Maximum evaporator fan stop after defrost.
FCM
NON;
TMP;
TIM
Fan mode during thermostatic control.
NON : The fans remain ON all the time;
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 Te-Ta is greater than FDT.
The fans are turned ON again with FDH
differential. (Te = Evaporator temperature,
Ta = Air 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 (See Fig.2).
FDT
-12...0° Evaporator-Air temperature difference for the fans to turn OFF after the compressor has stopped.
FDH
1...12° Temperature differential for fan re-start.
Example: FDT = -1, FDH=3. In this case, after the compressor has stopped, the fans are OFF when Te
> Ta - 1 (FDT), whereas the fans are ON when Te < Ta - 4 (FDT-FDH).
FT1
0...180sec Fan stop delay after compressor/heater 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;
ABS;
REL
Alarm threshold management.
NON : all temperature alarms are inhibited (the following parameter will be ACC).
ABS : the values programmed in ALA and AHA represent the real alarm thresholds.
REL : the alarm threshold is obtained by the sum of setpoint, thermostat differential and ALR/AHR.
ALA
-50... 110°
Low temperature alarm threshold.
AHA
-50... 110°
High temperature alarm threshold.
ALR
-12... 0°
Low temperature alarm differential. With ALR=0 the low temperature alarm is excluded.
AHR
0... 12°
High temperature alarm differential. With AHR=0 the high temperature alarm is excluded.
ATI
T1; T2; T3
Probe used for temperature alarm detection.
ATD
0... 120min
Delay before alarm temperature warning.
ACC
0...52
weeks
Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches the
ACC value programmed, “CL” ashes in the display. With ACC=0 the condenser cleaning warning is
disabled and CND disappears from Info Menu.
IISM
NON;
MAN;
ECO;
DI;
RTC
Switchover mode to second parameter set
NON : inhibition to use the second parameter group (the following parameter will be SB).
MAN : button switches the two parameter groups over.
ECO : automatic switchover to the second parameter group, when ECO conditions are detected.
DI : switchover to the second parameter group when DIx input is on.
RTC : the second parameter group is activated at STT time and deactivated at EDT time.
IISL
-50... IISH
Minimum limit for IISP setting.
IISH
IISL... 110°
Maximum limit for IISP setting.
IISP
IISL... IISH Setpoint in mode 2.
IIH0
1... 10° Thermostat OFF->ON differential in mode 2.
IIH1
0... 10° Thermostat ON->OFF differential in mode 2.
IIDF
0...99 hours Time interval among defrosts in mode 2.
IIFC
NON;TMP;
TIM
Fan control in mode 2. See FCM.
ECS
1...5 Controller sensitivity for the automatic switchover from Group I to Group II (1=minimum, 5=maximum).
EPT
0...240 min
Eco pull-down time. Only with IISM=ECO. Group I parameters are used in regulation for at least EPT
minutes. See Fig.3
SB
NO/YES
Stand-by button enabling.
DSM
NON;
ALR;
STP
Door switch input mode:
NON : door switch inhibited
ALR : when DIx=DOR and the digital input is on, an alarm is generated after ADO minutes
STP : when DIx=DOR and the digital input is on, in addition to the alarm, the fans are immediately
stopped and the compressor is stopped after CSD minutes.
DAD
0...30 min Delay before door open alarm warning.
CSD
0...30 min
NO
Compressor/heater stop delay after door has been opened. If CSD=NO compressor/heater never stops
due to the door opening.
OFF
ON
COMPR.
ON
COMPR.
ON
COMPR. OFF
FT1 FT2 FT3 FT3FT2
Fig.2 Time-optimised fan control (FCM=TIM)
D1O
NON;
DOR;
ALR;
IISM;
RDS
DI1 digital input operation
NON : digital input 1 not active.
DOR : door input.
ALR : when the input is on, an alarm is generated (if AHM=STP, the compressor is stopped and the
defrosts are suspended).
IISM : when the input is on, the controller will use group 2 parameters.
RDS : when the input is on, a defrost is started (remote control).
D1A
OPN; CLS. DI1 digital input activation.
OPN : on open
CLS : on close
D2O
See D1O DI2 digital input operation. See D1O.
D2A
OPN; CLS. DI2 digital input activation. See D1A.
D3O
NON;
...
RDS;
DSY.
DI3 digital input operation
NON ... RDS : See D1O.
