Field Notes
Plain-language notes on components, circuits and how to read a schematic, written for people at the bench, not for a classroom.
Field Notes
Suction Line Accumulator Tank Function, Location, & Purpose
In this article, we discuss the accumulator tank, its function, why its used, and its location in the system. The photo below shows the inside of an accumulator tank (...
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Copper Tube Swaging and Deburring Tools!
Swaging tools are used to expand the end of a copper tube to accept the next section of tubing. This is done prior to making a permanent braze or solder connection. Sw...
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Why a Start Capacitor Fails and Testing!
The Purpose of a Start Capacitor A start capacitor can be found in the electrical compartment of most single speed heat pumps and some outdoor air conditioning units. ...
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Tips For New HVACR Instructors with Ty and Craig!
Basic Characteristics of a Good Instructor "The hardest year of teaching is the one you are currently in." - Ty Branaman Based on their experience, Ty Branaman and Cra...
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Finding an Airflow Problem using Static Pressure Measurements!
If a furnace or air conditioning system develops an airflow problem, there are several items to visually inspect. If visual inspection does not locate the issue, prope...
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ATTIC FANS! Troubleshooting Common Problems!
An attic fan is used to lower the temperature within the building shell between the roof structure and the living space. The fan's job is to pull outdoor air into the ...
Read more →Electronics, in plain language.
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