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Whining circulator pump
Jason_Talbot
Member Posts: 22
One of the main circulator pumps (Grundfos UPS26-99FCF) for my boiler makes a medium pitched whine ever since the system was installed. (See photo--lower of the two pumps) .The sound radiates up to the first floor and to other rooms in the basement. I do audio recording in the basement and the noise is intrusive. None of my other circulator pumps make any noise at all. The whine decreases when the switch is set to "Med" and essentially disappears when it is set to "Lo".
I am trying to decide whether it is worth replacing the pump. Any opinions? Or is it possible this is something intrinsic to the system? For what it's worth, the other circulator pump (top one in the photo) makes no noise at all.
Appreciate the help
Jason
I am trying to decide whether it is worth replacing the pump. Any opinions? Or is it possible this is something intrinsic to the system? For what it's worth, the other circulator pump (top one in the photo) makes no noise at all.
Appreciate the help
Jason
0
Comments
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Wider angle view of my system:
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Noise in circs can be from air problem, mis-applied, running off curve, restriction in the Piping, or a bearing failure.
How was the pump sized? Did the noise just startBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
thanks. noise has been present since it was installed.
system has functioned well for 3 years otherwise.0 -
thats an awful large circulator for a veissman that has the OEM low loss header.
maybe running it on low is the correct speed
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