Published at Tuesday, March 26th, 2019 - 14:51:01 PM. wiring. By Olympe Leclerc.
Last week we discussed the basics of gas boiler wiring and wiring in general. Now let’s add safety and limit controls for each type of system. I’m going to start with a steam boiler, since it is the least complex and the easiest to understand. A steam boiler uses a pressure control that opens on pressure rise and a low water cutoff (LWCO) that opens when the water drops below a predetermined level. First let’s talk about LWCOs a little. There are two types of LWCOs, float types and probe types. The float type is installed in a water column (on residential boilers, usually the gauge glass); a float opens and closes a switch as the water level changes. The probe type installs into the boiler water and uses the water in the boiler to close the circuit.
But you can also choose a more radical configuration. For instance, how about a very small 6800 pF silver mica cap for the bridge pickup—thus converting the bridge tone pot into a “warmth control” that will yield a super-sharp, contoured solo sound—in combination with a 0.033 µF paper-in-oil cap for the neck pickup. The latter would let you dial in deep, classic jazz tones or a warm rhythm sound. You can have a lot of fun experimenting to find a combination that works best for you. Another benefit of this wiring is its “preset” function. You can dial in two completely different tones, as in the example above, and engage either with only a flip of the 3-way pickup selector switch.
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