Carrier 48TM660005 Manifold Kit 30067439-890 The 339800 is the arm

The 339800 is the arm assembly only

as it stabilizes the crankcase oil pressure differential

Using it with liquid propane can lead to improper combustion and hazardous operation

The S1-6806-3351 is an auto-reset limit switch

provides a reliable seal and precise blow-down performance

Carrier 48TM660005 Manifold Kit 30067439-890 The 339800 is the armThe Carrier 48TM660005 Manifold Kit is a critical OEM replacement part designed for high performance gas heating sections in commercial rooftop units. As a technical essential for maintaining proper combustion manifold pressure, this kit features a 27 inch metal manifold (48TM405276) paired with a 15 3 4 inch burner support (48TM505275). It is engineered specifically for Carrier, Bryant, and Payne models, including the 48TCDA, 48HCDD, and 48HCEA