Learn about why evaporator freezing and liquid slugging occur, and why you need the APR Control to prevent these issues from occurring!
Rawal Devices’ Senior Technical Engineer, Jason Santos, helps you understand the common contributing factors of evaporator freezing and liquid floodback, leading to compressor failure.
During part-load or non-design day conditions with lower airflow, you’re going to have less total heat content across the evaporator coil compared to the compressor capacity. If the evaporator coil temperature (SST – Saturated Suction Temperature) drops below freezing, all the moisture on the coil begins to freeze - and ice will form.
This is key to understand because having enough heat content in the air entering the evaporator is critical to prevent evaporator freezing or liquid flood back/slugging.
Second to electrical issues, Flood back or liquid slugging is the next leading cause for compressor failure.
Flood back or Slugging can happen when there is a mechanical failure such as a bad TXV, broken fan, inadequate airflow, failed dampers or even a plugged filter dryer. More commonly caused by not enough heat content in the air to evaporate the liquid refrigerant into a low pressure, low temperature suction gas.
The APR Control prevents evaporator coil freezing and liquid floodback by maintaining the SST setpoint above freezing, also diverting the refrigerant gas back into the suction line so that liquid refrigerant never reaches the compressor.
Give us a call today and we can discuss if the APR Control is the correct solution for your job!
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Learn more about preventing evaporator coil freezing or liquid slugging/floodback with the APR Control: [ Ссылка ]
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00:00 Understanding Evaporator Coil Freezing/Icing
01:09 How the APR Control Prevents Evaporator Coil Freezing/Icing
01:37 Understanding Liquid Floodback
02:20 How the APR Control Prevents Liquid Floodback
#EvaporatorFreezing #LiquidSlugging #EvaporatorCoilFrost #DXAirConditioning #RawalDevices #APRValve #APRControl #RawalValve #Dehumidification #CapacityControl #HotGasBypass #CompressorCapacityControl
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