Monthly Archives: October 2017

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Getting Smart With Hermetic Electric Motors

Hermetic Motors Motors can be external or internal(Hermetic). If the motor and compressor are located inside a housing or dome, it is labeled as a hermetic electric motor. To be classified as hermetic, the encasement surrounding the internal operations of a system must be airtight not allowing the flow of air from inside to outside. [...]

8 Types of Electric Motors

Types of Motors Electricity drives electric motors and motors drive and control HVAC and refrigeration systems. Therefore, an understanding of the types is important. Each type will do a certain task at certain frequencies and duration. External Drive Motors External drive motors are found outside the housing of a compressor. A belt connects the compressor [...]

Refrigerant Classifications

Classifications Refrigerants are classified into toxicity and flammability levels for safety and use in HVAC systems. Safety organizations make determinations of potential hazard by classifying refrigerants based on what would happen should a human inhale, ingest, or touch the gas. The organizations responsible for these classifications are the American Society of Heating, Refrigerating and Air [...]

Refrigerant Blends; Azeotropic and Zeotropic

Refrigerant Blends Blends are a combination of two or more other single component refrigerants. These blends have different chemical and interactive properties. Refrigerants are substances that are mixtures and undergo constant phase transitions from liquid to gas and vice versa. They may also be classified as azeotropic or zeotropic An ideal refrigerant blend will be [...]

By |2017-11-06T23:31:46+00:00October 5th, 2017|Categories: Gases|Tags: , , , , |0 Comments

Chlorofluorocarbons, Hydrochlorofluorcarbons, and Hydrofluorocarbons

Chlorofluorocarbons(CFCs) Chlorofluorocarbons(CFC) were created approximately sixty years ago and are the first halogen-based compounds to be introduced to the HVAC industry. They are made up of fluorine, carbon, and chlorine. CFCs are low in toxicity and are noncorrosive. They are not flammable and do not explode. It is not recommended they be released in great [...]

Refrigerant Coding

Refrigerants A refrigerant is most often a fluid that is a mixture used in the HVAC cycle. It undergoes transitions from a liquid to a gas and back to a liquid. Refrigerants can be propane, hydrocarbons, ammonia, fluorocarbons, hydrofluorocarbons, and hydrochlorofluorocarbons. They may be further defined as being azeotropic and zeotropic. In the early days [...]

By |2018-01-04T17:12:12+00:00October 1st, 2017|Categories: HVAC Maintenance, HVAC Technology|Tags: , , , , |0 Comments