Trane AY28X079 Cooling Kit 320788-703 extending the service life of

extending the service life of the blower motor and capacitor

keeping your lines clear and preventing back-up

it supports both mixing and diverting configurations depending on the port configuration

always verify the pressure differential using a digital manometer at the collector hood and transition box ports before condemning the switch

Utilizing a genuine Carrier part prevents the common issues of airflow restriction or excessive noise associated with generic universal blades

Trane AY28X079 Cooling Kit 320788-703 extending the service life ofMaintain critical head pressure and prevent evaporator freeze up with the Trane AY28X079 Low Temp Cooling Kit. This evaporator defrost control is a vital integration for commercial and industrial 4TTR6, 4TTA3, and BYC systems, enabling reliable low ambient cooling down to 30F. By cycling the compressor when the indoor coil approaches frost conditions, this condenser fan cycle control prevents oil dilution and ensures stable HVAC refrigerant pressure