Curve control, Area control, Sensorless control, Remote DP sensor control. Local sensor control: the shopping cart of speed pump controls can get overwhelming. We just... READ MORE
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I’m in the middle of the series of blogs on parallel pumping. We can’t ignore the efficiency of variable frequency drives and motors when looking... READ MORE
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I hope everyone had a wonderful Thanksgiving celebration. Here at Deppmann, we are thankful for the great industry we serve and the great people who... READ MORE
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In the R. L. Deppmann Monday Morning Minutes part 1 of this series we defined diversity in hydronic systems. Part 2 introduced the sensorless pump speed... READ MORE
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The HVAC engineer or designer has many choices when it comes to the control of variable speed pumps. The traditional differential pressure (DP) transmitter near... READ MORE
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HVAC variable speed pump control does not have to be complicated. Often times a simple differential pressure sensor (DP) at the farthest point from the... READ MORE
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Photo by Radiant Shutters on Flickr On July 2, 1776, General Howe landed his fleet in New York and unloaded the first wave of 19,000... READ MORE
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In the last R. L. Deppmann Monday Morning Minutes (MMM), we introduced the basic concept of an HVAC variable speed pump control head, modeling a... READ MORE
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When we show variable speed pump curves, we also want to show the control curve. This control curve looks very similar to a system curve... READ MORE
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In the R. L. Deppmann Monday Morning Minute from June 4th we offered some tips on converting an existing over-headed constant speed pumping system to a... READ MORE
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