Arkansas HVACR NewsMagazine May 2019

S tate, National, Chapter News Tech News

The Arkansas HVACR NewsMagazine welcomes Tom Turner as a guest writer. Tom, formally of Austin Energy, has been involved with the construction industry for over forty-five years and directly involved with the Heating Ventilation and Air Conditioning industry since the mid 1970's. He is regularly featured in ACHR News writing about quality installation practices. More importantly, Tom is a close friend of an Arkansas Association friend and ally, Todd Washam of Air Conditioning Contractors of America. These relationships are invaluable to the industry and Arkansas Contractors and Technicians. Comments from Tom: “Our industry has strayed from employing engineering data to adopting rules of thumb and we must correct course. Our effort will begin with delivering as advertised performance. This will occur only with specific installation guidelines with regard to equipment installation, distribution design, transition application, duct layout and updated return flow and filter criteria. These are measures that must be identified and specification set forth…” Join Tom’s Linkin at https://www.linkedin.com/in/tom-turner- 719a8b7/ The Arkansas HVACR Association thanks the ADEQ / Arkansas Energy Office and our Host Partners

the outside of the duct in hot and humid regions of the country. This can lead to failure of product used in sealing the ducts and plenums. Contractors need to become familiar with zoning areas to match inverter delivery rather than allowing the entire duct system to modulate with inverter demand. This can solve the issues of low velocity that degrades grille performance and low duct temperatures that can affect sealing materials. When operating inverter driven equipment, contractors need to educate homeowners that much like heat pumps, we should set the thermostat, and forget the thermostat. The equipment has the ability to sense very small temperature changes that help anticipate necessary refrigerant flow to keep pace with the load on the home. This benefit has a drawback when we adjust the thermostat manually. We can demand full capacity with relatively little adjustment. If a home is operating at part load (93 percent of the time) it is easily driven to 100 percent capacity by adjusting the thermostat 3°-5°F. This practice of unknowingly driving systems to maximum capacity will negatively impact a customer’s bill. Ultimately, a properly installed inverter delivery system will save consumers money. The varied conditions and construction restrictions are the contractors’ challenge to overcome. If you take your job seriously, you understand how difficult it can be. Article furnished by Tom Turner Air Evangelist

for a successful Manual J & D, Spring 2019 class schedule.