Question 103Refrigeration & AC - Assistant Engineer

The correct answer is B. When recovering refrigerant from a centrifugal chiller using the method shown in the illustration GS-RA-58, it minimizes the risk of chiller tube freeze-up. This is because the arrangement of the equipment and associated hoses allows for a controlled and gradual recovery of the refrigerant, which prevents the sudden drop in pressure and temperature that could lead to the freezing of the chiller tubes. The other answer choices are incorrect. Option A is incorrect because exceeding 90% of the weight capacity of the refrigerant drum is not recommended, as it can lead to overfilling and potential safety issues. Option C is incorrect because the recovery levels required by law may not be achieved using this method alone, and further recovery steps may be necessary. Option D is incorrect because the vent hose connection should remain open to allow for the safe and controlled release of the recovered refrigerant.