PRESSURES & TEMPERATURES : Oscar M Moran : 9781736084700 : 1736084704 : 20 Jan 2021 : "This book concentrates on air conditioning equipment that contains R22, R407C and R410A, some of this information can be used to work on other refrigerants, like subcooling, superheat and temperature difference,The explanations are made in simple terms, which allows the reader to gain understanding and knowledge of an air conditioner. Remember pressures and temperatures are examples of measurements taken from air conditioners. These measurements are pretty close to what you should get on an air conditioner during normal operation, measurements that you can use as a guide. The refrigerant (gas) inside the air conditioner does not get wasted; it only circulates throughout the system. If it does not cool, that does not mean that the refrigerant has leaked out, it could be something else.Production of R22 refrigerant has decline since 2010, meaning that the companies will no longer produce R22 refrigeran