MRCOOL DIY Direct — Mini Split Installation (Step-by-Step)
1 Operation: Mounting Plate Installation
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
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
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
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
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
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
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
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.
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