Posted by Harold Kestenholz - Hydronic Network on March 09, 2001 at 17:03:32:
In Reply to: Re: harmonics in hydro-air system posted by Dave Freitas on March 09, 2001 at 16:23:43:
What your specs say is that the circulator now whizzes water around the system fast enough to take the heat away from the boiler until the water hits the high limit control. The burner then shuts off till the water is cool enough to fire again or until the thermostat is satisfied. You need to know the output of the blower unit. There is a limit of 5 fps to the speed of the water whizzing around as higher speeds erode tubes and fittings and make noise.