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Reading Schematic Diagrams
Electricity for Refrigeration, Heating and Air Conditioning 7th Edition
Chapter 6 Reading Schematic Diagrams
Reading Schematic Diagrams
Upon completion of this chapter the student will be able to:• Read and interpret the schematic a dehumidifier • Read and interpret the schematic of a window air conditioner• Read and interpret the schematic of a walk-in-cooler• Read and interpret the schematic of a commercial freezer• Read and interpret the schematic of a gas furnace with a
standing pilot• Read and interpret the schematic of a small pack aged
residential air conditioner• Read and interpret the schematics commercial air-conditioning
systems with control relays
Reading Schematic Diagrams
Upon completion of this chapter the student will be able to:• Read and interpret the schematics commercial air-conditioning
systems with lockout relays• Read and interpret the schematics of two-stage heating and
two-stage cooling systems• Read and interpret the schematics of heat pumps with defrost
boards and defrost timers• Read and interpret the schematic of a commercial refrigeration
system with pump down• Read and interpret most diagrams found in the refrigeration,
heating, and air-conditioning industry
Key Terms• Balance Point• Combustion Chamber• Control Relay• Defrost Cycle• Dehumidifier• Gas Furnace• Heat Pump• Light Commercial Air-Conditioning Systems• Limit Switch• Line Voltage Control Systems• Lockout Relay• Low-Voltage Control System• Multistage Thermostat• Pump-down Control System• Set Point• Short Cycle
Schematic Diagram Design
• The schematic diagram resembles a ladder in that it is made up of two vertical lines representing the incoming electrical sources.
• The electrical source is electrical energy being supplied to equipment.• The schematic wiring diagram uses symbols to represent electrical components in the
system.
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design
Schematic Diagram Design