If, while troubleshooting an R-22 residential air conditioning system at near design conditions, the operating pressures are found to be 40 psig on the low side and 116 psig on the high side, it is most likely that the system is
A) overcharged
B) operating with a dirty condenser
C) undercharged
D) operating properly

Question

Quizplus · Accepted Answer

The operating pressures of 40 psig on the low side and 116 psig on the high side indicate that the system is undercharged. At near design conditions, the operating pressures should be around 68-72 psig on the low side and 250-260 psig on the high side. Overcharging or a dirty condenser would result in higher pressures on both sides of the system.

If, While Troubleshooting an R-22 Residential Air Conditioning System at near Design