A thermocouple generally powers the safety magnet in the valve to keep the pilot lit

Smith and Lochinvar technical assemblies

Installing a blade with a different pitch than the specified 38 degrees can lead to motor overloading or insufficient airflow

and Marley Engineered Products electric heating installations

42" air pressure switch (1

Lennox 97J69 Pressure Switch 328140-751 A thermocouple generally powers theThe Lennox 97J69 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor induction blower performance and flue venting integrated within the combustion circuit. This SPST (Single Pole Single Throw) vacuum switch is factory calibrated to a . 85" WC (Water Column) set point, ensuring the system only initiates the ignition sequence when proper static pressure is established. Featuring a standard 1 4" barb