Firestat Duct Fan/Limit Controls
These firestat duct fan and limit switches are installed in air ducts to shut down heating, air conditioning and ventilation equipment when air temperature exceeds a pre-set limit.
The Duct High Temperature Switches feature a helix bimetal element that senses rapid increases in duct temperature, such as those caused by fire. The high temperature limit then operates an SPST switch that opens with a rise in temperature. A manual reset button reactivates the temperature limit after the high-temperature condition has cleared. These duct high temperature limits are indispensable in specialized HVAC applications and Building Automation Systems.
Firestat models TC-100, TC-105, TC-108 are field adjustable with a temperature range of 100°-250°F… (read more)
The Models TC-205 Duct High Temperature Limits are Fixed Temp with a 5″ insertion element… (read more)
Senasys is currently working on the R&D for other duct control possibilities. Such as close on temperature rise, duct fan control, and a DPDT switch, which will open and close two sets of contacts, operating as a duct fan and limit control.