🔍 Key Concepts

• Function and purpose of an oil separator in a refrigeration/compressor system • Normal flow path of refrigerant gas from compressor to condenser • Where in the system oil tends to travel with high‑velocity discharge gas

💭 Think About

• Think about when oil leaves the compressor: does it travel with low‑pressure suction gas, high‑pressure discharge gas, liquid refrigerant, or in a bypass? • At what point in the cycle do you most want to remove oil from the refrigerant so it can return to the compressor crankcase? • Which line will have hot, high‑pressure refrigerant gas coming directly from the compressor outlet?

✅ Before You Answer

• Identify which line carries hot, high‑pressure gas directly from the compressor. • Eliminate any line that normally carries subcooled liquid refrigerant rather than gas. • Consider that the oil separator must be placed where oil is still mixed with the gas, before it condenses.