Download
Share
Print this page
Smart temp SMT-IAQ3 Manual
  1. Manuals
  2. Brands
  3. Smart temp Manuals
  4. Measuring Instruments
  5. SMT-IAQ3
  6. Manual

Smart temp SMT-IAQ3 Manual

Indoor air quality monitor
Hide thumbs

Advertisement

Quick Links

Download this manual
SMT-IAQ3
Indoor Air Quality Monitor
Manual Ver 1.0

Advertisement

loading
Need help?

Need help?

Do you have a question about the SMT-IAQ3 and is the answer not in the manual?

Questions and answers

Summary of Contents for Smart temp SMT-IAQ3

  • Page 1 SMT-IAQ3 Indoor Air Quality Monitor Manual Ver 1.0...
  • Page 2 Thank you for your purchase of the Smart Temp Australia P/L SMT-IAQ3 indoor air quality monitor and controller. This device has been designed and built by Smart Temp Australia P/L to be an exceptionally reliable and advanced control system. Great effort has been taken to ensure that the SMT-IAQ3 is extremely easy to use and capable of monitoring and controlling indoor air quality in safest and the most energy efficient manner possible.
  • Page 3 Not all display elements or buttons shown may be active in your SMT-IAQ3. The display is dynamic and functions not applicable will not be shown. The alarm mute button for example, will not be shown until the alarm is sounding.

  • Page 4: User Operation

    The “Force Fresh Air” button will flash when pressed to indicate that it is running. The SMT-IAQ3 backlight can also change colour from green, to amber then red to visually indicate the quality of the air in the room in a clear manner, if enabled.

  • Page 5: Terminal Layout

    Terminal Layout By using a small flat blade screwdriver placed in the bottom centre of the enclosure you can pry the sensor enclosure apart. Take care not to drop the Display as damage may occur. When replacing the face on the sensor ensure all wiring is free of the terminals on the base and will not foul on the pins when you close the two halves.
  • Page 6 O-10V Output The SMT-IAQ3 has 3 x 0-10V outputs. One each for carbon dioxide, temperature, and relative humidity. All 0-10V outputs wiring is the same. Wire between the required output and the 0V / Com terminals. The output voltage will increase with increasing temperature, humidity, or carbon dioxide levels.
  • Page 7 Relay The SMT-IAQ3 has a single volt free relay with changeover contacts. The relay is rated to carry 30V @1A Max. Any voltage applied to the relay common terminal will switch between the normally open (NO) and normally closed (NC) terminals. This relay can be set to respond to high levels of temperature, relative humidity or carbon dioxide as selected in the installer options.
  • Page 8 Power The SMT-IAQ3 can be powered from any AC or DC power supply from 12 to 30V AC or DC. AC power is not polarity dependant however if powering the SMT-IAQ3 from DC power ensure the positive voltage is applied to the top AC+ terminal.
  • Page 9 Power Up When you first apply power to the SMT-IAQ3 it will briefly show all LCD elements and then display the firmware version for a few seconds. During the next 180 seconds the display will countdown from 180 to 0 to permit the CO2 and other sensors to stabilise.

