Lennox 21Z11 Smoke Detector kit 326070-701 this switch is designed to

this switch is designed to handle the standard voltages found in HVAC control strings

Precise Flow Regulation: Integrated flow control allows for manual adjustment of water intake to match system PSI

and MC-521x series gear train actuators

This switch is calibrated for a 15 PSI cutout (falling) and a 40 PSI cut-in (rising) pressure differential

Optimized Performance: Efficient 35

Lennox 21Z11 Smoke Detector kit 326070-701 this switch is designed toThe Lennox 21Z11 is a professional grade duct smoke detector kit engineered for seamless integration with commercial and light commercial air handling units. This HVAC smoke detection kit is critical for life safety compliance, providing rapid identification of combustion particulates within the supply or return air streams. Designed specifically for Lennox equipment, the 21Z11 interfaces directly with HVAC safety circuits and system control boards to