Trane AY28X079 Cooling Kit 320788-703 Mechanical Compatibility: Direct cross-reference for

Mechanical Compatibility: Direct cross-reference for part numbers 86H5601

and Orange is used for 240V applications

Why is purple ink used instead of standard black

Pre-Programmed Reliability: Factory-coded for Lennox HVAC equipment

you eliminate the alignment and vibration issues often seen with universal alternatives

Trane AY28X079 Cooling Kit 320788-703 Mechanical Compatibility: Direct cross-reference forMaintain 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