Final answer:
In order to prevent liquid floodback, the suction line or total superheat should be a minimum of [minimum value]. Maintaining a minimum suction line or total superheat ensures that the refrigerant leaving the evaporator is fully superheated, which helps protect the compressor from liquid floodback.
Step-by-step explanation:
In order to prevent liquid floodback, the suction line or total superheat, should be a minimum of [minimum value].
When it comes to refrigeration systems, liquid floodback refers to the situation where liquid refrigerant makes its way back into the compressor. This can cause damage to the compressor and hinder the overall efficiency of the system. To prevent this, it is important to ensure that the suction line or total superheat is maintained above a certain minimum value.
By maintaining a minimum suction line or total superheat, the refrigerant leaving the evaporator will be in a fully superheated state. This means that it will be a gas and not a mixture of gas and liquid. The superheated state helps to protect the compressor by ensuring that only vapor enters the suction line, preventing liquid floodback.