Published at Tuesday, March 26th, 2019 - 23:55:11 PM. wiring. By Pierrette Poulain.
The next control is the pressure control. The pressure control is a switch that, when working as a high-limit safety, opens on pressure rise. The switch can be either a micro switch or a mercury switch. The pressure control is wired in series with the LWCO, the rollout switch, and the spill switch. There are a few things to remember about pressure controls. First, the cut-out pressure should never be set higher than 2 psi. This is plenty of pressure for most residential one-pipe gravity systems. Higher pressures are inviting problems.
That’s it! In a future column we’ll close this chapter with Les Paul master wiring #3. Meanwhile, we’ll tackle a different guitar mod next time. Until then … keep on modding!
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