the 7000BMVR series is field-convertible

This switch is calibrated to close the circuit at 257 PSI and open it at 126 PSI

and normally closed (NC) terminals to ensure the circuit closes upon a temperature rise for cooling stages

or the burner failing to ignite due to the control circuit not closing

Lennox 56W21 Limit Switch 318820-201 the 7000BMVR series is field-convertibleThe Lennox 56W21 Limit Switch is a critical safety component designed for precise thermal monitoring in high efficiency furnaces and air handlers. This L160 30F limit switch is engineered to open the electrical circuit at 160F on a temperature rise and feature an automatic reset once the plenum cools to 130F. As a veteran grade HVAC replacement part, it is a direct match for the Lennox 46105 002 and is compatible with a wide array of Allied Air brands