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

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

Common Questions: Can I use an S1-KTKR15 in place of a standard KTK-15

this motor maximizes energy efficiency while maintaining quiet operation during peak demand periods

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