Understanding the Major Components of your A/C system

Schematic diagram of an air conditioning systemDiagram legend

Your air conditioning system is a series of components working in unison, much like the human body.

- The [1] Compressor and the [2] Metering Device (Fixed or TXV) are 2 separate components that act together as the heart of the system. The compressor pumps refrigerant, and the metering device regulates pressure.

  • [3] Refrigerant is the blood, and it needs to remain at a specific pressure to function.
  • [4] Driers act like the kidneys, they filter the blood (refrigerant).

- The [5] Air Handler is the lungs of the system.

  • The [6] Return Air is the inhale (warm).
  • The [7] Supply Air is the exhale (cool).

- The [8] Ductwork is like the windpipe. Properly Sized Ductwork is a healthy windpipe. Undersized Ductwork can take a major toll on a system. It’s like trying to breathe through a straw. You can do it, but it’s extremely difficult. It will slowly kill other system components (compressor and fan motor). Static pressure testing can reveal undersized ductwork.

- The Coils act like your skin. They provide a surface for heat exchange to occur while fans provide the 

  • The [9] Evaporator Coil interacts with inside air using the [10] Evaporator Fan Blower to absorb heat from the surrounding environment.
  • The [11] Condenser Coil interacts with outside air using the [12] Condenser Fan to expel heat to the surrounding environment.

- The [13] Thermostat is the brain of the system.

- [14] Capacitors are the conscience, they give motors direction. Without them Motors would not know which way to turn.