There are many advantages to operating two identical pumps at the same time. This method of pumping is called either parallel or series pumping. Today …
Smart Variable Speed Centrifugal Pumps: Part 2 (Base Mounted)
Larger centrifugal pumps with horsepower over five are a great place to save energy in HVAC and plumbing systems. Historically, these larger pumps were typically …
Smart Variable Speed Centrifugal Pumps: Part 1 (Line Mounted)
This week and next we will talk about centrifugal pumps with the variable speed technology built into them. These pumps are called “Smart pumps.” Why …
B&G Systemwize: Overspeeding of Variable Speed Pumps
The term “overspeeding” in pump selection and operation is a topic of conversation in the world of hydronic design. When asked about this subject I …
How to Pick an HVAC Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors
There are times when a little more capacity or a little more safety factor is needed from a pump selection. Often, we are asked about …
Basic Centrifugal Pump Selection: Which Pump Do I Choose? (Part 2 of 2)
When looking at pumps, the one question every HVAC and Plumbing engineer will ponder is “which pump do I choose?” There are several factors that …
Basic Centrifugal Pump Selection: Which Pump Do I Choose? (Part 1 of 2)
When looking at pumps, the one question every HVAC and Plumbing engineer will ponder is “which pump do I choose?” There are several factors that …
Variable Speed Pump Control: Wheels and Ladders and Diversity
Commercial and industrial hydronic heating and cooling systems will usually have variable speed distribution pumps. There are multiple ways to identify what speed the pumps …
Variable Speed Systems: Types of Sensors (Part 2)
Last week, in part one of this series, we looked at temperature, pressure, and differential pressure sensors to control the speed of a HVAC or …
Variable Speed Systems: Types of Sensors (Part 1)
The variable frequency drive can vary the speed of the centrifugal pump from zero to speeds over the nameplate of the motor. Of course, the …