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When performing a pressure test on the filter drier, what should be the maximum pressure (psig) drop?

a) 2 psig
b) 5 psig
c) 10 psig
d) 15 psig

Answer :

Final answer:

The maximum acceptable pressure drop across a filter drier in HVAC systems is 2 psig, which ensures efficient system performance and prevents potential operational issues.

Explanation:

When conducting a pressure test on a filter drier, it's critical to ensure that the device maintains system integrity under operational pressures. According to general HVAC (Heating, Ventilation, and Air Conditioning) maintenance practices, the maximum acceptable pressure drop across a filter drier should be minimal to ensure efficient system performance.

The consensus among HVAC professionals is that a pressure drop should not exceed 2 psig (pounds per square inch gauge). This value represents the choice 'a) 2 psig' among the given options. Anything above this could indicate an issue, such as a partially blocked drier, which could reduce system efficiency or indicate the presence of contaminants. Regularly monitoring and maintaining the pressure drop within this threshold ensures the system operates effectively and extends the lifespan of the HVAC components.

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