AT1-5 INSTRUCTIONS FOR USE
Thank you for having chosen a LAE electronic product. Before installing the instrument, please read these instructions carefully
to ensure maximum performance and safety.
DESCRIPTION INDICATIONS
Thermostat output
Auxiliary output
Alarm
Fig.1 — Front panel
Info / Setpoint button. Increase / manual activation button.
Manual defrost / Decrease button. Exit / Stand-by button.
INSTALLATION
Insert the controller through a hole measuring 71x29 mm.
Make sur e that electrical connections c omply with t he paragraph “wiring di agrams”. To reduce the e f fec ts o f electromagnetic
disturbance, keep the sensor and signal cables well separate from the power wires.
Fix the controller to the panel by means of the suitable clips, by pressingly gently; if fi tted, check that the rubber gasket
adheres to the panel perfectly, in order to prevent debris and moisture infi ltration to the back of the instrument.
Place the probe T1 inside the room in a point that truly represents the temperature of the stored product.
Place the probe T2 where there is the maximum formation of frost.
OPERATION
DISPLAY
During normal operation, the display shows either the temperature measured or one of the following indications:
DEF
Defrost in progress
HI
Room high temperature alarm
REC
Recovery after defrost
LO
Room low temperature alarm
OFF
Controller in stand-by
E1
Probe T1 failure
CL
Condenser clean warning
E2
Probe T2 failure
DO
Door open alarm
INFO MENU
The information available in this menu is:
T1
Instant probe 1 temperature
TLO
Minimum probe 1 temperature recorded
T2
Instant probe 2 temperature
CND
Compressor working weeks
THI
Maximum probe 1 temperature recorded
LOC
Keypad state lock
Access to menu and information displayed.
Press and immediately release button .
With button
or
select the data to be displayed.
Press button
to display value.
To exit from the menu, press button
X
or wait for 10 seconds.
Reset of THI, TLO, CND recordings
With button
or
select the data to be reset.
Display the value with button .
While keeping button
pressed, use button
X
.
SETPOINT (display and modifi cation of desired temperature value)
Press button
for at least half second, to display the setpoint value.
By keeping button
pressed, use button
or
to set the desired value (adjustment is within the minimum SPL and the
maximum SPH limit).
When button
is released, the new value is stored.
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 controllers 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.
DEFROST
Timed defrost. Defrosting starts automatically when necessary time has elapsed to obtain the defrosting frequency set with
DFR. For example, with DFR = 4 defrosting occurs once every 6 hours. The internal timer is set to zero when power is applied
to the controller and at each subsequent defrost start. When the controller is put on a standby, the accumulated time count is
“frozen” (is not incremented).
Manual defrost. Defrosting may also be induced manually by keeping the button
pressed for 2 seconds.
Defrost type. Once defrost has started, Compressor and Defrost outputs are controlled according to the parameters DTY and
OAU. The AUX output is associated to defrost function with OAU=DEF exclusively.
Defrost termination. Defrost lasts as long as time DTO but, if the evaporator probe has been enabled (T2=YES) and
temperature DLI is achieved before this time elapses, defrost will be terminated in advance.
Caution: if C-H= HEA all defrost functions are inhibited; if DFR = 0 the timed defrost function is excluded; during defrost, the high
temperature alarm is inhibited.
CONFIGURATION PARAMETERS
The setup menu is accessed by pressing button
X
+
for 5 seconds.
With button
or
select the parameter to be modifi ed.
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
X
or wait for 30 seconds.
PAR
RANGE DESCRIPTION
SCL
1°C;
2°C;
°F
Readout scale.
1°C (only with INP= SN4) : measuring range -50 /-9.9 … 19.9 /80 °C
2°C : measuring range -5 0 … 12 0°C
°F : measuring range -55 … 2 40°F
Caution: upon changing the SCL value, it is then absolutely necessary to reconfigure the parame ters relevant to the
absolute and relative temperatures ( SPL, SPH, SP, ALA, AHA, etc..)
SPL
-50..SPH Minimum limit for SP setting
SPH
SPL .120° Maximum limit for SP setting
SP
SPL ... SPH Setpoint (value to be maintained in t he room).
C-H
REF; HEA Refrigerating (REF) or Heat ing ( HEA) control mode
HYS
1...10° OFF/ON thermostat differential
Refrigerating control (C-H= REF ) Heating con trol (C-H=HEA)
CRT
0...30min Compressor rest time. The output is switched on again af ter CRT minutes have elapsed since the previous
switchover. We recommend to set CRT=03 with HYS<2.0°.
CT1
0...30min Thermostat ou tput run when probe T1 is fault y. With CT1= 0 the output will always remain OF F.
