it refers to the switch contacts closing when the negative pressure (vacuum) reaches the 1

The assembly is designed for use with existing factory mounting points

it is compatible with natural gas and LP gas (liquid propane)

Designed for multi-speed versatility

The Emerson Alco 064267 (Model 200RB7T5M) is a heavy-duty

Carrier 310222-752 Cell Panel Kit 322056-301 it refers to the switchThe Carrier 310222 752 Cell Panel Kit is a vital OEM furnace replacement part designed for specific high efficiency condensing gas furnaces. As a Factory Authorized Part, this primary cell inlet panel is engineered to the exact tolerances of the original equipment, ensuring a precise fit within the heat exchanger assembly. This kit is critical for maintaining the structural integrity of the combustion chamber and ensuring proper airflow across the