What pressure does the Low Side pressure go to on a R-410A Manifold Gauge?

The correct answer reflects the operational characteristics of R-410A systems, particularly the low side pressure readings that can be expected during normal operation. In R-410A systems, a low side pressure of 250 psig is typical during cooling operation at optimal conditions.

Understanding the function of a manifold gauge is crucial here. The manifold gauge helps technicians determine the refrigerant pressures, which is key for assessing system performance and diagnosing issues. In practice, during the performance analysis of an R-410A system, the low side pressure not only indicates the amount of refrigerant that is in the evaporator but also influences cooling efficiency.

The retard values outlined for the other options do not align with the widely accepted pressure ranges for R-410A in typical HVAC operation, as they suggest either lower or significantly higher pressures than what is expected, which can lead to confusion and potential misdiagnosis when charging or servicing the system. Thus, the chosen answer accurately reflects the appropriate low side pressure reading for R-410A applications.