Oscillating noise from Taco 007

Jim Eastman

Do any of you know why I would be getting an oscillating vibration type noise from a constantly operating Taco 007? I have three zones of radiant floor with each zone with a Taco circ. The radiant system is fed with a two way injection valve. The panel radiators are on a constant circulation until warm weather shutdown of the heating system. Each panel has a thermostatic valve to control the temperature in the room. The panels are Buderus radiators with diverter type valves. The panels are piped in series. The circulator that operates the panel loop is the one that keeps me awake at night with a oscillating sound. Can anyone shed some light on cause and solution for this phenomenon, please?

PS: I am a wet head and installed this system in my own home and my bride also complains about the noise!

Jim Eastman
Precision Plumbing
Boulder, CO

Jim_13

Operating Pressure?

Try lowering the operating pressure of the system. Do this one pound at a time over several days.

Luke Lefever

see if the impeller has crud in it.

A glob of solder, pipe dope, etc. throwing it out of balance.

Mark Hunt

Circulator Noise

Jim, Is there a pressure differential valve on the end of the constant circ line? If not that could definetly create some sound issues i.e. dead heading the pump.

Jim Eastman

Thanks Luke, Darin and Jim for your responses. No, Darin, there is no pressure differential valve on the constant circ lines. However, there seems to be no change in the frequency of oscillations when the thermostatic valves are wide open or closed. That may be a last resort for me to implement. I will clean out the impeller and check the volute for imbalancing debris and will lower the pressure of the system to see if that helps. Thanks, guys! I'll let you know what the results are.

Jim Eastman