What could happen if a technician does not purge their gauges before connecting them to a condenser unit?

Purging gauges before connecting them to a condenser unit is essential because failing to do so can allow air and non-condensables to enter the refrigeration system. When gauges are not purged, the lines may contain residual air, moisture, or other gases that could mix with the refrigerant.

Air and non-condensables are detrimental to system performance because they can lead to reduced efficiency and may cause the system to operate at improper pressures. This can result in a variety of issues, including poor heat transfer and potential damage to the compressor. By purging the gauges, the technician ensures that only the refrigerant is in the lines, which helps maintain system integrity and accurate readings.

Ensuring that the gauges are properly purged contributes to the reliability and efficiency of the refrigeration system, allowing for correct diagnostics and maintenance to be performed.