DSY : defrost synchronization. The controllers will all start and end defrost together. The rst controller
in defrost will get defrost of all the others started. The last controller ending defrost will get defrost of all
the others stopped.
D3A
OPN; CLS. DI3 digital input activation. See D1A.
LSM
NON;
MAN;
ECO;
DI1, DI2,
DI3;
RTC.
Light control mode
NON : light output not controlled.
MAN : light ouput controlled through button (if OAx=LGT).
ECO : lights activated/deactivated following the ECO state.
DIx : lights activated/deactivated following the DIx state.
RTC : lights change state at STT time, return back at EDT time.
LSA
OPN;
CLS
Light activation (only with LSM=ECO, DIx or RTC).
OPN : lights on with DIx opened, ECO mode deactivated or at EDT time.
CLS : lights on with DIx closed, ECO mode activated or at STT time.
STT
HH.M Start time for timed action.
EDT
HH.M End time for timed actions.
OA1
NON;
LGT;
0-1;
2CU;
2EU;
ALO;
ALC
AUX 1 output operation
NON : output disabled (always off).
LGT : output enabled for light control.
0-1 : the relay contacts follow the on/standby state of controller.
2CU : output programmed for the control of an auxiliary compressor.
2EU : output enabled for the control of the electrical defrost of a second evaporator.
ALO : contacts open when an alarm condition occurs.
ALC : contacts make when an alarm condition occurs.
OA2
See OA1 AUX2 output operation. See OA1.
2CD
0...120 sec Auxiliary compressor start delay. If OAx=2CU the auxiliary output is switched on with a delay of 2CD
seconds after the main compressor has cut-in. Both compressors are turned off at the same time.
OS1
-12.5..12.5° Probe T1 offset.
T2
NO/YES Probe T2 enabling (evaporator).
OS2
-12.5..12.5° Probe T2 offset.
T3
NON;
DSP;
CND;
2EU
Auxiliary probe T3 operation
NON : probe T3 not tted.
DSP : temperature T3 to be displayed.
CND : condenser temperature measurement.
2EU : second evaporator temperature measurement.
OS3
-12.5..12.5° Probe 3 offset.
AHM
NON;
ALR;
STP;
Operation in case of high condenser alarm
NON : high condenser alarm inhibited.
ALR : in case of alarm, “HC” ashes 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°
Condensation temperature alarm (referred to T3 probe).
TLD
1...30 min Delay for minimum temperature (TLO) and maximum temperature (THI) logging.
TDS
T1;
1-2;
T3
Selects the temperature probe to be displayed.
T1 : probe T1
1-2 : the AVG-weighted average between T1 and T2
T3 : probe T3
AVG
0...100% The relative weight of T2 on T1 (if TDS = 1-2)
Example 1: T1 = -5°, T2 = -20°, AVG = 100%. The displayed temperature will be -20° (T1 has no effect)
Example 2: T1 = -5°, T2 = -20°, AVG = 60%. The displayed temperature will be -14.
SCL
1°C;
2°C;
°F
Readout scale.
1°C : measuring range -50…110°C (0.1°C resolution within -9.9 ÷ 19.9°C interval, 1°C outside)
2°C : measuring range -50 … 110°C
°F : measuring range -55 … 180°F
SIM
0...100 Display slowdown.
ADR
1...255 BR1-28 address for PC communication.
SP+HY0
IISP+IIH0
Heavy duty
condition detection
SP
IISP
SP-HY1
IISP-IIH1
EPT EPT
ECO condition
detection
Fig.3 - EPT parameter
WIRING DIAGRAMS5.
DI2
BR1-28
Power Supply
100...240 Vac
data I/O
RS485
PC comm.
12(4)A
16(12)A
A
B
12(4)A 7A
T3
T2
T1
remote
7A
AUX 2AUX 1
Aux
DI1
Remote
unit
L
N
DI3
FUSE 20A
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
INSTALLATION1.
The ■ BR1-28 controller, size 107x95x47 mm (WxHxD), is to be secured to a DIN rail in such a position as to ensure that no liquid
inltrates causing serious damage and compromising safety.
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. ■
Place the probe T2 on the evaporator where there is the maximum formation of frost. ■
The function of probe T3 is determined by the parameter T3. With ■ T3=DSP the probe measures the temperature to be displayed.
