If you want to know, you have to test. The professional hvacr service technician/installer uses electrical test instruments (ETIs) to diagnose, test, and measure equipment performance, controls, circuitry, and wiring.
In my previous article, I talked about the necessity of doing a complete inspection when running sales and service calls. One of the benefits of doing the complete inspection is that you normally discover additional needs and problems and, consequently, additional tasks to recommend.
At the 2002 International Air-Conditioning, Heating, Refrigerating Exposition, the Unitary Products Group of York International (Norman, OK) announced it is joining forces with Texas Instruments Sensors & Controls Group (Attleboro, MA) and Notifact Corp. (Fairfield, NJ) to give contractors what it believes to be a cost-effective and easy-to-use equipment monitoring and communications system.
If your refrigeration processes use temperature transducers such as thermocouples, resistance temperature detectors (RTDs), or thermistors, then it is important to be able to quickly see if they’re good or bad.
Ice-making technology had a far more limited presence at the 2002 International Air-Conditioning, Heating, Refrigerating Exposition (AHR Expo) than at trade shows sponsored by FMI, NRA, and IKK. But there was a certain European flair in Atlantic City at the booth of at least a couple of exhibitors in the sector.