Final answer:
Inputs to the Trane defrost control on a heat pump system generally include temperature and pressure sensors to monitor conditions and prevent the evaporator from freezing.
Step-by-step explanation:
When discussing the inputs to the Trane defrost control in a heat pump system, it generally refers to sensing devices that trigger the defrost cycle.
These inputs typically come from different sensors including temperature sensors and pressure sensors that monitor the conditions of the heat pump.
In a basic heat pump system, consisting of a condenser, an expansion valve, an evaporator, and a compressor, the defrost control ensures that the evaporator does not freeze in cold conditions by reversing the cycle temporarily to melt accumulated frost.
Exact inputs can vary depending on the specific model of the Trane heat pump, but they are essential for efficient operation in cold weather conditions to transfer heat effectively.