Courtesy of Emerson So much of what manufacturers do with modern compressors seeks to make them more efficient with better ability to load match, hopefully without reducing ruggedness. The Copeland Scroll Digital™ or Digital Scroll is one design that has become very popular due to its simplicity and versatility. But before we go further, let's […]

Double traps are no good. That's the end of this tech tip. Okay, here's some detail: Anytime your drain goes up and down more than once, you have a double trap UNLESS you place an air vent between the two traps that vents ABOVE the drain inlet. The double trap causes drainage issues because air […]

We have discussed many methods for checking a refrigerant charge without connecting gauges over the last few years. Recently, I've been thinking about the “approach” method of charging that many Lennox systems require. What is the Approach Method? The “approach” simply refers to the temperature difference between the liquid line leaving the condenser and the […]