I see a lot of techs and installers use tape over foam tubing insulation joints (Rubbatex, Armaflex, etc.) rather than using the glue that is designed for it. Some of them use tape because they don't know the glue exists; some use tape because it's what they happen to have on the truck, and others […]

This tip was a COMMENT on the sensible heat ratio tip left by Jim Bergmann. As usual, Jim makes a great point; once you get the “sensible” capacity for a piece of equipment at a set of conditions, you can easily calculate a true target delta T. Another interesting thing you can do is use […]

In most cases when a low voltage circuit blows a fuse, it's because one of the circuits is shorted to ground or common—rubbed-out wires, shorted components or boards, etc. Less commonly, you will see the low voltage circuit draw high amperage because of magnetic solenoids that are energized, but the mechanical pin, stem, or armature […]