Which two refrigerant lines are found in a split system air conditioner?

In a split system air conditioner, the two refrigerant lines integral to the system's functioning are the suction line and the liquid line.

The suction line is responsible for carrying the low-pressure vapor refrigerant from the evaporator coil back to the compressor. This line is typically insulated to prevent heat gain, which could cause the refrigerant to evaporate prematurely and reduce system efficiency.

On the other hand, the liquid line transports the high-pressure liquid refrigerant from the condenser to the expansion device or evaporator coil. This line remains under high pressure and is vital for ensuring that the refrigerant reaches the evaporator in its liquid state, where it can absorb heat and facilitate the cooling process.

Understanding the distinct roles of these two lines helps clarify the refrigeration cycle, as each serves a separate yet critical function in heat exchange, compression, and circulation within the HVAC system. The other options include terms that are either not specific to the refrigeration process in split systems or refer to components outside the primary refrigerant lines.