The Trane BRG0646 is a heavy-duty

Overpressure Protection: Built-in IRV eliminates the need for external relief valves in most standard residential configurations

Technicians often observe high superheat

Rugged Aluminum Casting: Industrial-grade housing resists environmental corrosion and operational heat cycles

Simplified Installation: Standard 3-wire or 4-wire hardwired setup fits existing wall-mount footprints (4

Johnson Controls P72AA-18 Pressure Control Els PW 29614 The Trane BRG0646 is aDual Pressure Control, DPST Switch Only, 3 4" Conduit Opening, 12" to 50 Psi, Nema 1 Enclosure, No Adjustment Knob, Amoonia Use P72AA 18 is identical to P72AA 18C