Ask any test/balance or service technician in the hydronic HVAC world to convert PSIG to feet of head and the multiplier of 2.31 is the …
Piping Pressure Drop Correction Factors when using Glycol in Hydronic HVAC Systems
The last couple of R. L. Deppmann Monday Morning Minutes introduced the BTUH corrections required when using glycol in hydronic heating and cooling systems. …
BTUH Correction Factors when using Ethylene Glycol in Hydronic HVAC Systems
In the last R. L. Deppmann Monday Morning Minute, I provided the BTUH correction factors for propylene glycol. We don’t want to play favorites so …
Propylene Glycol BTUH Correction Factors in Hydronic HVAC Systems
We are all familiar with the BTUH formula (BTUH = GPM x ΔT x 500) used to calculate the gallons per minute (GPM) water flow …
Legionella in Service Water Heating Systems
Over the last few weeks the Monday Morning Minutes (MMM) posts have reviewed the use of tankless water heaters vs. traditional storage type water heater …
“What is Pulse Technology?” and “Why We Use it to Affect Water Quality.” – Part 3
The objective of water treatment is to:
*INHIBIT CORROSION, prevent mineral scale & control bacteria, biofilm & legionella. In this Monday Morning Minute, we will discuss the technology and the effect that pulse technology via the Griswold Wave product provides specific to corrosion inhibition.
“What is Pulse Technology?” and “Why We Use it to Affect Water Quality.” – Part 2
The objective of water treatment is to: *CONTROL BACTERIA, BIOFILM AND LEGIONELLA, Inhibit Corrosion, & Prevent Mineral Scale. In this Monday morning minute, we will discuss the technology and the effect that pulse technology via the Griswold Wave product provides specific to microbial control.
“What is Pulse Technology?” and “Why We Use it to Affect Water Quality.” – Part 1
The objective of water treatment is to: PREVENT MINERAL SCALE*, Control Bacteria, Biofilm And Legionella, & Inhibit Corrosion. In this Monday morning minute, we will discuss the technology and effect that pulse technology via the Griswold Wave product provides specific to mineral scale prevention.
Centrifugal Pump Readout Corrections – Part 1
Last week the Monday Morning Minute article outlined the procedures we use during a check, test, and start-up of a B&G centrifugal pump. After converting from field gauge readings in PSIG to pump head in feet, there are several reasons why the results may be incorrect. The speed of the motor is different than the speed of
Glycol in for HVAC Systems (Part 3) – Pump Corrections
R. L. Deppmann Company Monday Morning Minutes addressed corrections to system GPM (gallons per minute) and system friction head during the last three weeks. Today we look at the pump selection. Centrifugal pump curves and the brake horsepower required changes depending on the fluid. In HVAC design we normally assume water is the pumped fluid. There are many times when the assumption is water, since there is no fluid mentioned on the schedule, yet we find a glycol makeup unit attached to the system.