Published at Tuesday, March 26th, 2019 - 08:21:42 AM. wiring. By Natuche Adam.
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.
The HVACR Wiring Troubleshooting Trainer Program is a module designed to help teach HVACR students how to troubleshoot heating and cooling control systems. It contains an interactive computer program, instructor’s manual, student workbook, student assessment, PowerPoint presentations, and the instructions on how to build instructor and/or student hands-on trainers. This module training program covers five areas of study: symbols, sequence of operation, series and parallel circuits, relays (coils and contacts), and troubleshooting. The interactive computer program uses a basic heating and cooling control ladder wiring diagram. The module can be taught in a four-hour block time frame or spread out over the instructor’s whole lesson plan.
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