| Product Type: | Equipment Pad |
|---|---|
| Application: | HVAC |
| Dimensions: | 16" x 36" |
| Thickness: | 3" |
| Pad Type: | Concrete |

I've had two of my mini-split heat pumps leveled on pressure treated wood which sits on blacktop. They're fastened to the wood but nothing is fastened to the pavement. My guess is that a pad can sit on pavement unattached provide they not likely to be disturbed. Seems to work okay for over a year now but I considered fastening them to the pavement with some anchor bolts in case they bumped into hard enough to threaten the line attachments. I also have one on a pad resting on bare ground. No problems so far.
You could anchor it to an existing concrete slab, but it's not worth the effort, IMO. I'd say just lay it on top.
Before I answer the question I would like you to know that pads provide flat and level surface to mount condensing units over soil. It sounds like you want to mount your unit over concrete slab, so you already have a flat level surface – sounds like you don’t need a pad at all. To answer your question, yes you should anchor the pad to the slab, otherwise it will move due to vibration and put strain on the refrigerant lines – last thing you want to happen. PS, I am not a licensed refrigeration professional, I gave my opinion based on experience and common sense.
You don't have to anchor it down, just lay it as is. Sent from my iPhone
This is an awesome product but we did not use it in the way you suggest. We placed crushed limestone on the ground and anchored a whole house generator to the pad. Our airconditioning unit is also secured in that way. We are in tornado alley and had an EF 5 hit within 300 yards and everything remained anchored. That said, I think you could drill thru the pad and anchor directly to the slab with concrete anchor bolts. Don't have experience using it that way, but I think this should work. Hope that helps>
You don't have to anchor it down. Sent from my iPhone
I think that a good construction should do the trick. Keep in mind that this should also be “level” when you.re doing it