From December 1 through December 5, R.L. Deppmann employees assembled 85 water filters in partnership with Wine to Water — a foundation dedicated to providing …
Modern Water Softeners: How Advanced Resin and Smart Controls Protect Your Mechanical Systems
The majority of building and HVAC systems today experience mineral scale build-up in their potable water as a result of “hard water”. Left untreated, scale …
Match the Steam Trap to the Control Valve Type (Part 2): Types of Traps
Which style of steam trap should I use when I have a modulating control valve? What happens if I “lift” out of a steam trap? …
Match the Steam Trap to the Control Valve Type (Part 1)
Steam heating systems are a dying breed in commercial and institutional heating systems. Engineers and contractors understand a great deal about hydronic heating systems. Sometimes, …
Happy Thanksgiving from R.L. Deppmann!
Thank you to our valued customers and industry partners for working with the R. L. Deppmann Company in Michigan and Northern Ohio! We will be …
Variable Frequency Drives (VFD) and Single-Phase Power
As a representative for Danfoss VLT variable frequency drives (VFD), we often are asked about the use of the VFD when single-phase power is the only …
How to Limit the Speed of the Pump Using a Danfoss Variable Frequency Drive
In this Monday Morning Minute, we demonstrate how to limit the speed of the pump using the Danfoss Variable Frequency Drive (VFD).
Adjusting a Variable Frequency Drive (VFD) to Over Speed a HVAC Centrifugal Pump
In past R. L. Deppmann Monday Morning Minutes, we discussed the option of a small amount of over speeding on B&G pumps in HVAC applications. …
Parallel Pumping: 2-Position Control Valves on Multiple Cooling Towers
Over the last few weeks the Monday Morning Minutes posts have looked at pumping issues with multiple condensers and pumps. One of our most-received questions …
Parallel Pumping in Condenser Applications: Automatic Differential Pressure Control (Part 3)
Chilled water condensers are normally operated as constant-flow devices and the pumps serving them are constant-speed. Why would you ever use a variable-speed drive for …