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LEARN MORE ABOUT HVAC

LEARN MORE ABOUT HVAC
What is HVAC?
HVAC is an abbreviation that stands for Heating, Ventilation, and Air Conditioning. Sometimes it is extended to HVAC/R, which includes Refrigeration. HVAC is a system used to provide comfortable temperatures and indoor air quality to specific environments. HVAC systems are located in residential, commercial and industrial environments and its applications can vary greatly depending on the setting in which it is being used. It is a core part of how a building functions, how much it costs to maintain, and how comfortable and safe it is. In this article, we will talk about the key things that you need to know about HVAC and the service providers who install and maintain it.
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LEARN MORE ABOUT HVAC
5 Tips to Becoming a Profitable HVAC Service Technician
There are many knowledgeable HVAC Service Technicians out there who are profoundly good at their jobs but fail to make solid profits for their company. As we all know, the best way to increase your paycheck is to increase your company's profit. Most HVAC technicians just aren't focused on the business aspect while performing their duties on a service call. Unfortunately, simply solving your customers problems and making the required repairs will not translate to maximized profit margins. It is important for technicians to enter every service call with strategic planning.
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HVAC BASICS

HVAC BASICS
How to Calculate Superheat
Superheat is the measured value of the difference between the actual temperature of a refrigerant vapor and the saturation temperature of that refrigerant at the same pressure. Another way to describe it is the temperature of a vapor above it’s boiling temperature at a given pressure.
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HVAC BASICS
How to Calculate Subcooling
What is Subcooling Subcooling is the measured value of the amount the refrigerant liquid is cooled before exiting the condenser.
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HVAC BASICS
How to Test Single Phase Compressor
The compressor should also be checked for resistance to ground. With the wiring still removed from the compressor terminals test the resistance of each terminal to ground. Ensure that your lead is making a solid connection to ground without any interference from dirt, paint, rust or any other debris. If no grounds are present you should read infinite (OL) resistance.
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HVAC BASICS
How to Test Three Phase Compressor
A single phase compressor will have three terminals. T1 – T2 – T3 Remove the wiring from the three terminals before testing. Set your multimeter to read ohms. Check the compressor for resistance to ground. With the wiring removed from the compressor terminals, test the resistance of each terminal to ground. Ensure that your lead is making a solid connection to ground without any interference from dirt, paint, rust or any other debris. If no grounds are present you should read infinite (OL) resistance. If grounds are present the compressor will need to be replaced.
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HVAC BASICS
How to Test Contactors
Contactors are used in both residential and commercial HVAC units as a means of energizing or de-energizing a load (usually a fan motor or compressor). Contactors are electrically controlled switches which use low voltage power to control high voltage/high amperage loads. A contactor consists of a coil that when energized creates a magnetic field around a laminated core. This magnetic field is used to pull the contacts closed, applying power to the load. Springs are used to open the contacts when the magnetic field is de-energized.
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HVAC BASICS
How to Test Start and Run Capacitors
A capacitor is an electrical device which stores an electrical charge. They are typically used in HVAC systems on fan motors and compressors. In an HVAC system there are typically 2 types of capacitors which are used. Start capacitors are used to provide extra torque to compressors during start-up. After the compressor is started, a potential relay disconnects the capacitor from the compressor. Run capacitors are used to provide a relatively constant voltage supply to fan motors and compressors. Run capacitors also increase torque during start-up.
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