Description
The Heatcraft Refrigeration 21340301 Defrost Timer is a control component used to regulate automatic defrost in HVAC systems. It can be rated at 40 A at 208/240 V/50 Hz and programmed to alternate power to heaters or reversing valves at a time interval to strip frost off the evaporator coils. It is fitted in commercial refrigeration units and heat pump systems and is linked with temperature sensors and the system controller to start and end defrost events. It plays the role of ensuring that the heat exchange and airflow remain efficient operations.
