CAMT Practice Exam – Complete Prep Guide

Question: 1 / 400

When charging an air conditioning system, what differs between R-22 and R-410A?

R-410A is charged only as a gas

R-22 requires a vacuum before charging

R-410A must leave the jug as a liquid

When charging an air conditioning system, R-410A must be charged in a specific manner due to its properties and pressure requirements. R-410A operates at a higher pressure than R-22. To ensure proper system performance and efficiency, R-410A must leave the container as a liquid. By charging R-410A in its liquid state, you allow the system to achieve the necessary pressures and ensure that the refrigerant effectively circulates through the system, thereby enhancing its cooling capabilities.

In contrast, R-22 can be charged in multiple ways, but R-410A's unique characteristics necessitate that it be introduced into the system as a liquid. This practice aids in proper mixing and vaporization of the refrigerant as it enters the compressor, thus optimizing system operation. Understanding these distinctions is crucial for technicians when dealing with different refrigerants to ensure compliance with safety standards and maintain the efficiency of HVAC systems.

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R-22 should always use a manifold gauge

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