EPA Type 3 Chapter 4Get your EPA 608 Certification for FREE Show In this module, we will discuss the different refrigerant recovery methods and a couple of techniques for faster recovery. We will also discuss the pieces of equipment used for the recovery process. Skip to quiz!
A water-cooled recovery unit uses a condenser coil that cools down the recovered vapor refrigerant and converts it into a liquid. The recovery unit’s condenser coil is similar to the condenser coil in a refrigeration appliance. Local municipal water supply is continuously passed over the condenser coils to cool it. Other recovery machine types heat up after some time due to the large amount of refrigerants. A water-cooled recovery unit is generally used to recover large amounts of refrigerant in comparatively less time.
Refrigerant is first recovered in liquid form for faster recovery. As refrigerant oil is mixed with refrigerant, liquid recovery causes loss of refrigerant oil.
A lower amount of refrigerant oil is mixed with the vapor as compared to liquid refrigerant. So vapor recovery minimizes the loss of refrigerant oil from the system during recovery. An average 350 ton R123 chiller at 0 psig still contains 100 pounds of vapor after all the liquid refrigerant has been removed. So it is important to recover the vapor refrigerant after liquid recovery. Tonnage is the cooling capacity of any appliance. For example, we commonly say a 5 ton AC referring to its cooling capacity.
A higher ambient or room temperature leads to a faster recovery. The shorter the length of the recovery hoses, the faster the refrigerant flows through it.
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