What is the name of the line that connects the condenser to the metering device?

The line that connects the condenser to the metering device is referred to as the liquid line. This line is responsible for transporting the liquid refrigerant from the condenser, where it has released heat and changed from a gas to a condensed liquid state, to the metering device. The metering device regulates the flow of refrigerant into the evaporator, where it will absorb heat and change back into a gas.

Understanding this function is key in the refrigeration cycle. The liquid line is critical because it ensures the proper flow and pressure of refrigerant necessary for the system to operate efficiently. Consequently, any issue in the liquid line can lead to performance problems in the entire HVAC system.

In contrast, the other options pertain to different functions: the discharge line carries high-pressure gas from the compressor to the condenser, the suction line transports low-pressure gas back to the compressor from the evaporator, and the return line is not a standard term used in describing refrigerant lines in this context.