Jim Abrams, co-founder of AirTime 500 and director of Planning and Strategic Development for parent company Contractor Services, had a message for AirTime 500 members at its recent Tampa meeting: “Know your numbers.”
Wye or “star” service transformers are one and the same. The names come from the secondary winding configuration, which looks like a “Y” or three-sided star. This article deals with the secondary windings of the transformer.
The newest compressor technology usually gets the most attention. But remember this: Once a compressor is installed in a system, any further contact with the equipment becomes part of the retrofit or aftermarket sector of the industry.
You discover that a compressor is defective, but the nametag on both the compressor and the condensing unit has either been removed or is no longer readable. Knowing how compressors and evaporators are selected can help you get the right unit.
The finish line is within sight — or perhaps the starting line is a more appropriate metaphor. In any case, the HVACR program at the southeast Oakland Technical Center is scheduled to be up and running for the fall semester.