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HVAC Controls CO2-TH Manual

Indoor co2, temperature and humidity monitor
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CO2-TH
Thank you for your purchase of the CO2-TH CO2, Temperature and Humidity Monitor. This device
has been designed, built, and tested to be an exceptionally reliable product. Great effort has been
taken to ensure ease of use and reliable monitoring of Carbon Dioxide, temperature, and humidity
within an interior space.
Take time to read this manual carefully to understand how the product can be used and applied for
your specific application.
Great care has been taken in the preparation of this manual. However, iO HVAC Controls takes no
responsibility for errors or omissions contained in this document. It is the responsibility of the
installer to ensure that this product and any equipment connected to it operates in a safe and
efficient manner.
Due to ongoing product improvement iO HVAC Controls reserves the right to change the
Version 1.3
specifications of this product (or its components) without notice.
All rights reserved. © Specified Controls 2020 Intellectual rights apply.
Indoor CO2, Temperature and Humidity
iO HVAC Controls www.iohvaccontrols.com
Monitor
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Summary of Contents for HVAC Controls CO2-TH

  • Page 1 Take time to read this manual carefully to understand how the product can be used and applied for your specific application. Great care has been taken in the preparation of this manual. However, iO HVAC Controls takes no responsibility for errors or omissions contained in this document. It is the responsibility of the installer to ensure that this product and any equipment connected to it operates in a safe and efficient manner.

  • Page 2: Lcd Display

    LCD Display User Operation Not all display elements or buttons shown may be active. The display is dynamic and The product requires very little user interaction. It will monitor the levels of carbon dioxide, humidity and temperature within the applied space and is capable of initiating functions not applicable will not be shown.

  • Page 3: Terminal Layout

    Terminal Layout O-10V Outputs Use a small, flat bladed There are three 0-10V outputs. One each for carbon dioxide, temperature, and relative screwdriver and place humidity. All 0-10V output wiring is the same. Wire between the required output and the it in the bottom center 0V / Com terminals.
  • Page 4 Relay Power There is a single volt free relay with changeover contacts. The relay is rated to carry 30V Primary power can either be AC or DC from 12 to 30V. @1A Max. Any voltage applied to the relay common terminal will switch between the AC power is not polarity dependent however if using DC power ensure the positive normally open (NO) and normally closed (NC) terminals.

  • Page 5: Installation And Mounting

    Power Up Installation & Mounting When you first apply power, the LCD will display all elements and then display the All sensing devices are contained within the enclosure. Therefore, it is important to locate firmware version for a few seconds. During the next 180 seconds the display will it within the space to be monitored and controlled.
  • Page 6 Advanced Installer Options Menu To advance through the menu items tap the “NEXT” button and adjust the shown installer option with the Up / Down arrows. This product can be configured to meet the requirements of the specific application. Within the Advanced Installer options menu, you can adjust how the monitor will To exit the Installer menu and save changes press and hold the “NEXT”...
  • Page 7 Relay alarm relay. Show Force The SC-CO2-TH display can be set to show a “force fresh air” Default is Off. Options are Off, then 0% to +100% in 1% steps. Fresh Air button. If this button is pressed the CO2 sensor 0-10V output will...
  • Page 8 Ventilation fitted) air temperature sensors to determine if outside air is Value be used by the SC-CO2-TH. Temperatures above this value will be Low Inside Air suitable to be used to ventilate the room. ignored. (See graph on page 5)
  • Page 9 This option permits you to select the lowest RH value to be used by the SC-CO2-TH. RH below this value will be ignored. (See graph CO2 Max This option permits you to select the highest CO2 value to be used...
  • Page 10 Amber Temp This option sets the threshold of where the backlight turns from Communication The monitor has an isolated RS-485 communications capability. Backlight green to amber for temperature. Protocol You can select ModBus RTU or BACnet MSTP communications Threshold Default is Off. Options are Off, then 0 to 100 degrees in 1-degree protocol.
  • Page 11 Reset Setting this value to 1 then exiting the installer menu will In this example the CO2 and RH is factory reset the monitor. controlling the VSD with a high select. Both the CO2 and RH Typical Wiring Examples outputs are individually scalable so the CO2 range can be 450ppm to The following contains wiring examples that may be helpful in setting up the monitor for 1,000ppm and the RH range can be...
  • Page 12 An open/close or an off/on output In the Installer menu you must can be controlled by the monitor activate the Active Ventilation using the volt free relay provided. function by setting the inside and The relay threshold can be outside air temperature individually adjusted for each thresholds (page 15 explains this) sensor.

  • Page 13: Specifications

    If you would like, you can have Specifications both the temperature 0-10V output and volt free relay used for Power 12 to 30V AC or DC Relay Output 30V AC/DC @ 1A Max advanced ventilation. In the Active Touch Method “XY”...
  • Page 14 www. iohvaccontrols.com For Technical Support Call Toll Free: 866-225-5032 iO-06-1347-021522 Page 27 Page 28...

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