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When charging a chilled water system with R404A, what is the minimum pressure we must allow the system to be charged to before adding liquid refrigerant?

A. 78.6 psig
B. 72.2 psig
C. 77.1 psig
D. 69.3 psig

Answer :

Final answer:

The minimum pressure to charge a chilled water system with R404A is 69.3 psig.


Explanation:

When charging a chilled water system with R404A, the minimum pressure that should be allowed before adding liquid refrigerant is 69.3 psig.


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