| When removing the primary refrigerant from a system using water as a secondary refrigerant, it is important to follow which procedure(s) to safeguard the equipment? |
| A) Insure that the water is drained or continually circulating to avoid freeze-up. |
| B) Insure that the water and refrigerant separator is functioning properly. |
| C) Insure that the water doesn't become contaminated with oil in the direct contact heat exchanger. |
| D) Leave some refrigerant in the system to prevent the water from contaminating the refrigerant if there is a leak. |
