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Hard Start Kits, Types and Applications w/ James Bowman
In this episode Bryan talks with James Bowman, technical director at Rectorseal, in person at the HVAC Excellence conference about hard start kits, potential relays and more.
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What is Net Refrigeration Effect (NRE)?
Net refrigeration effect (NRE) is the quantity of heat that each pound of the refrigerant absorbs in the refrigerated space to produce useful cooling. That’s a pretty vague definition. We know that it’s an amount of heat in processes that take place within the evaporator. Still, the phrase “useful cooling” seems rather broad. Even though […]Read more
Leak Detection on Large Systems
Imagine, if you will, a 20-year-old kid. He has no formal training in the HVAC/R field, only ride along “training” and book learning as he reads along with his journeyman father with whom he's riding. One stormy summer evening, a service call comes in for an ice cream freezer down. After calling and talking to […]Read more
Why is 240V called "Single-Phase"?
Why is it called single-phase 240 when there are two opposing phases (or legs)? I wondered why we called two 120v opposing legs “single-phase 240” for years. Then someone pointed out to me that a typical “single-phase” pole transformer only has one power leg entering and two coming out. That freaked me out. How can […]Read more