Question 147Refrigeration & AC - 1st Asst/Chief

The correct answer is B. When recovering refrigerant from a centrifugal chiller using the method shown in the illustration GS-RA-59, it is possible to achieve the recovery levels required by law without any further recovery. This is because the illustration depicts a closed-loop recovery system, where the refrigerant is recovered as a vapor and contained in a dedicated recovery tank. This allows for the complete removal of the refrigerant charge from the chiller, meeting the regulatory requirements for refrigerant recovery. The other options are incorrect: A) The entire charge may not be removed in one procedure, as the recovery process may need to be performed in multiple stages to ensure complete removal of the refrigerant. C) The containment tank should not be vented back to the chiller evaporator shell, as this would compromise the closed-loop recovery system and potentially release refrigerant to the atmosphere. D) The refrigerant is being recovered as a vapor, not a liquid, as indicated by the closed-loop recovery system design.