MRCOOL DIY Mini Split: In-Depth Installation

Welcome to our step-by-step guide on installing your MRCOOL DIY Mini Split! Whether you're looking to cut down on costs, take on a new home project, or simply enjoy the satisfaction of doing it yourself, you've come to the right place. Installing a mini split system can seem daunting, but with the right tools and a bit of patience, you’ll be enjoying your new climate-controlled comfort in no time. In this blog, we'll walk you through everything you need to know, from the essential tools to the finishing touches. So grab your toolkit, and let’s get started!

MRCOOL DIY Mini Split Components

The MRCOOL DIY Mini Split system is designed to bring comfort to your home with a touch of modern efficiency. Here’s a breakdown of its components:

Indoor Unit: This sleek air handler is where the magic of cooling and heating your space happens. It distributes air quietly and efficiently, ensuring your comfort. The unit comes with a washable air filter and customizable airflow options, including auto-swing louvers, to optimize air quality.

Outdoor Unit: This robust condenser unit plays a key role in expelling heat from indoors. It’s engineered for energy efficiency and is built tough to withstand various weather conditions. Plus, it operates quietly thanks to its noise reduction technology.

Remote Control: With the handy remote, adjusting the temperature, fan speed, and selecting modes is a breeze. It’s user-friendly and includes a built-in timer that adapts to your schedule, making it convenient to manage your home’s temperature.

Pre-charged Refrigerant Lines: These factory-charged lines are a game changer, making the installation process smoother and enhancing the overall efficiency and performance of the system.

Quick Connect System: This feature is especially great for DIY enthusiasts. It ensures a secure and straightforward connection between the indoor and outdoor units, making setup a snap.

Wi-Fi Capability & Smart Home Integration: The system’s Wi-Fi connectivity and smart home compatibility allow you to control your mini split from your smartphone or even with voice commands. This tech-savvy integration brings comfort and energy efficiency right to your fingertips, no matter where you are in the house.

Each part of the MRCOOL DIY Mini Split system is designed with your convenience and comfort in mind, making it a smart choice for maintaining the perfect home environment.

This photo displays the components included in your MRCOOL DIY kit

How Can You Install a MRCOOL DIY Mini Split?

Installing your MRCOOL DIY Mini Split system can be a great way to enhance your home's comfort without needing professional help. Here’s how you can do it, step by step:

1. Select the Ideal Location

For the indoor unit, choose a wall that is at least 7 feet above the floor with adequate space for air circulation. Avoid locations where gas may leak or where there is heat or steam. The outdoor unit should be placed on a flat surface, such as a concrete pad, and should be away from direct sunlight and debris.

2. Mount the Indoor Unit

• Use the wall mounting plate as a template to mark the drill spots on your wall, making sure it is level.
• Drill holes and insert plastic anchors into the wall.
• Secure the mounting plate to the wall with the provided screws.

3. Drill a Hole for the Conduit

• Drill a 3.5-inch hole through the wall, just below the mounting plate. This hole will accommodate the conduit that connects the indoor and outdoor units.
• Ensure the hole slants slightly downward towards the outside to prevent water from entering.

4. Install the Conduit

• Pass the communication wire, power cable, and refrigerant tubing through the hole.
• Connect these lines from the indoor unit to their corresponding ports.

5. Connect the Indoor and Outdoor Units

• Extend the refrigerant lines, power cable, and communication wire to the outdoor unit. Use the pre-charged quick-connect line set that comes with your MRCOOL unit, which doesn't require special tools or gauges for installation.

6. Install the Outdoor Unit

• Place the outdoor unit on a solid and level surface. If the surface is uneven, use a mounting pad or vibration pads to stabilize the unit.
• Connect the quick-connect line set to the outdoor unit. Ensure all connections are secure and tight to prevent leaks.

7. Electrical Connections

• Connect the power cable to the circuit breaker. Ensure this connection complies with local electrical codes.
• The MRCOOL DIY Mini Split units typically come with a pre-wired power cable which simplifies this step.

8. Start Up the System

• Open the valves to release the refrigerant. Follow the manufacturer's instructions to ensure correct pressure and flow.
• Power up the unit and check all functions via the remote control to ensure everything is working correctly.

9. Seal and Insulate

• Seal the hole in the wall using weather-resistant caulk.
• Insulate the refrigerant lines to maximize efficiency and minimize energy loss.

