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steve Refrigeration Basics Quiz February 15, 2022, 2:50 am
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Infrared Thermometers Can Cause Confusion
There are three reasons why I don't like infrared thermometers for many HVAC tasks. #1 – The laser is misleading The laser dot is just a point of reference, not an exact point where it is reading. Often the thermometer will read lower, higher, or over a MUCH wider area. Unless you are right up […]Read more
What does "RES" mean on a contactor or relay?
Go to your truck, pick up a contactor, and look at it closely. You may find some interesting ratings you never noticed—things like terminal ambient temperature ratings and torque specs. One reading you may overlook is the RES AMPACITY of the contactor or relay. The RES rating is the RESISTIVE LOAD AMPACITY (amperage capacity) or rating. […]Read more
The Ductless Dehumidification Conundrum
This tech tip was a COMMENT on a Facebook question about how ductless systems achieve some of their high-efficiency numbers at the expense of dehumidification. This was the question: Bryan Orr mentioned that multi-stage mini splits often do very little latent cooling (dehumidification) because on low speed the manufacturers all “let the evaporator float, which […]Read more