Read each question and decide if the action that's suggested is something you should or should not do when servicing air-conditioning or refrigeration systems. The answers are yes or no.
1. Replace and tighten all seal caps on all valves after servicing?
2. Cool refrigerant drums at atmospheric pressure prior to opening?
3. Operate chiller in “surge” conditions?
4. Confirm overall leak tightness by using a standing vacuum test?
5. Operate equipment known to have leaks?
Answers: 1: Yes, 2: Yes, 3: No, 4: Yes, 5: No.
Source: Carrier Corp. Refrigerant Handbook, 4 th Edition
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