Are you looking to replace your central air conditioner? If so, you’ve come to the right place! In this step-by-step guide, we’ll walk you through everything you need to know to replace your AC unit, from determining the correct size to testing the system.
We’ll cover all of the necessary steps, such as gathering the right tools and supplies, disconnecting the existing unit, and installing the new unit.
We’ll also go over how to connect the new unit to ductwork, electrical, and gas systems.
So, let’s get started and learn how to replace a central air conditioner system!
Table of Contents
Short Answer
Replacing a central air conditioner can be a big project, but it’s doable if you know what you’re doing.
First, you’ll need to purchase the new unit and have it delivered.
Then you’ll have to disconnect the electrical and refrigerant lines from the old unit, remove the unit from its mounting bracket, and install the new unit.
Finally, you’ll need to reconnect the electrical and refrigerant lines, and check the unit for proper operation.
If you’re not comfortable doing this yourself, it’s best to hire a professional installer.
Determining the Correct Size AC Unit
When it comes to replacing a central air conditioner, the process starts with determining the correct size unit for the space youre cooling.
An incorrectly sized unit can cause inefficiencies and problems, so its important to make sure you have the right size.
The size of your central air conditioner should be based on the size of your home or the size of the space youre cooling.
To determine the size, youll need to measure the total square footage of the area youre cooling and calculate the number of BTUs (British thermal units) youll need to properly cool it.
Youll also need to consider other factors such as the number of windows and the amount of insulation in the space.
Once youve determined the size of the space, youll know the size of the unit you need.
If youre unsure about the size you need, or if youre not confident in your calculations, its best to consult with a professional to ensure you get the right size.
Gather the Right Tools and Supplies
Replacing a central air conditioner is a big job, but with the right tools and knowledge, it can be done relatively easily.
Before getting started, it’s important to gather the necessary supplies and tools to ensure the job is done correctly.
For starters, you’ll need a few basic tools including screwdrivers, wrenches, a hammer, and a drill.
Additionally, you’ll need some duct tape, foil tape, and a few other supplies to work with.
You’ll also need to have a good understanding of the electrical and gas systems in your home, as you’ll need to disconnect and reconnect these systems during the installation process.
You’ll also need to have the correct size unit for the space.
An incorrectly sized unit can cause inefficiencies and problems, so it’s important to make sure you have the right size before you begin.
Once you have the right size unit, you’ll need to purchase the correct mounting brackets, screws, and other necessary pieces to complete the installation.
Having the right tools and supplies is essential for a successful central air conditioner replacement.
Make sure to gather all the necessary items before beginning the job, and if you’re uncertain about any of the steps, it’s best to consult an experienced technician.
Disconnect the Existing AC Unit
Replacing a central air conditioner can be a major project, but it is important to start by disconnecting the existing unit.
This is the first step in the process, and it requires the right tools and knowledge to do it safely and correctly.
The most important thing to remember when disconnecting the existing unit is to make sure that all of the power sources are turned off before starting.
This could include turning off the power at the circuit breaker, unplugging the power cord from the wall outlet, or disconnecting any other electrical sources.
Once all power sources are off, the next step is to remove the external cover of the existing unit, which should give you access to the internal components.
Depending on the type of unit, you may need to disconnect some of the components from the unit, such as the electrical wiring, compressor, or condenser coils.
Once all of the components have been disconnected, the unit should be ready to be removed from the location.
Be sure to take care when disconnecting and removing the unit, as it can be very heavy and difficult to maneuver.
Removing the Existing Unit
When it comes to replacing a central air conditioner, the first step is to remove the existing unit.
This is a vital part of the process, as it allows for the new unit to be installed in its place.
To begin, it is important to ensure that all power to the unit is shut off.
This includes both the electrical and gas systems that are connected to the unit.
Once the power is shut off, the existing unit can be disconnected from the ductwork, electrical, and gas systems.
Next, the fan motor and other components can be removed from the existing unit.
It is important to be careful when removing these parts, as they can be difficult to reattach.
Once all the components are removed, the existing unit can be unbolted from its mounting brackets and removed from the space.
Finally, the mounting brackets and other hardware should be inspected for any damage or corrosion.
This is an important step, as damaged or corroded parts can cause problems with the installation of the new unit.
Once the existing unit is removed, the area should be thoroughly cleaned and any damaged parts should be replaced before continuing.
Installing the New Unit
Once the correct size of the new central air conditioner has been determined, the next step is to disconnect the existing unit and remove it.
This should be done carefully, as the existing system may contain refrigerant gas that needs to be disposed of properly.
Once the existing unit has been disconnected and removed, the new unit can be installed.
This will involve connecting the unit to the existing ductwork, electrical, and gas systems, as well as any additional components such as a condensate pump or humidifier.
When installing the new unit, it is important to take extra care to ensure that all connections are properly sealed and secure.
This will ensure that the system operates efficiently and reliably.
Additionally, the new unit should be insulated to prevent any condensation buildup and ensure that the system runs as efficiently as possible.
Once the new unit has been installed, it should be tested to make sure it is operating correctly.
This can involve checking the system for proper air flow, temperature, and humidity levels.
Additionally, the system should be checked for any leaks or other issues.
Connecting the New Unit to Ductwork, Electrical, and Gas Systems
Once the correct size of central air conditioner has been chosen, the next step is connecting the new unit to the existing ductwork, electrical, and gas systems.
This is best done by a professional HVAC technician who is experienced in this type of work.
Properly connecting the unit to the existing systems ensures that it will run efficiently and safely.
Before connecting the new unit, the technician should inspect the existing ductwork, electrical wiring, and gas lines for any damage or wear.
If any of these components need to be replaced or repaired, this should be done before the new unit is connected.
Once the existing systems have been inspected and repaired, if needed, the technician can begin connecting the new unit.
The technician should carefully follow the manufacturers instructions for connecting the unit to the existing ductwork, electrical wiring, and gas lines.
This includes properly connecting the unit to the thermostat, which is necessary for the system to be able to run properly.
The technician should check all the connections to make sure that they are secure and that the unit is properly connected to the existing systems. Once all the connections have been checked, the technician can proceed to the next step: testing the system to make sure it is operating correctly.
Testing the System
Testing the system after replacing a central air conditioner is a crucial step in the process.
After the new unit is installed and connected to the existing ductwork, electrical, and gas systems, it is important to make sure it is operating correctly.
The easiest way to test the system is to turn on the thermostat and allow the system to run for a few minutes.
All of the vents should be checked to ensure that air is coming out of them at the correct temperature.
Any unusual noises or odors should be inspected and dealt with immediately.
If the system is not cooling correctly, it is likely that there is an issue with the installation or the unit itself.
It may be necessary to contact a professional for assistance in this case.
Final Thoughts
Replacing a central air conditioner can be a daunting task but, with the right knowledge and tools, it is a manageable and relatively straightforward process.
Now that you know the steps involved, take the time to do your research, gather the necessary supplies, and make sure you’re properly prepared before beginning the process.
With the right preparation and guidance, you can easily replace your central air conditioner and have a cool, comfortable home in no time.
