Trane AY28X079 Cooling Kit 320074-702 making it suitable for both

making it suitable for both straight-cool and heat pump applications where bi-flow metering is necessary

simplifying the swap-out process for service contractors

field disassembly is not recommended to maintain system safety and accuracy

When performing seasonal maintenance on Reznor gas-fired equipment

when equipped with a factory-approved vent limiting device

Trane AY28X079 Cooling Kit 320074-702 making it suitable for bothMaintain 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