Where should the hydronic expansion tank be in a tall high-rise hydronic system design? In part 1 of this article, I identified the size and …
Hydronic Expansion Tank Location in High-Rise Projects (Part 1)
We received an interesting question from an Ohio engineer working on the renovation of a 30-story high-rise hydronic heating system. This engineer was looking out …
Open Cooling Tower System Pumps – Balancing the Pump Using a Drive
Open cooling tower pumps are traditionally operated as constant speed. When balanced, the extra pump head or over-heading is throttled across the discharge balance valve …
Balancing & Trimming Hydronic Constant Speed Pumps
The HVAC hydronic system is proportionally balanced per ASHRAE 90.1 energy standards. The proportional balance, when properly completed, will result in all the extra pump …
Hydronic Pump Energy Savings and Proportional Balancing Technique
ASHRAE Energy Standard 90.1 indicates the hydronic system shall have proportional balance and the pump over-heading shall be removed through speed reduction or impeller trimming. …
Sump & Sewage Applications: Choosing 3-Float vs. 4-Float Control
Commercial and Institutional control of basin mounted sump and sewage pumps does not have to be complicated. In residential systems, a small fractional horsepower pump …
Process System Pump Selection: Controls to Reduce Maintenance Time
In the last R. L. Deppmann Monday Morning Minutes I defined the difference between flat curves and steep curves in a hydronic pump selection. I …
Hydronic System Pump Selection: Flat vs. Steep Curves
An engineer in Michigan called about a large project with several pumps being selected in parallel for a plant chilled water system. He commented that …
Non-Clog vs. Vortex Impeller Choices for Sewage Pump Applications
Plumbing engineers are hired to use their knowledge to provide the right building solution for the money their client is willing to spend. There is …
Submersible Pump Application Guide: Sump, Effluent, or Sewage Pump?
Plumbing engineers understand the differences in drainage piping systems depending on the source of the fluid. When selecting the submersible pump for the building trades …