CT2
0...30min Thermostat ou tput stop when probe T1 is faulty. With CT2=0 and CT1> 0 the out put will always be ON.
Example: CT1=4, CT2= 6: In case of probe T 1 failure, the compressor will cycle 4 minutes ON and 6 minutes OFF.
CSD
0..3 0min Compressor stop delay after the door has been opened (active only if DS=YES).
DFR
0... 24(1/ 24h) Defros t frequency expressed in cycles /24 hours.
DLI
-50...120° Defrost end temperature.
DTO
1...120min Maximum defros t 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) .
* The defrost output is active if only OAU =DEF.
DDY
0...60min Display during defrost. If DDY=0 during defros t the temperature continues to be displayed. If DDY > 0, during defros t
the display shows DEF, when defrost is over REC is displayed during DDY minutes.
ATM
NON;
ABS;
REL
Alarm threshold management.
NON : all temperature alarms are inhibited ( the following parameter will be ADO).
ABS: the values programmed in ALA and AHA represent t he real alarm thresholds.
REL: the values programmed in ALR and AHR are alarm differentials referred to SP and SP+HY.
Temperature alarm with relative thresholds, Temperature alarm wi th relative thresholds,
refrigerating control (ATM =REL, C-H=REF ) . heating control (ATM =REL, C-H=HEA).
ALA
-50... 120° Low temperature alarm threshold.
AHA
-50... 120° High temperat ure alarm threshold.
ALR
-12... 0° Low temperature alarm differential. W ith ALR=0 the low temperature alarm is excluded.
AHR
0... 12° High temperature alarm dif ferential. Wi th AHR= 0 the high temperature alarm is excluded.
ATD
0... 120min Delay before alarm temperature warning.
ADO
0... 30min Delay before door open alarm warning.
ACC
0...52
weeks
Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches t he ACC value
programmed, “CL” flashes in t he display. Wi th ACC= 0 the condenser cleaning warning is disabled.
SB
NO/YES
Stand-by but ton enabling
.
DS
NO/YE S Door switch input enabling ( closed when door is closed) .
OAU
NON;
0-1;
DEF;
LGT;
ALR;
AUX output operation
NON : ou tput disabled (always off) .
0-1 : the relay contacts follow the on /standby st ate of controller.
DEF : output programmed for defrost control.
LGT : output enabled for light control.
ALR : contacts make when an alarm condition occurs.
INP
SN4; ST1 Temperature sensor selection. With INP = SN 4, the probes must be the LAE models SN4. .; with INP = ST 1, the probes
must be the LAE models ST 1.. .
OS1
-12.5..12. 5° C Probe T1 offset.
T2
NO/YE S Probe T2 enabling ( evaporator).
OS2
-12.5..12. 5° C Probe T2 offset.
TLD
1...30 min Delay for minimum temperature (TLO) and maximum temperature (THI) logging.
SIM
0...100 Display slowdown.
ADR
1...255 AT1-5 address for PC communication.
WIRING DIAGRAM
TECHNICAL DATA
Power supply
AT1-5…E 23 0Vac±10%, 50 /60Hz, 3W
AT1-5…U 115Vac ±10 % , 50/60Hz, 3W
AT1-5…D 12Vac ±10% , 50/ 60Hz , 3W
Relay outputs
AT1-5.Q1(2)… compressor 12(4)A
AT1-5.S1(2)… compressor 16(4)A
AT1-5.Q3(4)… compressor 12(5)A
AT1-5.S3(4)… compressor 16(5)A
AT1-5.Q5(6)… compressor 12(8)A
AT1-5.S5(6)… compressor 16(8)A
Auxiliary loads 7(2)A 240vac
AT1-5.Q… maximum total current 12 A
AT1-5.S… maximum total current 16A
Inputs
NTC 10KΩ@25°C, LAE part No. SN4...
PTC 1000Ω@25°C, LAE part No. ST1…
Measuring Range
-50…120°C, -55…240°F
-50 / -9 .9 … 19.9 / 80 °C (with NT C10K only)
Measuring accuracy
<0 .5°C within the measurement range
Operating conditions
-10 … +50°C; 15%...80% r.H.
CE – UL (Approvals and Reference Norms)
EN60730-1; EN60730-2-9;
EN5 5022 (Class B) ;
EN50082-1
UL 60730-1A
Front protection
IP55
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
PARTNER VENEZIA • 041 5460713
16(5)A
T1
ComT2
door
switch
7(2)A
230Vac
54231
78 91110
TTL
AUX
16A
door
AT1-5BS4E-AG
OFF
ON
SP SP+HY
T[°]
OFF
ON
SPSP-HY
T[°]
OFF
ON
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