In "Off" mode, the thermostat usually retains a frost protection setting. It will not allow the room to drop below 5°C (41°F). Do not manually override this by disconnecting power if the building is unoccupied during winter.
Understanding the interface is the first step to mastering the thermostat.
4.1 The Display Screen
4.2 Control Buttons
Intronics provides 1-year limited warranty against manufacturing defects. Contact your local dealer for service. intronics digital room thermostat user guide
Need help?
Check the model number on the back of your thermostat and visit www.intronics-hvac.com/support (example) or call 1-800-555-INTRO.
Power On/Off: Press the main power button to toggle the unit. The display will show your last used settings upon startup.
Adjust Temperature: Use the Up and Down arrows to set your desired comfort level. On most digital displays, the larger number is the current room temperature, while the smaller number indicates your target set-point.
Select Fan Speed: Press the fan button to cycle through Low, Medium, and High speeds. In "Off" mode, the thermostat usually retains a
Change Mode: Use the Mode button to switch between Cool, Heat, and Auto (available on certain models like the DT-08). Advanced Features & Symbols
Turbo Function: Use this for rapid cooling when you first enter a warm room.
Econo Mode: Limits energy consumption by maintaining a slightly wider temperature range.
Frost Protection: Many Intronics models automatically turn on the heat if the room drops below a preset safety value (typically around 10°C) to prevent frozen pipes. Display Symbols: Snowflake: Cooling system is active. Flame/Sun: Heating system is active. A: Auto mode is managing both heating and cooling. Installation & Troubleshooting SERIES Digital Room Thermostat II INSTALLATION MANUAL Need help
Table 2. Set up table. Example 1 : the display shows steady means the set up is now for Heat / Cool version. Change the set up. a) Sangchai Group Intronics digital room thermostat user guide
Q: Can I use my Intronics digital thermostat with a heat pump?
A: Only if the model specifically says “Heat Pump compatible” (look for O/B terminal). Standard models work only with conventional gas/oil boilers.
Q: Why does my thermostat turn on/off too frequently?
A: This is called short cycling. Increase the hysteresis (advanced setting) from 0.5°C to 1°C or 1.5°C. Refer to your specific manual for “CPH” (cycles per hour) adjustment.
Q: How do I know if my Intronics thermostat is line-voltage or low-voltage?
A: Line-voltage (120-240V) has thick red/black wires and says “max 16A.” Low-voltage (24V) has thin multi-colored wires. If unsure, consult an electrician.
Q: The backlight stays on all night. Is this normal?
A: Most models have a backlight that turns on for 10 seconds after a button press. If it stays on, you may have a “continuous backlight” setting enabled. Turn it off in advanced menu (look for “BL” or “LIGHT”).
To clear all settings and restore factory defaults: