Most refrigerants such as HCFC-22 are made from a single pure chemical compound. Others are made by mixing (blending) two or more different refrigerants. Refrigerant…

Charging charts are sometimes used to charge the system. These charts are usually attached to the unit or included in the manufacturer’s service instructions. Use…

Many certified recovery/recycle units have the capability to recharge recovered refrigerant, in the liquid or vapor state, into a system. When charging with such a…

The thermostatic expansion valve (TXV) maintains a constant superheat over a wide range of load conditions. Because of this, charging using the superheat method cannot…

Superheat is the heat added to refrigerant after all the refrigerant has changed to a vapor. By knowing the amount of superheat in the system…