By Voletta Roche. wiring. Published at Monday, March 25th, 2019 - 09:46:54 AM.
Another problem I ran into with probe-type LWCOs is foaming. Remember I said that probe-type LWCOs use the water in the boiler to close a circuit? Well, if you didn’t clean the boiler water according to the manufacturer’s instructions, instead of water, you can have foam in the boiler. Oil and dirt are in the water and as it boils, it sends the water rushing into the steam pipes; what’s left in the boiler foams up and the boiler thinks it has water and keeps running. This usually leads to a cracked boiler. The moral to this story: No matter what kind of LWCO you use, clean the boiler or get the homeowner to clean it. Personally I like float types, but either LWCO works if the boiler water is clean.
He loves a rich, woody tone with nice overtones, so a certain cap from Roederstein is his standard. But he also wanted a warm, woolly tone as well as a slightly mid-scooped one, so we installed a rotary switch with his beloved Roederstein cap for the standard sound, a NOS paper-in-oil cap for the warm tone, and a standard “orange drop” cap for a slightly scooped sound. All three caps were 0.033 µF. The original Varitone design. The original Gibson Varitone design used an inductor to create a series of notch filters together with the capacitors. Personally, I think adding the inductor is not the best choice. The design may have worked in the ’50s, but today most of us are looking for different tones. (Joe described the tone of the original design in his article.)
Being able to efficiently interpret ladder (line) diagrams is an important part of electrically troubleshooting many HVACR systems. These diagrams are drawn in such a format that it is quite easy to understand the electrical configuration of the system. The ease in reading these diagrams is accomplished by drawing each load and any switches that control that load on a separate horizontal line. For example, if a load is not energized when it should, a technician should be able to easily identify which switch or switches control that load and then start to troubleshoot the cause. Ladder diagrams are also drawn with other helpful identifiers to aid a technician in electrically troubleshooting a system.
Bill Porter is an HVACR technician who became an inventor and a manufacturer because he found unitary heat pump wiring confusing, particularly for dual-fuel systems. He has been in the industry over 40 years. About 10 years ago, he decided to create a product that would help other technicians wire dual-fuel heat pumps with minimal guesswork, hassle, and callbacks. Porter said his universal wiring product is made with technicians in mind.
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