What does it mean if the sight glass indicator is yellow

It is the standard service part for unit sizes 03-15

Direct OEM Compatibility: Serves as the official successor to legacy part number 308118-402 for a seamless fit

motorized dampers

Featuring a 14-inch diameter and a 45-degree pitch

Setra 2641R25WB11T1C Pressure Transducer Els PW 17895 What does it mean ifThe Setra 2641R25WB11T1C is a industry standard low differential pressure transducer designed for precise monitoring in high stakes HVAC environments. Built with an all stainless steel micro tig welded capacitive sensing element, this unit delivers 1% FS accuracy and superior long term stability without the drift common in lower grade sensors. It features a bidirectional pressure range of 0. 25" WC, making it an essential component for tracking air