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How can a technician determine when a filter drier is stopped up and needs changing?

A. A pressure drop of 0.5 psig.
B. A pressure drop of 2 psig.
C. A pressure drop of 5 psig.
D. A pressure drop of 10 psig.

Answer :

Final answer:

A pressure drop of 2 psig is an indication that a filter drier is stopped up and needs changing.

Explanation:

The correct answer is B) A pressure drop of 2 psig.

A filter drier is a component used in refrigeration systems to remove moisture and contaminants from the refrigerant. Over time, the filter drier can become clogged with debris, reducing its effectiveness. When a filter drier is stopped up, there will be a pressure drop across it. This means that the pressure on the incoming side of the filter drier will be higher than the pressure on the outgoing side.

A pressure drop of 2 psig is typically considered an indication that the filter drier needs to be changed. This drop in pressure indicates that there is a significant restriction in the flow of refrigerant, which can impact the performance and efficiency of the system. It is important to regularly inspect and replace filter driers to ensure the smooth operation of refrigeration systems.

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