8
5. Use 95/5 or 60/40 lead free solder for the collector piping because of the high
temperature stagnation of the unit.
6. Keep the collector covered during installation. Even early morning sun can quickly
heat up the absorber. It is most important that the unit be vented to the atmosphere
before and while being filled. It is recommended that the collector be filled before
soldering the return piping to the collector outlet, or open the pressure relief valve or
open the boiler drain on the return line, or in some other fashion make sure the unit
is vented to the atmosphere.
Failure to follow these instructions will
void the
warranty and could damage the unit
.
7. The collector should stagnate wet (filled) during times of non-use, except during
severe winter conditions where temperatures are below 10
0
F. Under these
conditions the collector and the solar loop piping should be drained.
8. Remember, the collector can easily produce 180°F to 200°F water during clear,
sunny weather.
VI. COLLECTOR
ORIENTATION
The installation site of the collector should be chosen so the unit receives maximum solar
exposure. It should never receive more than 10% shade on the collector absorption surface
between 10:00 a.m. and 3:00 p.m. The location should be as close as possible to the
conventional water heater to minimize the piping run, which should not exceed 75 feet.
For optimum performance in the northern hemisphere, the collector should face due south.
Slightly decreased but good performance can be expected from a collector facing within 45
0
of
due south. In the southern hemisphere the opposite direction, due north, is faced for optimum
performance.
The unit tilted to local latitude in Sunbelt areas will produce the best overall performance. (This
rule of thumb should also be followed for installations in tropical zones such as the Caribbean).
Increasing the tilt 10
0
to 15
0
in the Sunbelt will improve winter performance. In areas above the
Sunbelt, the tilt for best year round performance is latitude plus 10
0
to 15
0
. These parameters
are valid in both northern and southern hemispheres.
VII. COLLECTOR
MOUNTING HARDWARE OPTIONS
There are three mounting hardware options.
Adjustable Tilt Mount (
Drawing B)
Fixed Mount (
Drawing A)
Flush Mount (
Drawing C)
Choose the hardware system best suited for the particular installation.
The chart on page 11, “Mount Dimensions and Angles
”
gives the tilt angle of the collector for
the various Standoff lengths that are used with the Tilt Mount hardware. The chart also gives
the width distance between roof penetrations for the Fixed and Flush Mount sets.
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