CONNEX™ Smart Thermostat CST-240 7215100100 R00
Table of Contents Welcome............................................................................. 3 Features............................................................................. 4 Specifications..................................................................... 4 Selecting the Heater Type.................................................. 5 Installation.......................................................................... 6 Control Panel (User Interface)....................................
Welcome Thank you for choosing to purchase a CONNEX™ Smart Thermostat from Dimplex. The CST-240 is an easy to install and easy to use unit that works with any convection or fan forced heater. It provides precise temperature control and will lower your energy costs by up to 10% versus a mechanical thermostat. Please carefully read and save these instructions.
FCC Compliance CAUTION: This unit has been tested and found to comply with the limits for Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
Features The CONNEX™ Smart Thermostat CST-240 works with all new and existing electric heaters without built-in thermostats. It works with new and old heaters, either fan-forced or convection. The CST-240 changes your heater into a smart heater. It makes any heater work with optional CONNEX™ controllers to provide wireless and WIFI connectivity. Specifications Dimensions: 4-4/8” W x 5-1/8” H x 1-1/2” D (11.7cm W x 13.0cm H x 3.6cm D) Weight: 0.5lb (0.
Convection For this type of heater, the CST-240 will control convectors to within 0.5°C (1°F) by operating the heaters every minute. It is not recommended to operate fan forced heaters in this mode due to additional stress placed on the fan motor. To change the type of heater Convection: 1. Press sequence , , +, − HOME/AWAY, SYNC, +, − 2. Checkmark () icon and CO displays.
CAUTION: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible electric shock or fire hazard and will void the warranty. WARNING: The installation of the thermostat must comply with the applicable Local and/or National Electrical Codes and utility requirements. Entrust the installation to duly qualified personnel where required by law.
The CST-240 mounts directly into a standard 2 x 4 inch vertical electrical outlet box. 1. Disconnect power supply to prevent electrical shock or product damage. 2. Run line voltage wiring to the thermostat location. 3. Remove the thermostat cover. 4. Connect the black LINE lead on the thermostat to the L1 line from the power supply panel. 5. Connect the red LOAD lead from the thermostat to the line lead on the heater. 6.
7. Secure the ground wire to the ground screw in the outlet box. 8. Make sure all electrical connections are tight. 9. Insert wires and connectors into the outlet box taking care not to damage the sensing device or wiring. 10. Mount the thermostat base into the wall box and secure using the two supplied screws. Note: Do not over tighten mounting screws. 11. Replace thermostat cover. Control Panel (User Interface) The CONNEX™ Smart Thermostat CST-240 has a user-friendly, easy-to-use interface.
The LCD is backlite whenever a button is pressed. The backlight shuts off after 10 seconds. During regular operation, the LCD displays the ambient room temperature. LCD screen decrease temperature button increase temperature button home/away button CST-240 synchronization button 10 www.dimplex.
LCD Screen The large digits (e.g., 25.5) display the room temperature in ºC or ºF to within 0.º5C (1ºF). It will display Lo if the temperature drops below 0ºC (32ºF), and Hi if the temperature rises above 36ºC (97ºF). The small digits (e.g., 100%) display the room’s relative humidity. The house icon indicates the unit is in Home mode. The person exiting icon indicates the unit is in Away mode. The lock icon indicates the unit is in Lock mode and unable to be changed using the buttons.
To sync a CONNEX™ wireless controller to your CST-240 thermostat instead of a CONNEX™ heater, place your controller in sync mode and follow the below instructions Press the synchronization button for 5 seconds to enter the CST-240 into a pairing mode with a CONNEX™ wireless controller. While the unit is in sync mode, the displays for 30 seconds and it will be able to receive an RF message and update its sync information. If the unit has not successfully synced in 30 seconds, the X symbol displays.
Operation The CONNEX™ Smart Thermostat is easy to use and easy to program. Simply touch the + or − buttons to raise or lower the temperature. In addition, you can program the heater to maintain one temperature when you are at Home and a different temperature for when you are Away. Simply press the Home/Away button when entering or existing the room to switch between the preselected set points. Set the at Home Temperature 1. Make sure child lock is off (lock icon does not show on the LCD). 2.
Set the Away Temperature 1. Make sure child lock is off (lock icon does not show on the LCD). 2. Press the Away button . The Away icon and the set temperature on the LCD should illuminate. 3. Press the + or − button to increase or decrease the set temperature. Wireless Connection The CST-240 has wireless (RF) communication capability. The unit can receive wireless signals from existing CONNEX™ heating control products. See www.dimplex.
Limited Warranty All Dimplex Thermostats are warranted against defects in workmanship and materials for three years from date of sale. This warranty does not apply to damage from accident, misuse, or alteration, nor where the connected voltage is more that 5% above the nameplate voltage, nor to equipment improperly installed or wired or maintained in violation of the instruction sheet.
