Published at Tuesday, March 26th, 2019 - 06:25:23 AM. wiring. By Romana Maurice.
It is also a problem for manufacturers when misunderstood equipment is returned under warranty with no defect, as well as for homeowners when they don’t get the performance they expect. ”A lot of manufacturers still have a big metal box and one terminal strip with 17, 18, or even 19 wires,” Porter said. His dual-fuel control has three strips – one for the furnace, one for the outdoor unit, and one for the indoor thermostat – and the wires are clearly identified, he said.
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.
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