HVAC Maintenance Contract: AC superheat & subcooling

Understanding superheat and subcooling is essential for ensuring your HVAC system is functioning efficiently and effectively. Dean from Casey Services Heating and Air provides an in-depth explanation of these concepts, which are critical for diagnosing and maintaining the proper operation of an air conditioning system.

Superheat refers to the amount of heat absorbed by the refrigerant as it changes from a liquid to a vapor in the evaporator coil. This process is crucial because it ensures that the refrigerant fully absorbs heat from the indoor air. Technicians measure superheat by checking the temperature of the refrigerant vapor as it exits the evaporator coil and comparing it to the saturation temperature (the temperature at which a liquid boils into a vapor) at the current pressure. This helps ensure that the evaporator coil is absorbing the optimal amount of heat.

Subcooling, on the other hand, measures the amount of heat removed from the refrigerant as it converts back to a liquid in the condenser coil. This process is vital for ensuring the refrigerant is cooled down enough before it cycles back to the evaporator. Technicians measure subcooling by checking the temperature of the refrigerant as it exits the condenser coil and comparing it to the saturation temperature at the current pressure. This confirms that the condenser is effectively removing heat from the refrigerant.

Both measurements require precise tools such as gauges and temperature probes, and they must be compared to manufacturer-specific charts that take into account the current indoor and outdoor conditions. This precision helps prevent issues such as compressor overheating or inefficient cooling.

Dean also discusses the differences between R-22 and R-410A refrigerants, noting that R-410A operates at higher pressures and is more environmentally friendly. Given the phasing out of R-22 and its high cost, Dean advises homeowners with older systems to consider upgrading to newer, more efficient systems rather than continuing to invest in outdated and expensive repairs.

This detailed explanation underscores the importance of having a knowledgeable HVAC technician who can effectively measure and adjust superheat and subcooling, ensuring your system operates at peak efficiency.

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0:00 Intro
0:13 What is Superheat?
1:40 What is Subcooling?
2:00 Types of Freon
3:04 Outro

#HVACMaintenance #Superheat #Subcooling #EnergyEfficiency #HomeCooling

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