MRCOOL DIY Direct — Mini Split Installation (Step-by-Step)

1 Operation: Mounting Plate Installation

Starts at 0:00

What to do

Mark studs, level the mounting plate, and fasten with proper anchors/lag screws. Verify clearances per MRCOOL spec.

Pro tip: pre-drill to avoid drywall blowout.

2 Wall Hole

Starts at 1:04

What to do

Drill the penetration with a slight downward pitch toward the exterior. Install sleeve if provided to protect the line set and drain.

Always check for hidden utilities before drilling.

3 Prepare Line Set

Starts at 1:26

What to do

Align the pre-charged Quick Connect® lines. Tape the drain and control cable neatly to feed through the wall.

Avoid tight bends that could restrict refrigerant flow.

4 Mount the Indoor Unit

Starts at 1:40

What to do

Guide the bundled lines through the wall, hook the unit on the plate, lock it in place, and confirm level.

Protect lines with a soft cloth while positioning the unit.

5 Install USB Dongle

Starts at 2:03

What to do

Insert the SmartHVAC™ USB Wi-Fi dongle and pair via the app (2.4 GHz). Follow prompts to connect and name your unit.

Keep your phone near the unit during pairing.

6 Outdoor Unit Placement

Starts at 2:27

What to do

Place the condenser on a level pad or wall bracket, use vibration pads, and maintain MRCOOL airflow clearances. Route lines neatly.

Keep coil area clear for optimal performance.

7 Quick Connect® Refrigerant Lines

Starts at 2:54

What to do

Attach the pre-charged fittings per procedure. Hand-tighten, then torque to spec. Open valves fully and check for leaks.

Use soapy water where applicable.

8 Operation Test

Starts at 3:46

What to do

Power on and test heating/cooling. Confirm temperature change, airflow, and condensate drainage. Verify there are no error codes.

Follow all local codes and your user manual.

▶ Watch the full installation video on YouTube

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Complete Mini Split Installation Guide : MRCOOL DIY Direct

 About MRCOOL DIY Direct Nationwide Sales Champion

MRCOOL DIY Direct provides nationwide support for MRCOOL mini splits, heat pumps, and DIY installation resources. Our learning center includes step-by-step guides, Quick Connect® tips, and SmartHVAC™ app setup.

We serve customers across the contiguous United States and major metros including New York, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, Dallas, and San Jose.