The method to charge a system that has a normal charge of 80 pounds is to charge with what through the liquid-line service valve?

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Multiple Choice

The method to charge a system that has a normal charge of 80 pounds is to charge with what through the liquid-line service valve?

When charging a system, introduce the refrigerant as a liquid through the liquid-line service valve. This delivers liquid refrigerant into the high‑pressure side so it can subcool and then evaporate in the evaporator, which gives a stable, accurate fill and avoids the flash gas that would occur if gas were introduced first. Charging as vapor through the suction-line service valve would bring in gas at low pressure, leading to unreliable readings and the risk of an improper charge. Therefore, liquid through the liquid-line service valve is the best method.

When charging a system, introduce the refrigerant as a liquid through the liquid-line service valve. This delivers liquid refrigerant into the high‑pressure side so it can subcool and then evaporate in the evaporator, which gives a stable, accurate fill and avoids the flash gas that would occur if gas were introduced first. Charging as vapor through the suction-line service valve would bring in gas at low pressure, leading to unreliable readings and the risk of an improper charge. Therefore, liquid through the liquid-line service valve is the best method.

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