  • Page 10: Installation And Mounting

    Caution DO NOT use any solvents or aggressive cleaning chemicals such as strong chlorine-based cleaners in the air near the SMT-IAQ3 as these solvents, if used frequently may affect the accuracy of the CO2 sensor. This sensor should be protected from fine dust if possible. It is not suited (unless modified) to monitoring the indoor air quality in a bakery for example where flour is used.
  • Page 11 Advanced Installer Options Menu The SMT-IAQ3 can be tuned to meet the needs of the specific application. Within this advanced installer options menu, you can adjust how the SMT-IAQ3 responds to and reports the levels of carbon dioxide, temperature, and humidity.
  • Page 12 To advance through the menu items tap the “Next” button and adjust the shown installer option with the up / down button. To exit the installer menu and save changes press and hold the “Next” button for 3 seconds. After making changes in this menu DO NOT power down for 15 seconds or changes may be discarded.
  • Page 13 Calibrate Should you feel that the IAQ3 temperature sensor accuracy Temp has drifted you are permitted to apply a small, fixed offset. Default is 0.0. Options are +/- 5 deg C or F on 0.1 steps. Calibrate RH Should you feel that the IAQ3 humidity sensor accuracy has drifted you are permitted to apply a small, fixed offset.
  • Page 14 CO2 Alarm You can set a carbon dioxide value that will turn on the volt Relay free alarm relay. Default is OFF. Options are OFF, then 400ppm to 2000ppm in 50 ppm steps. Alarm Relay You can drive the alarm relay as a normally energised or as Logic a normally de-energised (failsafe) relay.
  • Page 15 2 = Force fresh air. 3= Remote mute. 4 = Simulate Smart Temp sensor output. 5= report status to Mobus/BACnet. 6=Outside Air Sensor. 7= Pause all alarms (Unoccupied). Active The SMT-IAQ3 active ventilation function uses the inside Ventilation and outside (if fitted) air temperature sensors to determine Outside Air if outside air is suitable to be used to ventilate the room.
  • Page 16 Default is OFF. Adjustment is OFF, then 5 deg to 100 deg in 1 deg steps. Active The SMT-IAQ3 can introduce fresh outside air into the Ventilation room when conditions are suitable. This option defines the Output output(s) that control this function.
  • Page 17 Temp Max This option permits you to select the highest temperature Value value to be used by the SMT-IAQ. Temperatures above this value will be ignored. (See Graph on page 5). Default is 5 deg. Adjustments are -20 to 150 in 1-degree steps.
  • Page 18 RH Max This option permits you to select the highest RH value to be Value used by the SMT-IAQ. RH above this value will be ignored. (See Graph on page 6). Default is 100%. Adjustments are 0-100% on 5% steps. RH Low Voltage This sets the RH 0-10V output minimum voltage when at the minimum RH value (see Graph on page 6).
  • Page 19 Default is 10v. Adjustments are 0-10V in 0.5V steps CO2 Safety This sets a constant voltage to the CO2 0-10V output. Voltage This voltage will be present whenever the SMT-IAQ3 is powered (see Graph on page 5). Default is 0v. Adjustments are 0-10V in 0.5V steps. Back light...
  • Page 20 Amber Temp This option sets the threshold of where the backlight turns Backlight from green to amber for temperature. Threshold Default is OFF. Adjustment from Off, then 0 to 100 deg in 1 deg steps. Red Temp This option sets the threshold of where the backlight turns Backlight from amber to red for high temperature.
  • Page 21 Default is 850pp. Adjustment from Off, then 0 to 2000 ppm in 50ppm steps. Communication The SMT-IAQ3 has an isolated RS-485 communications protocol capability. You can select ModBus RTU or BACnet MSTP communications protocol. The full stop in the temperature display will flash if communications is running.
  • Page 22 Typical wiring examples We have provided several wiring examples that may assist in setting up the SMT-IAQ3 in your application. These are not the limit of the SMT-IAQ capability. These wiring examples shown require you to adjust the various options in the installer menu.
  • Page 23 Variable Speed Drive or a modulating damper the wiring and setup are the same. Should you wish you are free to mix the devices you wish to control with the three SMT-IAQ3 0-01V outputs. All three outputs can be individually scaled. Page 23...
  • Page 24 SMT-IAQ3 sensors. (30V @ 1A max). Active Ventilation Function. By fitting an outside air sensor, the SMT-IAQ3 can bring in fresh air to improve the room air quality if the outside air temperature is suitable. To use this function, you must first...
  • Page 25 If selected in the active ventilation options menu, The SMT-IAQ3 will modulate the temperature 0-10V output so that the output is at the maximum voltage set when the room temperature is 1 degree above the inside temperature setpoint. If introducing outside air the icon “A”...
  • Page 26 The advanced ventilation option is independent of the alarm and functions of the SMT-IAQ3. This function will not sound any audible alarm or impact the LCD colour. The letter “A” will simply flash in the lower right corner of the LCD to show the function is running.
  • Page 27 Page 27...
  • Page 28 The SMT-IAQ3 can become part of a complete HVAC control system and woks perfectly well with Smart Temp controls such as the SMT-920 “Viking” control. The diagram provided shows a Viking controlling a 3 stage Heat pump unit (with capacity control), full economy cycle with CO2 fresh air override.

  • Page 29: Specifications

    Specifications Power 12 to 30V AC or DC Relay Output 30V AC/DC @ 1A Max Touch Method “XY” Resistive Back Light Multicolour LED (Green, Red, Amber) Back Light Life 40,000 Hours to Half Intensity Operating Temperature -5°C To 50°C Operating Rh 0 To 95% (Non-Condensing) 0-10V Outputs 5ma Max...