this 2-wire zone damper is compatible with most 24V AC standard zoning panels

this Lennox replacement part offers a reliable solution to ensure HVAC system compatibility and long-term diagnostic accuracy

To ensure the trap shuts correctly

allowing technicians to fine-tune system cycles for peak efficiency and preventing rapid short-cycling

NEMA 4X Protection: Includes a watertight and corrosion-resistant conduit enclosure for harsh environments

Johnson Controls P74AB-1 Pressure Control R-410A this 2-wire zone damper isJohnson Controls P74AB 1 Differential Pressure Control, SPST, Open on Pressure Increase, 8 Psi to 70 Psi, Manual Reset, Ammonia Use P74AB 1 is identical to P74AB 1C