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Engine_2014 : Electricity - 184/2299
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An air-cooled refrigerated container unit using R-134a as a refrigerant has a box temperature setpoint of 32 °F, but it is currently operating with a stable supply air temperature of 35 °F. The fresh air makeup vent is closed, the unit is operating at 460 VAC/60 Hz, and the unit is in full capacity cool (modulating valve 100% open). Using the illustrated troubleshooting guide, what would be the normal range of expected discharge pressures if the ambient air temperature is 90 °F?
A) 150-190 psig
B) 160-180 psig
C) 190-230 psig
D) 200-220 psig
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