What should technicians monitor to avoid system inefficiencies caused by non-condensables?

Monitoring pressure levels is essential for HVAC technicians to avoid system inefficiencies caused by non-condensables. Non-condensables, such as air or other gases, can interfere with the condensation process in refrigerant systems, leading to increased pressure in the system. This can result in reduced efficiency, as the compressor must work harder to achieve the required pressures for effective cooling or heating. By keeping an eye on pressure levels, technicians can identify potential problems caused by the presence of non-condensables and take corrective actions, such as purging the system or checking for leaks, thereby maintaining optimal system performance and efficiency.

Humidity levels, electrical consumption, and airflow rates, while important factors in HVAC system operation, do not directly indicate the presence of non-condensables. Monitoring these aspects is essential for different reasons, such as ensuring comfort, tracking energy use, or assessing airflow effectiveness, but they do not specifically address the issues created by the presence of non-condensable gases in the refrigerant circuit.