14 June 2002
EXAMPLE DRAWINGS CHECKLIST
E-1. PURPOSE. The drawings checklist provides the solar system designer, project
manager, and quality assurance personnel with a list of those items that are called out
by the guide specification to appear on the drawings, or are strongly suggested based
on previous experience with solar system design problems. The designer is
encouraged to annotate the drawings in any way seen fit to ensure that design changes
are properly accounted for, to provide a record of system settings and performance
criteria, and to ensure that important details not be overlooked during construction. An
example of the latter would be noting that the reverse-return piping be constructed as
shown for flow balancing purposes. Under this arrangement, some of the piping may
look unnecessary. In the past, such piping has been altered or eliminated by the
contractor, resulting in a system that could not be balanced. After a few years, the
designer's drawings are often the only existing record of the intended system design
and performance expectations. The following items should be included as part of the
a. System Schematic (No Scale). The system schematic should closely
resemble the schematic in Figure 3-1 or Figure 3-2. The main job-specific item to
develop is the collector array layout. The collector array layout will be in accordance
with the guidance defined in Chapter 4 and as a minimum define the proper layout,
number of collectors, bank sizes, rows (if applicable), and required fittings. The job
specific system schematic will include the following:
Note the collector parameters around which the system was designed:
(a) Collector net aperture area.
(b) Collector fluid volume.
(c) Collector gross dimensions (length, width, and thickness).
(d) Collector design flow rate (CFR, recommended by manufacturer).
(e) Pressure drop at design flow rate.
(f) Internal manifold diameter.
Note the following system parameters:
(a) System calculated net aperture area.
(b) System (collector loop) flow rate required (AFR = CFR x Number of