With T3=CND the probe measures the condenser temperature, it must therefore be placed between the ns of the condensing
unit. With T3=2EU the probe measures the temperature of the second evaporator and it must therefore be placed where there is
the maximum formation of frost. With T3=NON, the third probe is disabled.
DISPLAY INFO2.
Alarm Room high temperature alarm
Thermostat output Room low temperature alarm
Fan output Condenser high temperature
Defrost output Generic alarm
Activation of 2
nd
set Condenser clean warning
Controller in stand-by Probe T1 failure
Defrost in progress Probe T2 failure
Door open alarm Probe T3 failure
Check clock time
In case of alarm, press any key to mute the buzzer sound.
Info items Navigation
Instant probe 1 temperature
*
Instant probe 2 temperature
*
Instant probe 3 temperature
Minutes of the RTC
Hours of the RTC
Start time for timed actions
End time for timed actions
Max probe 1 temperature
Min probe 1 temperature
**
Compressor working weeks
Keypad state lock
*: only if enabled **: only if ACC > 0
Real Time Clock (RTC) modication (MIN, HRS, STT, EDT)
Increase
Decrease
Keypad Lock THI / TLO / CND reset
OPERATION3.
Setpoint I and II: display and modication Standby (SB=YES)
Increase
Decrease
SELECTION OF SECOND PARAMETER GROUP3.1
Manual (IISM=MAN) Automatic (IISM=ECO) Contact (IISM=DI) Real time clock (IISM=RTC)
Group II:
Start at STT
End at EDT
DEFROST START3.2
Manual Real time clock (DFM=RTC) Timed (DFM=TIM) Optimized (DFM=FRO) Remote (DxO=RDS)
Scheduled at
DH1...DH6 time
DFT hours
T2 < 0°C
for DFT hours
---
+++
27 27 27
BR1-28 BR1-28 BR1-28
28 28 28
DI3 DI3 DI3
Start and end are synchronized
among connected BR1-28
DEFROST TERMINATION3.3
Time limit 1 Evaporator monitor before time limit 2 Evaportators monitor before time limit
DTO minutes
DTO minutes
or
T2 ≥ DLI
DTO minutes
or
T2 and T3 ≥ DLI
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, if probe T2 is active (T2=YES), the fans will re-start
when the evaporator gets to a temperature lower than FDD; Vice versa, if probe T2 is not active (T2=NO) or after defrost has
come to an end, such condition does not occur by end of the time FTO, after FTO minutes have elapsed the fans will be switched
on anyway.
Caution: if DFM=NON or C-H=HEA all defrost functions are inhibited; if DFT=0, automatic defrost functions are excluded. During
defrost, high temperature alarm is bypassed.
CONFIGURATION PARAMETERS4.
Access / Navigation / Modication
PAR RANGE DESCRIPTION
SPL
-50..SPH Minimum limit for SP setting.
SPH
SPL...110° Maximum limit for SP setting.
SP
SPL... SPH Setpoint (value to be maintained in the room).
C-H
REF; HEA Refrigerating (REF) or Heating (HEA) control mode.
HY0
1...10°
Thermostat OFF -> ON differential.
HY1
0...10°
Thermostat ON -> OFF 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 HY0<2.0°.
CT1
0...30min Compressor/Heater output run when probe T1 is faulty. With CT1=0 the output will always remain OFF.
Display value
Exit
Next
Previous
Visualize value
Increase or decrease value
Next or previous parameter
Exit
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.
BR1-28 INSTRUCTIONS FOR USE
= Click = Click and Hold
TECHNICAL DATA6.
Power supply
BR1-28.…W 100-240Vac ±10%, 50/60Hz, 3W
Relay output max loads (240Vac)
BR1-28..S/T..-. BR1-28..Q/R..-.
Compressor 16A resistive
12 FLA 48 RLA
12A resistive
12 FLA 48 RLA
Evap. Fan 16A resistive
4 FLA 12 RLA
12A resistive
4 FLA 12 RLA
Defrost 16A resistive
4 FLA 12 LRA
12A resistive
4 FLA 12 LRA
Auxiliary loads 1 7A resistive 7A resistive
Auxiliary loads 2 7A resistive 7A resistive
Input
NTC 10KΩ@25°C LAE Part No. SN4...
Measurement Range
-50…110°C, -58…180°F
-50 / -9.9 … 19.9 / 110°C
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
RoHS 2011/65/UE
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