By following these detailed steps, you should be able to install your MRCOOL DIY Mini Split system successfully. These units are designed to make DIY installation as easy and straightforward as possible. However, if at any point you feel unsure, it’s wise to consult with or hire a professional HVAC technician. Enjoy your new, efficient cooling and heating system!

Professional Installation Cost

If you're thinking about hiring a professional to install your MRCOOL DIY mini split, be aware that this could increase the overall cost. Prices usually range from $1,000 to $2,000, sometimes more, depending on how complex the job is and where you live. You can find licensed professionals, like handymen or electricians, on websites like Angi to get a quote tailored to your installation needs.

While hiring a pro might bump up your initial costs, it also brings some perks. You'll have the peace of mind that your system is set up correctly, which could help it last longer. Plus, a professional can walk you through how to operate and maintain your unit, ensuring you get the best efficiency out of it.

However, it’s good to remember that the MRCOOL system is designed with DIYers in mind. If you're comfortable with basic DIY tasks, you might enjoy tackling the installation yourself!

Watch our video to uncover the possibilities of DIY HVAC installation

Starting Your Installation

Before MRCOOL DIY Mini Split Installation: It's really important to take a good look at your space and think about a few key things before setting up your system. Consider the size of the room, how well it's insulated, and how much sunlight it gets. These factors play a big role in how well your system will work. Getting a handle on these details can help you install it just right, make the most of its efficiency, and even extend its lifespan.

Choosing Indoor Unit Location (Air Handler): Tips to Pick the Right Spot

• Make sure there's good air flow and an easy way to handle water drainage.
• Choose a place where the unit won't cause noise issues.
• The unit should sit on a stable, vibration-free surface that can hold its weight.
• Keep it at least 3 feet away from other electronic devices to avoid interference.
• Steer clear of heat sources, steam, flammable gases, or anything that can catch fire.
• Ensure the space around the unit is free of any obstructions that might block air flow.
• Minimum clearance from the ceiling: 5.9 inches
• Side clearance: 4.75 inches
• For ceilings over 9 feet, mount the unit about 90.55 inches from the floor.
• For ceilings under 9 feet, mount it around 78.55 inches from the floor.

Choosing Outdoor Unit Location (Condenser): Use the following guidelines to help you select an appropriate location.

• Ensure a spot with good air circulation and ventilation.
• Avoid placing near obstacles, busy streets, crowded areas, animals, plants, or sources of combustible gas.
• Choose a location away from excessive dust, salt air, or areas prone to forced water exposure.
• Protect the unit from prolonged sun exposure, rain, and in snowy areas, take steps to prevent ice buildup and coil damage.
• Clearance above the unit: 24 inches
• Clearance in front: 79 inches
• Left side clearance: 12 inches
• Right side clearance: 24 inches
• Back clearance from the wall: 12 inches if ground-mounted, 6 inches if bracket-mounted.

Prepare your tools: Getting Ready for Installation

• Start your MRCOOL DIY mini split installation by gathering your tools: a stud finder, level, drill, 3 1/2-inch hole saw, and adjustable wrench.
• Use the stud finder and level to ensure proper placement of the indoor unit.
• The drill and hole saw are needed for making space for the refrigerant lines.
• Use the wrench to tighten and secure components.
• Always follow the manufacturer's guidelines for a safe and efficient installation.

Electrical Considerations

Understanding Power Requirements: When installing your MRCOOL DIY Mini Split, it’s really important to check that your home's electrical system can handle the unit's power needs. Depending on the model, these mini splits need between 110-240 volts. You can find the specific details for your model on the MRCOOL specification sheet. If your home doesn’t meet these power requirements, there’s a risk of overloading your system or encountering electrical issues, which could affect both performance and safety. Make sure everything matches up to enjoy a smooth and safe operation of your new mini split system!

MRCOOL DIY MINI SPLIT: Single Zone Specification Sheet 

MRCOOL DIY MINI SPLIT: Multi-Zone Specification Sheet

Understanding the MRCOOL Wiring Diagram:

Getting the wiring right is crucial when setting up your mini split. Each wire color serves a specific purpose—like red for power, black for neutral, and green for ground. It's really important to connect everything correctly because mistakes could lead to problems or even damage. Make sure to follow both local and national electrical codes, and consider having a licensed electrician do the installation to ensure it's done right. Keep in mind that the wire colors in your MRCOOL mini split might be different from previous models or standard color codes, so always check the wiring diagram in your manual.

