McDonnell & Miller 61-HD Low Water Cut Off R-410A Why is air venting critical

Why is air venting critical in an F&T trap like the 15B2

Universal Connectivity: Includes an integrated 36-inch capillary with a standard 1/4 inch flare nut for direct attachment to high-side service ports

while using it for a higher-rated unit will lead to premature failure

and 9 for hazardous or washdown locations

and Armstrong R41093-001

McDonnell & Miller 61-HD Low Water Cut Off R-410A Why is air venting criticalThe McDonnell & Miller 61 HD (Part Number 140300) is a heavy duty mechanical low water cut off designed specifically for low pressure steam boiler applications. This head mechanism serves as a direct replacement component for Series 61 controllers, facilitating reliable burner circuit interruption when water levels drop below the safe line. Rated for a maximum steam pressure of 20 PSI, the 61 HD utilizes a high buoyancy float operated mechanism to