ensure the flange bolts are tightened in a secondary pattern to approximately 300 lb-in (34 Nm) to ensure a leak-free seal on the gaskets

The black polyethylene finish provides superior UV resistance

While it is an SPST open on pressure drop switch

Enhanced Safety Logic: Reliable SPST switching prevents ignition if the draft inducer or venting system is obstructed

Trane WHL1278 Wheel Els PW 17895 ensure the flange bolts areWhen you're dealing with a vibration issue or a complete airflow failure in a Trane air handler, the Trane WHL1278 is the exact OEM replacement blower wheel you need to restore system balance. This is a heavy duty centrifugal fan wheel featuring a 6 1 2" diameter and a 7 5 8" width, specifically engineered for clockwise (CW) rotation. The hub is machined for a standard 1 2 inch bore, ensuring a precise fit on the motor shaft to prevent the "walking"