Thirty-two years after ECM (electronically commutated motor) technology was introduced to the residential and light commercial HVAC industry, the indoor blower motor segment of this industry is now almost completely converted from PSC to ECM. Interestingly enough, the first application for ECM in the HVAC industry was also the indoor blower motor. The constant air-flow “variable speed” indoor blower motor was introduced by GE* in 1987.
A common misconception about EC indoor blower motors is that they all maintain airflow and solve airflow issues such as undersized ductwork and/or dirt load on the air side components. In part one of this article (see June 2020 issue of RSES Journal), I explained that there are actually two different types of EC indoor blower motors, constant airflow and constant torque.
In Parts 1 and 2 of this series (published in the June and August 2020 issues, respectively, of RSES Journal), I discussed how to adjust airflow and the airflow performance characteristics of EC indoor blower motors. The information in those articles can also be used for diagnosing operating ECMs that exhibit airflow related issues.
Your goal in “repair mode” is to restore the equipment to full and safe operating conditions. What harm could there be in using any “equivalent” induced draft blower?
A few decades ago, residential furnaces were simple but inefficient. Now, they're more complex, thanks to components like the draft inducer blower. Find out how higher efficiency standards made this piece of equipment a vital part of modern home HVAC systems.
Draft inducer blowers are original equipment manufacturer (OEM) replacements in furnaces and water heaters. Because draft inducer blowers are considered critical components, they should never be a randomly selected replacement part. Find the correct HVAC replacement part with our Draft Inducer Blower Cross Reference Guide.
This guide will help technicians in residential and commercial HVAC understand basics of both Permanent Split Capacitor (PSC) Motors and Electronically Commutated Motors (ECM).
This guide to HVAC electric motors reviews the three critical elements – application, characteristics, and types, which are vital to selecting a correct replacement motor.
Review how to use a PSC motor nameplate, measurements of the motor’s dimensions and questions about application usage to find the correct PSC replacement motor.
For HVAC companies, your trucks are basically your storefronts and represent your brand. Having all the necessary tools and resources available from your trucks will not only make the job easier for your service technicians but also increase your bottom line. One of the best ways to optimize your trucks is to reduce the HVAC inventory that they carry day to day.
Genteq® Evergreen® EM and VS motors replace millions of OEM ECM indoor blower motors. Carrying Evergreen® motors means you get the job done in one call while lowering your inventory, saving time and money.
What is an Original Equipment Manufacturer (OEM) part and when is a universal part a better option for HVAC technicians?
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