Engine : Expired / Refrigeration AC - 286/252
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| An air-cooled refrigerated container unit using R-134a as a refrigerant has a box temperature set point of -15 °F, but it is currently operating with a stable return air temperature of 0 °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? GS-RA-52 |
| A) 190-230 psig |
| B) 200-220 psig |
| C) 160-180 psig |
| D) 150-190 psig |
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