By replacing the internal vacuum breaker parts

This model is specifically designed for R410A refrigerant only

a heavy-duty combination low water cut-off and pump controller designed for industrial and commercial steam boilers

each carries unique programming specific to the motor horsepower and unit tonnage

allowing for precise airflow adjustment across various ducting configurations

Trane RLY1388 Relay 319852-301 By replacing the internal vacuumThe Trane RLY1388 Relay is an authentic OEM double pole, double throw (DPDT) control component engineered for precise switching in residential and commercial HVAC applications. This RLY01388 switching relay features a 24V AC coil designed for standard low voltage control circuits, providing reliable actuation for blowers, compressors, and auxiliary heating elements. Built to handle demanding line voltage loads, its contacts are rated for 120 600V at