Question 84Refrigeration & AC - Assistant Engineer

The correct answer is D. When adding refrigerant as a vapor to the low side of the refrigeration system, the hose labeled "H" should be connected to the suction service valve service port, the hose labeled "J" should be connected to the vapor valve on the refrigerant cylinder, and the valve labeled "G" should be open. This allows the refrigerant vapor to flow from the cylinder into the low-pressure side of the system. The other options are incorrect because they either have the hoses connected to the wrong ports or have the valve in the wrong position, which would not allow the refrigerant vapor to properly enter the system.