We are getting an air source heat pump. The electrician gave the concrete contractor a drawing so that the latter could build a foundation. He did that as well. According to the drawing, he placed the recess for the supply line in the front left corner. Then the heat pump was delivered and temporarily placed on the foundation; see photo. It stayed there for months. I then asked what would happen with the black component. The boss replied, "That will be inserted into the heat pump." By that point, he really should have realized that this wouldn’t work.
Now the connection was made. And what a surprise: it is not possible to position the heat pump centered on the foundation because the recess is in the wrong place. Then the electrician installed this part; see photo. I am simply appalled and the chief electrician’s reply was: "That was a communication problem. My employee installed the heat pump way too high. It will be lowered further, about 5cm (2 inches) above the concrete. Then a frame will be added around it, filled with gravel, and then it won’t be visible anymore." Am I being too demanding? It’s a miracle they even managed to anchor it so close to the edge. Will that hold in the long run? The concrete contractor is not at fault. He worked according to the electrician’s drawing.
What can I demand now? Ideally, I want them to redo the entire foundation properly. That means the electricians can't do it themselves. They could commission the concrete contractor, but I will not pay for that.
How did you install your heat pumps?
Now the connection was made. And what a surprise: it is not possible to position the heat pump centered on the foundation because the recess is in the wrong place. Then the electrician installed this part; see photo. I am simply appalled and the chief electrician’s reply was: "That was a communication problem. My employee installed the heat pump way too high. It will be lowered further, about 5cm (2 inches) above the concrete. Then a frame will be added around it, filled with gravel, and then it won’t be visible anymore." Am I being too demanding? It’s a miracle they even managed to anchor it so close to the edge. Will that hold in the long run? The concrete contractor is not at fault. He worked according to the electrician’s drawing.
What can I demand now? Ideally, I want them to redo the entire foundation properly. That means the electricians can't do it themselves. They could commission the concrete contractor, but I will not pay for that.
How did you install your heat pumps?
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nordanney29 Jun 2021 22:46rick2018 schrieb:
@nordanney why do you need two heat pumps?Two-family house – one apartment (mine) with underfloor heating and one apartment with radiators. In this case, two heat pumps make more sense (and are not much more expensive than a single large heat pump, which would have to handle a complex hydraulic system).
hausnrplus2529 Jun 2021 23:00What exactly should be sound-isolated on an outdoor unit? It makes sense with wall-mounted installations, but what about a unit on its own base?
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FoxMulder2429 Jun 2021 23:50That looks quite unusual. The screws at the edge of the concrete definitely won’t hold in the long term.
Decoupling the air-to-water heat pump is only really necessary if it is attached to the house (wall mounting or house foundation).
We also installed our air-to-water heat pump on a concrete base, which was a requirement from the manufacturer. However, the drainage is connected within the hole in the foundation. The district heating pipe comes into the air-to-water heat pump from the back. Since this hardly fits properly when positioning the heat pump and the pipe is very stiff, angled pipes like these are used.
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Decoupling the air-to-water heat pump is only really necessary if it is attached to the house (wall mounting or house foundation).
We also installed our air-to-water heat pump on a concrete base, which was a requirement from the manufacturer. However, the drainage is connected within the hole in the foundation. The district heating pipe comes into the air-to-water heat pump from the back. Since this hardly fits properly when positioning the heat pump and the pipe is very stiff, angled pipes like these are used.
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nordanney30 Jun 2021 09:51hausnrplus25 schrieb:
What exactly should be vibration isolated on an outdoor unit? It makes sense when mounted on a wall, but what about a separate base?You can hear what needs to be isolated 😉 . It works well with many units, but some can be noisy.We had ours installed on a concrete foundation with decoupling placed on top of the garage (directly next to the utility room)... we didn’t like having the unit in front of the house... no idea if it’s the best solution, but it runs quietly and works perfectly like this...
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