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Heat pumps
In the entry about the noisy heat pump I notice that the pump is rigidly
mounted (with bands) to a 90 degree plate that is fixed to a concrete wall. The plumbing is flex so it should not be the problem, but the mounting sure is. If it were mine I would add at least 1/2" of soft rubber between the mounting plate and the pump motor. Additionally, I would also put that much rubber where the bands surround the pump. There does not seem to be any rigid electrical conduit involved, so if the noise should still persist then one would have to consider getting a less noisy pump. .. . . .I am not selling but when I was doing that kind of work I found the 'Bell & Gossit' pumps easiest to work on. They came with 2 bolt flanges on intake and outlet sides, and the motor was isolated from the pump scroll case itself. The pump sat in its own rubber bushed mount and the shaft connection between the pump impeller shaft and the motor shaft was indirect. Each shaft had centered on its end a plate approx 2.5" by 3/4". These two plates (one on each shaft) were inturn connected to each to each other at 90 degrees, and held in that position with 4 small coil tension springs at the ends of the plates. A nice an effective design. .. . . .Other than leaking pump seals, not very common, the other problem was with very old installations the rubber motor bushing would eventually crush under the motors weight and vibration, and then there would be vibration noise induced into the plumbing. |
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