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HVAC Limit Switch
These firestat HVAC 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 firestat HVAC limit switch features a helix bimetal element that senses rapid increases in duct temperature, such as those caused by fire. The limit switch operates an SPST switch that opens with a rise in temperature. A manual reset button reactivates the limit switch after the high-temperature condition has cleared. These HVAC limits are indispensable in specialized HVAC applications and Building Automation Systems.
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