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 …
Bell & Gossett Brings Independence to Pump Selection with ESP-Systemwize
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 …
HVAC Variable Speed Pump Control Head: Part 2
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 …
HVAC Variable Speed Pump Control Head
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 …
Converting Constant Speed Pumps To Variable Speed – End Of Curve Concerns
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 …
HVAC Centrifugal Pump – Converting Constant Speed To Variable Speed
This week a Michigan engineer contacted me to discuss the conversion of an existing and oversized constant speed secondary chilled water pump to variable speed …
Using ECM Smart Circulator Pumps in Primary Pump Applications in Hydronic Systems
Last week I featured the ECM High-Efficiency Smart Circulator Pump used in a secondary application. This week the R.L. Deppmann Monday Morning Minutes continues to …
Using ECM Smart Pumps in Secondary Hydronic Systems
This week the R.L. Deppmann Monday Morning Minutes continues to look at the application of ECM High-Efficiency Smart Circulator Pumps applied to the secondary loop …
Smart ECM Pump Applications – Variable Speed Heating & Cooling System
ECM (Electronically Commutated Motor) pumps have electronics built into them which may be used to vary the speed of the pump. If the pump manufacturer …
How Can an ECM Smart Pump Save Energy?
Pumps with ECM or Electronically Commutated Motors have the ability to vary the speed of the pump built into the motor. Can you control the …