🔍 Key Concepts

• Follow the liquid refrigerant flow from the receiver through valve 14 and see where it branches to each box. • Locate each solenoid valve symbol (S) and see which one is immediately ahead of each expansion valve/evaporator for the chill box and freeze box. • Use the piping and valve numbers (33, 32, 31, etc.) to determine which solenoids feed the upper evaporator (K) and the lower evaporator (J).

💭 Think About

• After refrigerant passes through valve 14, which line does it take to reach the evaporator marked K? Which numbered solenoid is on that line? • Which solenoid is directly in series with the thermostatic expansion valve that feeds the evaporator J? • Are valves 28 and 36 on separate branches or on the same branch after the king solenoid? What does that tell you about whether they can both serve the same box?

✅ Before You Answer

• Confirm that valve 14 is on the main liquid line coming from the receiver, ahead of any branch to individual boxes (this makes it a king solenoid). • Verify which solenoid (28 or 36) is on the line that goes to the evaporator K and which is on the line that goes to evaporator J. • Check if either branch has two solenoids in series to the same box; if not, that rules out any choice saying both 28 and 36 are for the same box.