Tentamen (uitwerkingen)
EPA Type 2 Questions and Answers Already Graded A
- Vak
- Instelling
EPA Type 2 Questions and Answers Already Graded A Heat pumps that have been retrofitted from R22 to R407C should be leak checked with: pressurized nitrogen When a new system has been assembled, the first thing to do is: pressurize the system with inert gas and leak check EPA regulations require ...
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