INFORMATION REQUIRED ON DRAWINGS
General. Drawings shall provide a clear presentation
of system design, and shall include items noted in project
specifications by such terms as "where indicated," "as shown,"
etc. Refer to the local A/E Guide for additional requirements.
Provide complete details of equipment, systems, and controls on
project drawings as follows:
Identification of Drawings. Ensure that the drawings
list, sheet numbers, and sheet titles on mechanical sheets match
exactly as shown on the cover sheet and in specifications.
Provide schedules of mechanical
Duct Pressure Classifications. Include duct pressure
classifications on drawings to ensure ducts meet SMACNA
construction standards. Evaluate the effect of closed fire
dampers on duct pressure when determining pressure
classification; include pressure relief devices as required to
limit pressure buildup. See Figure 10 for examples or follow
Riser Diagrams. Riser diagrams drawn to vertical scale
should be provided for mechanical systems in multi-story
buildings. These shall indicate size changes in vertical piping
runs. See Figures 38 and 39 for examples.
Controls. Include schematics (control loops) and
ladder diagrams (see Figures 33, 34, and 35 for examples),
sequences of operation, and equipment schedules (see Tables 15,
16, and 17 for examples). Include the following information to
the maximum extent possible without being proprietary:
a) The schematic should show control loop devices and
b) Schematic and ladder diagrams should show interface
points between field installed HVAC control systems, factory
installed HVAC control systems (e.g., chiller and boiler
controls), fire alarm systems, smoke detection systems, etc.
c) The ladder diagram should show the relationship of
devices within HVAC equipment (e.g., magnetic starters) and other