🔍 Key Concepts

• Location of the hose connection on a centrifugal chiller evaporator shell and whether that space normally contains liquid or vapor refrigerant • Difference between vapor recovery and liquid recovery methods and what phase the recovery machine actually pulls from the chiller in this setup • EPA/USCG-style requirements that you must remove most of the charge, not just what can be pulled off easily in one pass

💭 Think About

• Follow the refrigerant path: from the chiller shell, through the hose, into the condensing unit, and then into the containment tank. At each step, ask yourself: is the refrigerant mainly vapor or liquid here? • Look at where the recovery hose taps into the chiller. In normal operation of a flooded centrifugal evaporator, what is above and what is below that connection point? • Consider whether a single connection pulling off mostly one phase (vapor or liquid) would remove the entire charge and meet the required evacuation levels, or if additional steps are usually needed.

✅ Before You Answer

• Identify the phase of refrigerant at the chiller connection point under normal operating conditions of a flooded centrifugal chiller • Confirm what the condensing unit actually does to the refrigerant before it reaches the containment tank (compression and condensation vs simple pumping of liquid) • Verify whether venting anything back to the chiller shell would be consistent with proper recovery and environmental rules.