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Variable Frequency Drives (VFD) and Single-Phase Power

Norm Hall February 20, 2023 Monday Morning Minutes, Pumps, Variable Frequency Drives, Variable Speed

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 …

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danfossPumpssingle-phase powervariable frequency drive

Centrifugal Pumps: Determining Flow Rate Using Amp Readings

Norm Hall January 23, 2023 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Motors, Pumps, Pumps

We understand that the best way to determine the flow rate of an operating pump is the proper readout of gauges attached to the pump …

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Hydronic Systems Pump Minimum Flow Methods

Norm Hall January 16, 2023 Control, Minimum Flow, Monday Morning Minutes, Pumps

Minimum pump flow rate is critical to the trouble-free operation and longevity of the centrifugal pump. In the last blog we described the use of …

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Bell and Gossetthydronic systemHydronicsNorm HallPumps

Pump Minimum Flow Using a Cla-Val Back Pressure Valve

Norm Hall January 9, 2023 Control, Minimum Flow, Monday Morning Minutes, Pressure Regulating, Pumps, Valves

Minimum pump flow rate is critical to the trouble-free operation and longevity of the centrifugal pump. The pressure sustaining valve or back pressure valve is …

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Pumping From an Atmospheric Tank: Pump and Tank Control (Part 3)

Norm Hall January 2, 2023 Control, Monday Morning Minutes, Pumps, Variable Speed

Let me start by wishing everyone a Happy and Prosperous New Year. This blog begins the 14th year of the R. L. Deppmann Monday Morning …

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Norm HallPipingPumpsTanksvariable speed

Pumping from an Atmospheric Tank: Pump and Tank Piping (Part 2)

Norm Hall December 19, 2022 Monday Morning Minutes, NPSH, Pumps, Selection and Specification

What can be simpler than pumping water from an open or atmospheric tank into another tank or system? What seems simple to many opens a …

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Pumping from an Atmospheric Tank: Pump Selection and Installation (Part 1)

Norm Hall December 12, 2022 Monday Morning Minutes, NPSH, Pumps, Selection and Specification

What can be simpler than pumping water from an open or atmospheric tank into another tank or system? What seems simple to many opens a …

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Bell and GossetthydrovarNorm HallNPSHPumpsvariable speed
temperatures
temperatures

Heat Pump Water Heaters: Temperatures & Storage (Part 4)

Norm Hall August 22, 2022 Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes, Plumbing System Design, Water Heaters, Water Heaters

Commercial heat pump water heaters using R-744 (CO2) refrigerant operate best when attention is paid to the piping and storage tank arrangement. Today, in part …

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Expansion TanksNorm HallPipingPumpsTanksWater Heaters
Lemonade Stand
Lemonade Stand

Heat Pump Water Heaters: How They Work (Part 2)

Norm Hall August 8, 2022 Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes, Plumbing System Design, Water Heaters, Water Heaters

Heat pump water heaters have a place in the decarbonization efforts by building plumbing designers, contractors, and engineers. Heat pumps have been part of the …

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HVAC Hydronic SystemHVAC SystemsNorm HallPumpsWater Heaters
lightbulb
lightbulb

Carbon Reduction is the Dream. Here’s How to Make it a Good One.

Norm Hall May 23, 2022 Decarbonization, Decarbonzation, Hydronic Design, Plumbing System Design

Carbon reduction in building design is critical to the lifestyle of our future generations. Most engineers and their owner clients understand the concerns and welcome …

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Providing quality products and outstanding service to customers in Northern Ohio & Michigan since 1927.
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  • Products
    • Overview
    • Pumps and Accessories
    • Boilers and Water Heaters
    • Hydronic Systems
    • Plumbing Systems
    • Steam and Condensate
    • Variable Frequency Drives (VFDs)
    • Glycol Installation
    • Snowmelt Designs
  • System Design
    • Overview
    • Project Gallery
    • Selection and Design Tools
  • Contractors
  • Service & Parts
    • Overview
    • Startup and Warranty
    • Parts
    • Service and Maintenance
  • Education
    • Overview
    • Training Opportunities
    • Factory Classes
  • About RLD
    • Overview
    • Team Deppmann
    • R.L. Deppmann Locations
    • Careers
    • Community Engagement
    • Press and News