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If the minimum winter design temperature in your town is 0°F, what would the low-pressure cut-in and cut-out be for a walk-in refrigerator using R-404a in an indoor condensing unit?

A. Cut-in: -10 psig, Cut-out: 10 psig
B. Cut-in: 20 psig, Cut-out: 30 psig
C. Cut-in: 30 psig, Cut-out: 40 psig
D. Cut-in: 40 psig, Cut-out: 50 psig

Answer :

Final answer:

The low-pressure cut-in and cut-out settings for a walk-in refrigerator using R-404a refrigerant in an indoor condensing unit would typically be Cut-in: 20 psig and Cut-out: 30 psig.

Explanation:

In a walk-in refrigerator using R-404a as the refrigerant, the low-pressure cut-in and cut-out settings are determined based on the minimum winter design temperature of the town. The purpose of these settings is to maintain the proper refrigeration cycle and ensure efficient operation of the refrigeration system.

The low-pressure cut-in is the pressure at which the compressor starts running to maintain the desired temperature. The low-pressure cut-out is the pressure at which the compressor stops running because the desired temperature has been reached.

For R-404a refrigerant, a common low-pressure cut-in and cut-out setting for a walk-in refrigerator in an indoor condensing unit is Cut-in: 20 psig and Cut-out: 30 psig. These settings ensure that the system operates efficiently and maintains the desired temperature in the walk-in refrigerator.

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