| A refrigeration plant has been prepared for opening up the system for non-major repairs by performing a system pumpdown and bringing the part of the system to be opened to 0 psig. At the completion of the repairs and after re- closing the system what is the recommended procedure? |
| A) performing a dehydration evacuation on that part of the system which was open with a deep vacuum pump |
| B) performing an evacuation on that part of the system which was open with a self- contained refrigerant recovery unit |
| C) purging that part of the system which was open with dry nitrogen |
| D) introduce the system charge into that part of the system which was open |
