three way manifold

three way manifold
Gauges used for testing refrigerant pressures.

Sunday, September 19, 2010


Has your air conditioning unit ever died on a rainy day? Even though the temperature is lower on rainy days, it's still miserable, right? We know that the temperature isn't what's causing this misery. It must be something else this time. Is there something else your air conditioner does other than cool the air? Well, the answer is yes. Keep reading and learn something about your A/C system that shows it actually pulls a double duty in your home.

Have you ever noticed a cold glass of iced tea sitting on the table? Have you also noticed that it builds up water on the outside of the glass while it sits there? Did you realize that water is condensation? It's the same thing as the dew on the grass in the mornings. Condensation is caused when cold air mixes with warm air. It's how rain is caused. It's how the dew on the grass is caused. It's also caused when warm air in your home flows through a cool evaporator coil.

An evaporator coil is the main cooling component of your air conditioning unit inside the home. You see, refrigerant is constantly cycled through the air conditioning unit from outside to inside, and then back outside. The refrigerant enters the evaporator coil inside the home as a very cold vapor. This cold vapor flows through the tubing of your evaporator coil, cooling the aluminum fins which are exposed to the warmer air which is forced through the fins by a fan inside this air handling unit.

As the warm air is forced through the cold coil, condensation begins to form on the coil. For this reason, air conditioning units have drains for the condensation build up. As this condensation is accumulated on the evaporator coil, the humidity level in your home starts to drop. You may have noticed that higher humidity makes air uncomfortable.

When it rains, the humidity level is high. This high humidity level comes into the house whenever a door or window is opened. This increases the humidity inside your home just like running a hot shower, or boiling water on the stove will. If your air conditioning unit stops working at a time like this, you will definitely be miserable.

Please keep your AC unit maintained because you don't want it to break down on a rainy day.

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