How does the APR Control help prevent liquid slugging or compressor floodback?

Liquid slugging can result in damage to the compressor! The APR Control prevents or eliminates liquid slugging or compressor floodback from occurring by varies the cooling capacity of the evaporator coil by modulating refrigerant flow. During low load or non-design day conditions, when floodback or slugging is likely to occur, the APR Control will only allow enough refrigerant into the coil that can be fully evaporated.

During mechanical failures, like a broken TXV or loose fan belt, the APR Control diverts vapor into the suction line so that liquid refrigerant never reaches the compressor!