These Firestat/High Limits are installed in air ducts to shut down heating, air conditioning and ventilation equipment when air temperature in duct exceeds a pre-set limit.
The Models TC-108, TC-105 and TC-100 Duct High Temperature Limits 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. These Firestat models are field adjustable with a temperature range of 100°-250°F. The Models TC-205 Duct High Temperature Limits are Fixed Temp with a 5″ insertion element.
Enclosure ambient temperature is -40°F to 190°F. Element ambient max 350°F
| Part Number | Description | Range | Factory Set | Switch Action |
|---|---|---|---|---|
| TC1001A3C | Manual Rest, Adjustable Temperature w/ 11″ Element | 100°-250°F | 125°F | Open on Rise |
| TC1081A3C | Manual Rest, Adjustable Temperature w/ 7.5″ Element | 100°-250°F | 125°F | Open on Rise |
| TC1051A3C | Manual Rest, Adjustable Temperature w/ 5″ Element | 100°-250°F | 125°F | Open on Rise |
| TC2051A1253C18 (4PU53) | Manual Rest, Fixed Temperature 5″ Element | 125°F | 125°F | Open on Rise |
| TC2051A1653C18 (4PU54) | Manual Rest, Fixed Temperature 5″ Element | 165°F | 165°F | Open on Rise |
| TC2051A2003C18 (4PU55) | Manual Rest, Fixed Temperature 5″ Element | 200°F | 200°F | Open on Rise |