In such cases, the system is designed to operate continuously and hot gas bypass neutralizes the refrigeration effect. For comfort cooling, however, the addition of hot gas bypass is seldom necessary. Additionally, hot gas bypass is used when the evaporator coil is designed for comfort cooling (latent and sensible loads) versus precision. The bypass valves are factory adjusted to a setting of psig (35°F evaporator temperature). It is more efficient because it eliminates the need for a separate heat source to dehumidify the air, reducing heating costs.
It turns off compressors when the coil frosting is sensed.
One of the Fundamental Series. Trane believes that it is incumbent on manufacturers to serve the industry by. Using a hot gas bypass valve can also prevent short cycling of a compressor and prevent evaporator freezing in low load conditions. I heard that Trane was going to start to use a Froststat (snap-acting contact type pipe sensor) instead of HGBP last year. The greatest care should be taken provides a relay contact needed not supplied by Trane , is installed when cutting through passages to initiate hot gas bypass on the inside the electric panel.