🔍 Key Concepts

• Basic refrigeration cycle flow: compressor → condenser → receiver/drier → expansion device → evaporator → back to compressor • Function of the evaporator: low‑pressure liquid absorbs heat and boils, cooling the space or product • Visual cues: color/temperature difference between high‑pressure (hot) side and low‑pressure (cold) side, and location relative to the expansion valve

💭 Think About

• Trace the refrigerant flow on the diagram starting at the compressor discharge and follow it all the way around. Which numbered component is the first large coil after the expansion device? • Look at which coil is shown on the cold/low‑pressure side of the system. How is it different in color and position compared with the hot condenser coil? • Identify the expansion valve in the sketch. Once you’re sure which number that is, which numbered component immediately downstream of it would be inside the refrigerated space absorbing heat?

✅ Before You Answer

• Be certain which side of the system is high‑pressure/hot and which is low‑pressure/cold (often shown with different colors). • Confirm which numbered item is the expansion valve and which is the condenser coil so you don’t mix them up. • Verify that the component you pick is where refrigerant is evaporating (boiling) at low pressure to absorb heat, not where it is rejecting heat to the environment.