Managing Your Mini Split Communication Wire:

The communication wire in your MRCOOL DIY mini split is vital for smooth interaction between the indoor and outdoor units. Correct installation of this wire is crucial to keep your system running efficiently without disruptions. To make sure everything is set up perfectly, it’s a good idea to hire a certified electrician who can handle the job professionally.

Note: Always refer to your MRCOOL DIY Mini Split system's manual for specific installation instructions and safety information. If any part of the installation, especially the electrical work, feels a bit out of your comfort zone, it’s a good idea to call in a professional.

Useful MRCOOL Installation Videos

Watch this quick video for an easy MRCOOL DIY mini spli installation.

Watch this quick video for an easy MRCOOL DIY Ceiling Cassette installation.

Exploring DIY Mini Split Accessories

Boost Your MRCOOL Installation with Handy DIY Accessories:

Looking to extend the reach of your system? We’ve got you covered with additional line sets and couplers that let you connect up to three lines, extending up to a maximum of 75 feet. To give your setup a smooth, polished look while ensuring everything is secure, check out our line covers and condenser wall bracket. These accessories not only enhance the appearance of your space but also ramp up the convenience and efficiency of your MRCOOL Mini Split system. Plus, you can easily buy these DIY accessories whenever you need them!

If your installation includes ceiling cassettes or a combination of wall-mounted units and a ceiling cassette, don’t miss our detailed guide on installing ceiling cassettes. It’s packed with instructions and tips to help you get the job done right.

Here's the updated table with the products and images:

This list is from the FrosthubUSA website for Mr. Cool Mini-Split accessories tailored for DIY systems:

Product Name	Product Price	Description	Image
MRCOOL DIY Mini-Split Pre-Charged Line Set	$247	Pre-charged line sets for easy installation, includes refrigerant.
MRCOOL Coupler Kit for DIY Line Set	$425	Durable couplers for quick, secure connections of line sets.
MRCOOL Line Set Cover Kit	$137	4.5-in wide, 12 ft length covers for protection and neat installation.
MRCOOL Condenser Wall Bracket	$127	Wall brackets to elevate and support the condenser unit.
MRCOOL Mini-Stat Smart App Controller (Battery Operated)	$168	Smart thermostat for temperature control via an app.
MRCOOL DIY Cleaning Kit	$117	Comprehensive cleaning kit for DIY maintenance of mini-split systems.

Frequently Asked Questions (FAQs)

Q1: Does MRCOOL come with electrical wiring?

Yes, all MRCOOL DIY® kits include a 25ft DIYPRO™ communication cable.

Q2: Do you have installers? Where can I find a technician to work on my unit?

You can locate an installer using the map on our MRCOOL installer map website. If none are nearby, any HVAC professional can help.

Q3: What size electrical wire do I need for my unit?

The required wire gauge is stated in the unit's installation manual. Note: power cables for Mini Split aren't provided.

Q4: Do I have the latest Installation manual?

Manuals are updated frequently. Check the version date on our website for MRCOOL manuals to ensure yours is current.

Q5: What is the rule of thumb for mini split sizing?

Multiply the square footage covered by your indoor units by 20 to determine your BTU requirements.

Q6: What happens if you oversize a mini split?

An oversized mini split system could result in short cycling due to rapid heating or cooling.

Q7: How far off the wall should a mini split be?

A mini split air conditioner should typically be installed at least 12 inches (30 cm) away from the wall for optimal performance, and minimum 5 inches away. It's also should have 20 inches of overhead clearance. This is to ensure sufficient airflow around the unit and to facilitate maintenance work.

Q8: Should I leave my mini split on all the time?

Continuous operation of your mini split can lead to better efficiency and more consistent temperatures.

Q9: How many hours does it take to install a mini split?

Installation typically takes 4-6 hours, depending on the number of indoor units.

Q10: Do you have to pull a vacuum on a MRCOOL mini split?

No vacuuming is required as the system's lines come pre-charged.

Related Content

• MRCOOL Line Set Guide: Simplify Installation, Maximize Comfort

• Mastering MRCOOL Capacity: BTU Explained for Optimal HVAC Performance

• MRCOOL DIY Mini Split Sizing Tips: Optimal Efficiency & Comfort