LAE AC1-2W Digital Thermostat Instruction Manual

LAE AC1-2W Digital Thermostat

AC1-2W INSTRUCTION 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

INDICATION

• OUT1 Channel 1 output
• OUT2 Channel 2 output
• L 1 Channel 1 setpoint modification
• L 2 Channel 2 setpoint modification
• ALARM
• Info / Enter button
• Modify Setpoint 1 / Decrease button
• Increase / Modify Setpoint 2 button
• Exit / Stand-by button

INSTALLATION

• The AC1-2W sizes 110x75x55 mm (WxHxD). Fix the plate to the panel using 2 cheese-headed screws with 4 or 5 mm diameter and then apply the instrument casing to the plate. This should be done for vertical panels and for correct positioning of the instrument with the outlets at the bottom.
• 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.

OPERATION

DISPLAY
During normal operation, the display shows either the temperature measured or one of the following indications:

MENU INFO
The information available in this menu is:

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 or wait for 10 seconds.
  Reset of THI, TLO recordings

  • With button or select the data to be reset.
  • Display the value with button .
  • While keeping button pressed, use button .

CHANNEL 1 SETPOINT (display and modification of desired temperature value)

• Press and release button L1  : the LED L1 blinks, the display shows 1SP for 1 second and then the setpoint associated value.
• Press buttons or to set the desired value (adjustment is within the minimum SPL and maximum SPH limit).
• To store the new value press button ↵ , or wait for 10 seconds.
• To go back to normal mode without saving the new value, press .

CHANNEL 2 SETPOINT

• With the auxiliary output set as thermostat control (OAU=THR), it’s possible to modify setpoint 2 during the normal operation of the controller.
• Press and release button L2 : the LED L2 blinks, the display shows 2SP for 1 second if setpoint 2 is an absolute threshold (2SM=ABS), alternatively the display shows 2DF, if setpoint 2 is a
• threshold relative to setpoint 1 (2SM=REL), then the value associated to the parameter appears.
• Press buttons or to set the desired value.
• To store the new value press button ↵ or wait for 10 seconds.
• To go back to normal mode without saving the new value, press .

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.

CONTROLLER AUTOTUNING IN PID MODE

Before starting
In the setup mode (see configuration parameters): set 1CM=PID; make sure that 1CH matches the desired operation mode (1CH=REF for refrigerating control, 1CH=HEA for heating control); then adjust setpoint 1SP at the desired value.

Start autotuning
During normal operation, keep buttons + pressed for 3 seconds. 1CT blinks on the display. With + or set the cycle time in order to define the dynamic of the process to be controlled. To abort the autotuning function, press ; to start autotuning press + or wait for 30 seconds.

During autotuning
During the entire autotuning phase, the display alternates TUN with the actual temperature measured. In case of power failure, when power is resumed, after the initial autotest phase, the controller resumes the autotuning function. To abort the auto tuning, without modifying the previous control parameters, keep button pressed for 3 seconds. After the auto tuning has taken place successfully, the controller updates the control parameters and start to control.

Errors
If the autotuning function failed, the display shows an error code:

• E1 timeout1 error: the controller could not bring the temperature within the proportional band. Increase 1SP in case of heating control, vice versa, decrease 1SP in case of refrigerating control
• E2 timeout2 error: the autotuning has not ended within the maximum time allowed (1000 cycle times). Re-start the autotuning process and set a longer cycle time 1CT.
• E3 temperature overrange: check that the error was not caused by a probe malfunction, then decrease 1SP in case of heating  control, vice versa increase 1SP in case of refrigerating control and then re-start the process.
• To eliminate the error indication and return to the normal mode, press button .

Control improvement

• To reduce overshoot, reduce the integral action reset 1AR
•  To increase the response speed of the system, reduce the proportional band 1PB. Caution: doing this makes the system less stable.
• To reduce swings in steady-state temperature, increase the integral action time 1IT; system stability is thus increased, although its response speed is decreased.
• To increase the speed of response to the variations in temperature, increase the derivative action time 1DT. Caution: a high value makes the system sensitive to small variations and it may be a source of instability.

RECALIBRATION

• Have a precision reference thermometer or a calibrator to hand. Ensure that OS1=0 and SIM=0.
• Switch the controller off then on again.■■
• During the auto-test phase, press buttons + and keep them pressed till the controller shows 0AD.
• With buttons and select 0AD or SAD: 0AD allows a calibration of 0, inserting a constant correction over the whole scale of measurement. SAD allows a calibration of the top part of the measurement scale with a proportional correction between the calibration point and 0.
• Press  to display the value and then use + or to make the read value coincide with the value measured by the reference instrument.
• Exit from calibration by pressing button .

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 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

INPUT SPECIFICATIONS

[< ±0.6°F(-20÷260°),±2°F]
INP=SN4| NTC 10K Ω (LAE SN4..)| -40/-19.9 ÷ 99.9/125°C [<±0.3°C(-40÷100°),±1°C]| -40 ÷ 125°C [<±0.3°C(-40÷100°),±1°C]| -40 ÷ 260°F [<±0.6°F(-40÷210°), ±2°F]

WIRING DIAGRAMS

TECHNICAL DATA

• Power supply
  AC1-2W…D 12Vac/dc ±10%, 2W
  AC1-2W…E 230Vac±10%, 50/60Hz, 2W
  AC1-2W…U 115Vac±10%, 50/60Hz, 2W

• Relay outputs (AC1-2W..R..)
  OUT1 8(3)A
  OUT2 8(3)A

• SSR drive (AC1-2W..F..)
  OUT1 15mA 12Vdc
  OUT2 15mA 12Vdc

• Inputs
  see table of input specifications

• Measurement range
  see table of input specifications

• Measurement accuracy
  see table of input specifications

• Operating conditions
  -10 … +50°C; 15%…80% r.H.

• CE (Reference Norms)
  EN60730-1; EN60730-2-9;
  EN55022 (Class B); EN50082-1

• Front protection
  IP55

VIA PADOVA, 25
31046 ODERZO /TV /ITALY TEL. +39 – 0422 815320 FAX +39 – 0422 814073
Website: www.lae-electronic.com
E-mail: sales@lae-electronic.com

References

• electronic.com is for sale | www.oxley.com
• Lae Electronic

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