Step-by-Step Guide to Installing a DIY Mr Cool Mini Split Dual Zone System

Step-by-Step Guide to Installing Your Air Conditioning System

Air conditioning is almost a necessity in today’s world, especially in regions where summers can get unbearably hot. Instead of hiring a professional HVAC technician, you might consider installing an air conditioning unit yourself, particularly after realizing the potential cost savings. Although it might sound intimidating, a self-installation can be accomplished by a person with average technical skills and a bit of patience. In this guide, we’ll take you through a detailed step-by-step process to install a two-zone air conditioning unit. If you have any questions, feel free to leave them in the comments section, and we will be more than happy to assist you.

Unboxing and Initial Preparations

First, let’s unbox the 12,000 BTU head unit. It’s crucial to have a ceramic blade tool, which is excellent for opening boxes without cutting too deep. This tool will be a valuable addition to your toolkit, and we’ll provide a link to purchase it.

Upon opening the box, you will find:

• A template for the bracketing: This template will indicate the exact measurements and holes you need to drill. Keep it safe until the job is complete.
• Warranty information: Note that self-installation might void the warranty unless a certified HVAC technician signs off on it and submits it for you.
• Various components wrapped securely in packing materials.

Carefully unpack the unit and lay it flat for convenience. The unit comes with a wall-mounting plate that attaches to the wall. This plate is clearly labeled and has predefined holes for screws.

Wiring the Indoor Unit

Now, for the electrical connections:

1. Locate the electrical connection area under the top cover of the unit.
2. Using the provided template, mark where to drill holes. Ensure the marks align with the electrical contact points inside the unit.

Each wire needs to be connected to the appropriate terminal, generally labeled:

• Ground (marked with a grounding symbol)
• Numbers 1, 2, and 3 for the corresponding wires

Be meticulous in matching the colors of the wires with the corresponding numbers to ensure seamless integration with the outdoor unit later.

Drilling Through the Wall

Drilling a hole through your wall for the pipes and wiring might be the most nerve-wracking part of the installation process:

1. Choose a high-quality hole saw (2.5-inch or 3.5-inch, depending on your line set).
2. Begin by drilling a pilot hole straight through the wall.
3. Continue drilling carefully to avoid damaging the interior and exterior surfaces.

The hole will serve as the exit point for the AC’s refrigerant lines, drain line, and electrical connections. Ensure you drill at a slight downward angle from inside to outside to aid with drainage.

Installing the Wall Mount Plate and Indoor Unit

With the hole drilled, it’s time to mount the wall plate:

1. Align the wall plate using the marks from the template.
2. Fix the plate securely to wall studs for the best support.
3. Double-check that the plate is level both horizontally and vertically.

Once mounted, the next step is to connect the unit’s tubing and wiring:

1. Feed the drain line, refrigerant lines, and power cables through the drilled hole to the outside.
2. Attach the indoor unit to the wall plate by lifting and pressing until it clicks into place.

Setting Up the Outdoor Unit

Position the outdoor unit in a well-ventilated, shaded area. Use the provided brackets to mount it:

1. Locate wall studs and pre-drill holes for the lag bolts.
2. Fix the brackets into place and ensure they are level to support the weight of the outdoor unit.

Connecting the Line Set

The line set comprises the refrigerant line and the drain line:

1. Carefully unroll the refrigerant lines to prevent kinking.
2. Insert the drain line into the outdoor unit through the pre-drilled hole.

Remember to keep the protective caps on the refrigerant lines until you are ready to connect them to avoid contamination.

Connecting the refrigerant lines involves:

1. Flare the ends of the tubes properly to ensure a tight seal. We highly recommend using a specialized flaring tool for a flawless connection.
2. Connect the lines to the respective ports on the outdoor and indoor units. Always use two wrenches to ensure a tight but not overly tightened fit, avoiding potential leaks.

Vacuuming the System

Before releasing the refrigerant, it’s crucial to remove any air and moisture from the system:

1. Connect a gauge manifold set to the service ports and a vacuum pump.
2. Let the vacuum pump run for about 15 minutes. Monitor the gauge to ensure it reaches the required vacuum level.
3. Turn off the pump and let the system sit for a few minutes. If the needle holds steady, it indicates there are no leaks.

Charging the System

Finally, release the refrigerant to charge the system:

1. Open the main service valves using an Allen key. You will hear a hissing sound as the refrigerant enters the lines.
2. Check for leaks using soapy water around the flared connections. If no bubbles form, your connections are secure.
3. Reinstall protective covers on the service ports.

Next, convert the units using the provided adapters if the ports on the line set don’t match with the outdoor unit ports. These adapters bring the line set to the correct diameter, ensuring a proper connection.

Powering Up

Wire in the electrical connections:

1. Ensure the power cable from the outdoor unit matches the wiring pattern inside.
2. The power cable should be properly grounded and connected to the corresponding terminals.

After confirming all connections:

1. Flip the breaker to supply power to the unit.
2. Turn on the air conditioner and check its functionality. Ideally, you should feel cold air within a few minutes of operation.

Testing and Final Adjustments

Use a thermometer to measure the temperature of the air coming out of the vents. This will give you an immediate indication of the system’s efficiency:

1. Run the system for about 10-15 minutes.
2. Measure the temperature again to confirm it has reached the desired level.

Conclusion

You did it! Installing an air conditioning system on your own is not just feasible but can also be incredibly rewarding. Plus, it saves money that would otherwise be spent on professional installation services. However, the key is to be thorough and meticulous at each stage of the process to avoid common pitfalls like refrigerant leaks or electrical issues. Always ensure safety first, both for yourself and your equipment.

Feel free to ask any questions or share your experiences in the comment section. If you found this guide helpful, subscribe and like the content for more informative DIY projects. Here’s to a cool and comfortable home!