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Message
Pouring concrete AC Pads
Posted on 10/4/22 at 1:40 pm
Posted on 10/4/22 at 1:40 pm
How difficult is it to pour new concrete ac pads to replace the plastic crap while trying to keep the house connected to the outside units somehow still?
6
Posted on 10/4/22 at 1:54 pm to Chad504boy
4 boards, quick Crete, a little mesh wiring, and a leveling trowel.
Should be all you need. Oh and the ability to reconnect the ac unit you unhooked
Should be all you need. Oh and the ability to reconnect the ac unit you unhooked
Posted on 10/4/22 at 1:55 pm to Chad504boy
you want to do it without unhooking the unit? you would probably have to lift it up with some jacks and do all your work underneath it. I doubt there is enough slack in the lines to move it to the side.
Posted on 10/4/22 at 2:25 pm to Hermit Crab
quote:
you want to do it without unhooking the unit?
would be ideal. maybe if i built up high enough side stones on side to run board underneath unit while work was done underneath. The line slack would be possible issue.
Posted on 10/4/22 at 2:33 pm to Chad504boy
They make pre-cast concrete pads that you could slip under there without having to block it up very high.
Posted on 10/4/22 at 3:07 pm to Duck Island
quote:
They make pre-cast concrete pads that you could slip under there without having to block it up very high.
Precast sounds like the most likely working option.
The modern plastic or fiberglass pads are really good too if the ground is properly prepped.
Posted on 10/4/22 at 3:13 pm to notsince98
quote:
The modern plastic or fiberglass pads are really good too if the ground is properly prepped.
my shite is all leaning and doesn't look good, i guess i could take the time to block and square it up better and get some sand back around them and make it okay ish again.
Posted on 10/4/22 at 3:29 pm to Chad504boy
man... this is super risky. You bend that copper refrigerant line and you're effed
Posted on 10/4/22 at 3:36 pm to Chad504boy
quote:
How difficult is it to pour new concrete ac pads to replace the plastic crap while trying to keep the house connected to the outside units somehow still?
A nightmare unless your outside unit is a mini-split with flex lines. Anything is possible, but it would take some creativity with a hoist or jacks and some framing. I think it would be much easier and safer to slide a new composite pad than trying to pour concrete.
Posted on 10/4/22 at 5:17 pm to Chad504boy
We usually build an A frame with a pulley system and some rope.
We do it while the unit is still connected and never have bent a copper line.
But if you aren’t confident with knots and such, I’d be hesitant to attempt.
We do it while the unit is still connected and never have bent a copper line.
But if you aren’t confident with knots and such, I’d be hesitant to attempt.
Posted on 10/4/22 at 9:49 pm to Chad504boy
Man, I wouldn’t attempt that. Seems like you would be just asking for a leak or kinked tubing.
Posted on 10/5/22 at 10:50 am to Sheepdog1833
These units can’t weigh that much?
I like the a frame idea
I like the a frame idea
Posted on 10/5/22 at 1:46 pm to djangochained
quote:
I like the a frame idea
meh, just a pain in the arse if you're trying to do 3 units at once.
might just save this for winter time and disconnect them for a day or two to have someone pour the 3 slabs at once.
Posted on 10/5/22 at 4:58 pm to Chad504boy
That’s what I did. Waited for it to cool off, pumped the refrigerant in the compressor, cut both lines loose, and took it out of the way. I actually bought bags of concrete and it took lots more than I estimated. So much for my future in foundation pouring.
Anyway after the slab dried for a day, I placed the condensing unit back, changed the r/d, brazed it back together, pulled a vacuum, and released the refrig. Trimmed it up and it’s been humming along for 8 years.
Anyway after the slab dried for a day, I placed the condensing unit back, changed the r/d, brazed it back together, pulled a vacuum, and released the refrig. Trimmed it up and it’s been humming along for 8 years.
Posted on 10/6/22 at 8:56 am to UPGDude
quote:
That’s what I did. Waited for it to cool off, pumped the refrigerant in the compressor, cut both lines loose, and took it out of the way. I actually bought bags of concrete and it took lots more than I estimated. So much for my future in foundation pouring. Anyway after the slab dried for a day, I placed the condensing unit back, changed the r/d, brazed it back together, pulled a vacuum, and released the refrig. Trimmed it up and it’s been humming along for 8 years.
That in itself would cost a pretty penny to do for 3 units, much less 1, excluding pouring the new slabs, but it’s what one would have to do if there is insufficient slack in the refrigerant lines to raise the condensing unit.
Seems like there would only be enough slack if the refrigerant lines are on the outside of the exterior wall. Many, maybe most, including mine, are run through the exterior wall and through the wall cavity and have little or no slack in the refrigerant lines to prevent kinking if they were raised.
Posted on 10/6/22 at 6:24 pm to CrawDude
quote:
Seems like there would only be enough slack if the refrigerant lines are on the outside of the exterior wall. Many, maybe most, including mine, are run through the exterior wall and through the wall cavity and have little or no slack in the refrigerant lines to prevent kinking if they were raised.
That's the way my house is run; through the brick wall into the wall cavity. I have no slack in my lines. If I tried to move them more than a few inches, it would have kinked the liquid line. Since I just had 1 unit it was worth it to me.
Posted on 10/6/22 at 10:31 pm to FishinTygah84
quote:
man... this is super risky. You bend that copper refrigerant line and you're effed
More likely to crack a solder joint.
Either way, it does not end well.
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