Introduction

When installing an air conditioner, the correct length of copper piping is crucial for ensuring efficient performance and proper installation. This guide provides a step-by-step process to determine the required length of copper piping, including important factors such as system layout, measurement techniques, and additional considerations.

Understanding the System Layout

Before you start measuring, it's essential to understand the system layout and where each component will be placed. The indoor unit, outdoor unit, and the pathway between them all play critical roles in determining the piping length. Consider the following:

Indoor Unit Location: Determine the placement of the indoor unit, which is typically located inside the home or building. Outdoor Unit Location: Decide on the position for the outdoor unit, which is usually situated outside the building. Pathway: Identify the exact path the piping will take, accounting for any obstacles, turns, or elevation changes.

Measuring Distances

Accurate measurements are key to determining the correct length of copper piping. Measure the horizontal and vertical distances between the indoor and outdoor units, and add extra length for necessary connections and bends.

Horizontal Distance: Measure the distance along the chosen pathway from the indoor unit to the outdoor unit. Vertical Distance: Measure any vertical distance if the units are at different heights. Add Additional Length: Include extra length for connections, bends, and elevation changes. A common practice is to add about 10% to the total measured length for these factors.

For example, if the horizontal distance is 20 feet and the vertical distance is 5 feet:

20 feet 5 feet 25 feet

25 feet × 1.1 27.5 feet

Consider Pipe Diameter

The diameter of the copper piping can affect the total length required if using multiple pipes for the liquid line and suction line. Ensure you account for both lines if they are separate. The correct diameter of the pipe is also crucial for the proper functioning of the air conditioner.

Review Manufacturer Specifications

Check the installation manual or manufacturer's specifications for any recommendations or maximum allowable lengths for the piping. This information is critical for ensuring efficient operation and warranty compliance.

Plan for Insulation

If insulation is needed for the copper pipes, account for this in your measurements as well. Insulation can slightly increase the overall length required.

Conclusion

To install the air conditioner, you would need approximately 28 feet of copper piping, factoring in additional length for connections and bends. Always round up to the nearest available pipe size to ensure you have enough and to avoid stretching the pipes, as they cannot be stretched. Choose the next available size up if you are in doubt about the length of a shorter line set.