HVAC Repair Contractors in Long Island Central Air Installs

Central Air Conditioner Installation By HVAC Contractors in Long Island.

A central air conditioner circulates some cool air through a system of supply and return air ducts. The supply ducts carry cooled air from the air conditioner to the room that needs to be cooled. As the air gets warmer, it flows back to the return ducts and it is cooled yet again.

Here is a step-by-step guide to central air conditioner installation service for Long Island residence.



During pre-installation, the HVAC contractor checks the significant parts of the HVAC system infrastructure to ensure that all parts of the house get balanced heating and cooling effect as desired by the owner. These parts include the following

  • Ductwork

If the house had a pre-existing ductwork, it is checked foe leakage, cleanliness, and suitability with the new central HVAC system. The duct system is also insulated to minimize the loss of heat or cool air to the surrounding atmosphere. If the house is new, ducts are laid out.

  • Balancing the air

The contractor also checks on areas where hot or cold air may get out of the house. Areas, where air may be moving to the outside, include the attic, ventilations, and gaps at the windows and doors as well as via the roof.

Other areas that are checked in pre-installation include source of power location for installing the outside unit as well as the source of power. Where the central air conditioner is to be integrated to an existing furnace, the contractor will check on the heat exchanger as well as the furnace filter to ensure efficiency.


A central air conditioner has several parts that include

  • The condensing unit
  • An indoor air handler or a gas furnace
  • Ductwork

The installation of the central air conditioning starts with the ductwork in cases where there was no existing ductwork. After the contractor is satisfied that the ductwork is okay, he moves ahead to install the condensing unit on the outside. On the agreed location, the contractor installs the outdoor compressor and condenser coil, which will be connected to the indoor air handler. The air compressor is usually installed on a concrete pad to prevent picking of dust and other pollutants from the soil.

The contractor proceeds to install coolant lines to the indoor air handler. The lines lead to plenum, which houses the evaporator. There is also a condensate drain leading to the outside to drain away excess water. The plenum is placed on the furnace, which has a blower and cold air return. From this point the supply ductwork are installed with outlet vents that are connected to a thermostat. The thermostat turns on and off the system to maintain the indoor air temperature.

Testing of the central air conditioner  

Once the installation of the central air conditioning system has been completed, the system must be tested to ensure efficiency and that all parts are working as required.

Testing involves a series of actions by an air conditioner expert. For the test to be effective, the outside temperature must be above 60 degrees Fahrenheit for at least two days. High outdoor temperature is critical for testing the equipment efficiency. Moreover, the air compressor unit is not very effective at temperatures below 60 degrees F.

The regulator is then turned to the auto position and the thermostat temperature adjusted to below room temperature of 78 degrees F. This causes the fan and the condensing units to start working. The contractor checks whether both the outside unit and the indoor unit are running.

After the system has run for at least eight minutes, the contractor checks the temperature at the supply and return registers of the system. The difference between temperatures of the both should be about 18 degrees. If the temperature difference goes beyond 20 degrees, the air might be restricted. This is usually a problem with the ductwork or the fan. If the difference is less than 14 degrees, it means that the return system has a problem, there may be low refrigerant, the coil might not be clean; the fan might be too big for the unit, or the compressor is not working as it should. The corrections are done accordingly. Other things that the contractor looks at include the static pressures, the airflow, adjusting the refrigerant, and verifying the final capacity of the system

Ongoing maintenance

Once the system is verified to be working at the desired capacity, it is commissioned. The contractor and the owner of the house enter into a support and maintenance contract. The contract spells the terms of HVAC maintenance Long Island. Support is free for a given system (three to six months depending on your contractor)

The guarantee of the system covers HVAC repair for residents of Long Island in terms of parts and workmanship. After the elapse of the given free support period, the contractor charges for any repairs that he or she is called upon to effect. Many contractors give a flat fee for repairs while others charge by the number of hours that they are at the customer’s premises.

For best service kindly enquire any of the above tips to verify the specialty of the HVAC service providers

Comments are closed.