EPA 608 (TYPE II) Exam

When a new system has been assembled, the first thing to do is? Correct Answer - Pressurize the system with an inert gas & leak check. After installation of a field-piped R-410A split heat pulp, the unit should first be? Correct Answer - Pressurized with nitrogen then leak checked. The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial & industrial process refrigeration) must be repaired when the leak rate exceeds _________ of the charge per year? Correct Answer - 15% R-410A requires recovery tanks rated for at least? Correct Answer - 400 psig After refrigerant liquid has been recovered from a system, any remaining vapor is? Correct Answer - Condensed by the recovery system. Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be recovered/recycled? Correct Answer - Recover as much R-502 from the recovery unit as possible, change filter, & evacuate. In a refrigeration system with a TXV (or other type of throttling device), the component directly following the condenser is the? Correct Answer - Receiver When charging an R-410A system that uses a water-cooled condenser, you must first charge with vapor to a pressure of at least________, before switching to liquid charging. Correct Answer - 120 psig