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4.2 Collector Tilt
Optimal annual efciency is achieved by tilting the
solar collector at an angle that equals your latitude
plus an additional 10°. This tilt angle favors the lower
winter sun when collector performance is at it’s lowest
and minimizes overheating during the hottest summer
months.
The solar collectors in a two collector staggered
mount installation must be spaced far enough apart to
prevent winter shading. Figure 2 and Table 1 show the
correct spacing between collectors to prevent shading
on December 21, when the sun is at its lowest angle.
4.3 Basic Mounting Procedures
The Rheem solar collector in your Rheem solar
system can be mounted in either a vertical or
horizontal orientation on the roof (See Figure 1).
Although the collector is protected from freeze
conditions by the glycol HTF and does not normally
need to be drained, it is still important to slope the
collectors just slightly to allow for complete drainage
if necessary. The recommended slope is 1/4" per foot
of horizontal run.
To ensure proper water drainage from the glazing
the collectors must maintain a minimum angle from
horizontal of at least 10°. Never mount the collector
directly or parallel to a at roof surface. Use "Solar
Strut" tilt mount kits to rack the collectors to the
proper angle.
The collector should be mounted as close to the
storage tank as possible to minimize heat loss in the
piping runs. If the home has attic access, mounting the
collectors near the roof peak provides for additional
fig.5
COMPOSITION SHINGLE MOUNTING