Under normal conditions ammonia refrigerant...

🔍 Key Concepts

• Vapor-compression cycle flow path: compressor → discharge (hot gas) → condenser → liquid line → expansion device → evaporator → suction line → compressor • How ammonia refrigerant normally enters the system during charging (vapor vs liquid) • Effect of charging point on risk of liquid slugging the compressor or over-pressurizing components

💭 Think About

• Trace the normal direction of refrigerant flow and ask yourself: at which service connection would added refrigerant be carried safely through the rest of the system without immediately hitting the compressor as a liquid? • Think about whether, under normal conditions, ammonia is usually charged as a vapor or a liquid, and where that state would be safest to introduce. • Which connection would give the refrigerant time and space to boil off or mix before reaching sensitive components like the compressor?

✅ Before You Answer

• Verify which line normally carries low-pressure vapor returning to the compressor versus high-pressure liquid leaving the condenser. • Check which connection, if used for charging, is least likely to send liquid directly into the compressor (risk of slugging). • Confirm that the chosen point allows system pressures to be monitored and controlled safely during charging.

Under normal conditions ammonia refrigerant should be charged into which of the following connections of a vapor-compression system?

liquid line service connection

suction service connection

discharge service connection

expansion valve side port connection

🔍 Key Concepts

💭 Think About

✅ Before You Answer