Installation of Mounting Bracket for Mini Split Ductless Air Conditioner Condensing Unit

So, I am in the process of installing a new ductless mini split Pioneer air conditioner, similar to this one. One of the steps involved was to set-up these mounting brackets to the exterior of concrete foundation wall, where the condenser will be secured. Unfortunately the mounting brackets came without any installation instructions so it took a bit of figuring out. Took about an hour and it was a pretty easy job.

Tools I needed:


hammer drill
Masonry drill bit 1/2 inch size
Socket wrench with deep 17mm socket (or possibly 11/16in would have also worked)
Socket wrench 9/16 inch
Wrench 9/16 inch

1. I unpacked the brackets and laid them out. The kit included the mounting brackets, masonry/concrete expansion anchors, rubber pads, bolts nuts and washers.

Mounting Bracket for Mini Split Ductless Air Conditioner Condensing Unit 2P
Mounting Bracket for Mini Split Ductless Air Conditioner Condensing Unit 2P (For 9000 and 12000 BTU Condensers)

2. I measured the required distances from the side walls and any other objects as per condenser manufacturer’s instructions (mine was at least 12 inches away from the walls or obstructions). Then I put first bracket against the wall and mark the hole openings on the concrete.  Measured the distance between the mounting “feet” of my condenser (mine was 18 inches across).  Using a level, I drew two horizontal lines from markings I just made on the wall and marked the holes for the second bracket (18 inches away). Finally I drilled the holes using hammer drill and 1/2 masonry bit.


3. After holes were drilled, I Inserted concrete anchors in them, put up the brackets against it and tightened with provided washers and bolts using 17mm deep socket wrench (11/16 inch should have also worked but I only had metric with deep sockets).  I tightened all bolts gradually before finally tightening them firmly. Level placed across the two brackets helped to ensure  they were both plumb and level.

4. Next I secured the brackets in open position using provided bolts, plastic and metal washers (to prevent rusting bolts against metal washers) and nuts. I needed a 9/16 inch wrench for that

5. Next, using included longer bolts and washers I put rubber paddings – for now held by friction only.

6. While aligning properly, I carefully placed the condenser on the rubber pads with bolts protruding through the holes, placed metal washers, then plastic washers and finally tightened with bolts using 9/16 inch wrench, while holding the bolts with 9/16 inch socket wrench .

This part of the installation was complete and I was ready for next phase.