Which of the following is true about non-condensables?

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Multiple Choice

Which of the following is true about non-condensables?

Non-condensables are gases that do not condense in the condenser (like air or nitrogen) and they linger in the system. Their presence interferes with heat transfer and raises high-side pressures, which makes pressure readings less reliable. Because the gauges can show abnormal pressures or subcooling/superheat values when non-condensables are present, the refrigerant charge calculations and overall performance can be distorted. They are not something you want or need in the system, and they can be present in recovered refrigerants, so you must remove them for accurate measurements and proper operation. That’s why the statement that they can affect pressure readings is true.

Non-condensables are gases that do not condense in the condenser (like air or nitrogen) and they linger in the system. Their presence interferes with heat transfer and raises high-side pressures, which makes pressure readings less reliable. Because the gauges can show abnormal pressures or subcooling/superheat values when non-condensables are present, the refrigerant charge calculations and overall performance can be distorted. They are not something you want or need in the system, and they can be present in recovered refrigerants, so you must remove them for accurate measurements and proper operation. That’s why the statement that they can affect pressure readings is true.

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