HVACR System Installation and Start-Up Residential Unit 10 Questions and Answers | New One | Grade A+

When charging a refrigeration system with a near-azeotropic mixture, what must be done to prevent liquid from entering the system? Ans: The correct answer is: Charge as a liquid through the low side using a restrictor. The factory charge in a split system, using R-22, shows 6 lb. 8 oz. in the outdoor condensing unit and 2 oz. in the evaporator. The 3/8" liquid line contains 0.48 oz. per foot and the 7/8" suction line contains 0.10 oz. per foot. The refrigerant lines are 30' long. What is the correct refrigerant charge for this system? Ans: The correct answer is: 7 lb. 11 oz. If the tank is a reusable tank, there are no check valves and system refrigerant can enter the tank as long as the system pressure is higher than the pressure in the tank. Ans: The correct answer is 'True'. Refrigerant in vapor form is normally put into the system through the ____. Ans: The correct answer is: suction line Refrigerant in liquid form is normally put into the system through the ____. Ans: The correct answer is: liquid line When charging a system with vapor refrigerant from a refrigerant cylinder the cylinder will become ____. Ans: The correct answer is: cold One good feature of an electronic charging scale is that it counts upward as refrigerant is removed, to tell the technician how much refrigerant was used. Ans: The correct answer is 'True'. Glide is the range of temperatures/pressures in which a blended refrigerant will condense. Ans: The correct answer is 'True'