Window Air Conditioner – Understand Its Working And Thermostat Programming

Window airconditioner has a rigid base, which holds all the working parts. Base is assembled within a metal casing, which is fixed in window or wall of the room.

Whole window assembly is divided in two compartments, the interior and exterior side. Interior side provides cooling effect, while exterior side releases the heat gathered from the room to the atmosphere.

Voltas Window AC front panel is decorated beautifully with front air grills. Adjustable louvers allow for supplying coolness in desired direction. Grill has single opening to allow access to operating or control panel.

Other categories of window air conditioner are refrigerant system, ventilation system, control system, air circulation system, and electrical protection system.

How air conditioners work?

Window air conditioners work in two cycles –

  1. Room air cycle
  2. Hot air cycle

The compartments performing the cycles are separated with an insulated partition within the unit.

Room air cycle

When AC is turned on, the blower activates instantly and after some seconds compressor starts. Cooling coil is located in the front, which cools on the start of compressor.

Blower behind cooling coil sucks heated air that includes dust and dirt particles. So, air first passes through the filter on its way to the blower and thus dirt and dust gets removed. This air then passes over cooling coil, where first the refrigerant absorbs heat from the air and room turns cool.

Simultaneously, dew gets formed on cooling coil due to decrease in temperature and so the moisture from air returning back to the room gets reduced. In brief, the air passing over cooling coil helps to reduce its temperature and humidity, at the same time.

The blower sucks this reduced temperature along with dehumidified air and throws it back into the room at high pressure through front panel grill.

Cool air absorbs heat and moisture, which is sucked again and the cycle repeats.

Hot air cycle

Hot air cycle means atmospheric air used to cool condenser. Window AC condenser is positioned on the back side and exposed to outside atmosphere. Propeller fan is also located behind condenser, which sucks air and blows over the condenser.

Condenser holds the refrigerant, which needs to be kept cool, so as to produce proper cooling effect. Heat from the refrigerant gets absorbed by the atmospheric air passing over and releasing back in the environment.

When you stand behind the window AC, you will clearly feel the hot air being released. After the refrigerant gets cooled it enters expansion valve and flows to the evaporator. Thus the hot air cycle goes on and on.

Programming the thermostat

Thermostat is used to set room temperature using remote control or knob. Knob will include numbers on round scale, which will need to be moved to desire temperature setting. Remote control has display screen and you can set the temperature using the buttons.

Remember, when desired temperature is obtained within the room, compressor stops. Thermostat restarts compressor as soon as high temperature is detected inside the room.

Thermostat needs to be programmed appropriately and not keep it low to avoid electricity bill. In such condition, the unit will struggle hard to maintain room temperature.