the A28GJ-33 features an adjustable differential between stages

While primarily designed for steam to dissipate heat

significantly reducing acoustic noise and extending the service life of internal components

draining may not be necessary

Carrier 32GB660017 O-Ring Kit R-22 the A28GJ-33 features an adjustableThe Carrier 32GB660017 O Ring Kit is a critical service component designed for high pressure sealing within Electronic Expansion Valves (EXV). This OEM Carrier replacement part ensures a leak free interface between the valve body and the refrigerant lines, preventing efficiency loss and potential system shutdowns. Optimized for commercial chillers and large scale condensing units, the kit is compatible with various series including 30GB, 30GN, 30GX,