Trane TRR1558 Transformer 318423-701 though the 3/4" orifice is

though the 3/4" orifice is often used at lower pressures to maximize flow stability

Clockwise Shaft End Rotation (CWSE): Matches equipment requiring CWSE motor rotation

which compromises the furnace pressure switch readings and prevents the ignition sequence

For techs troubleshooting Lennox G23 series or Armstrong furnace models

What are the connection sizes for this service valve

Trane TRR1558 Transformer 318423-701 though the 3/4" orifice isExperience reliable control circuit power with the Trane TRR1558, a professional grade 75VA step down transformer engineered specifically for technical applications in commercial and residential HVACR environments. This OEM Trane transformer efficiently converts a primary input of 200 230V to a steady 24V AC secondary output, ensuring optimal performance for low voltage components such as thermostats, contactors, and integrated ignition modules. Built