Lennox 14A45 Pressure Switch 328140-751 This unit is designed to

This unit is designed to accept a 0-10VDC control signal from a thermostat or DDC controller to vary the motor speed proportionally

always verify your model number against the heater's rating plate

which permits easy actuator replacement without breaking the line

Secure Connection: Features an 11/32-32 threaded nut for a gas-tight

the SPDT alarm relay can be wired into the break-on-rise circuit of a contactor or the digital input of a controller to facilitate automatic system shutdown upon moisture detection

Lennox 14A45 Pressure Switch 328140-751 This unit is designed toThe Lennox 14A45 Pressure Switch is a high precision, two stage OEM furnace replacement designed to ensure safe ignition and optimal inducer airflow. This dual pressure switch is factory calibrated with specific set points of . 50" and . 90" WC, acting as a critical safety limit that confirms the draft inducer is pulling sufficient vacuum before allowing the gas valve to open. As a direct replacement for the legacy Lennox 103613 03 and UniControl