Engineering Fundamentals: An Introduction to Engineering, 4th ed.c

Mechanical engineers use diagrams to show the layout of piping networks in buildings

or to show the placement of air supply ducts, air return ducts, and fans in a heating or cooling

system. An example of a HVAC system drawing is shown in Figure 16.33.

For more detailed information on symbols, see the following documents:

Graphic Electrical Symbols for Air-Conditioning and Refrigeration Equipmentby ARI (ARI

130-88).Graphic Symbols for Electrical and Electronic Diagramsby IEEE (ANSI /IEEE

315-1975).Graphic Symbols for Pipe Fittings, Valves, and Pipingby ASME (ANSI /ASME

ASME Y32.2.2.3-1949 (R 1988)).

Symbols for Mechanical and Acoustical Elements as Used in Schematic Diagramsby ASME

(ANSI /ASME Y32.18-1972 (R 1985)).

684

Z

249

249

CFM PER

ROOM 6'

249

249

249

907 604

691

691

691

691

1095 397 596 397

750

560

397

907 302 302 302

725

1605

700

550

125

125

■Figure 16.33

Single-line ducted HVAC system

showing a layout of the proposed

trunk and runout ductwork.

Source:The Trane Company,

La Crosse, WI

532 Chapter 16 Engineering Drawings and Symbols

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