STIEBEL ELTRON SOL 25 PLUS - Manual (Page 18)

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5.3.1 Horizontal 45° Mounting on a Flat Roof
(Please review section 5.2.0)
1. Choose attachment site, allowing for subsequent pipe
penetration.
2. Assemble 2 triangular trusses using the 36” rails (M-203), the 51”
rails (M-202), the brackets (M-101), and the 55 mm bolts as shown
in Figure 5.3.1.
3. Bolt the trusses to the cross braces connecting the bolts as shown
in Figure 5.3.2. The resulting assembly should look similar to Figure
5.2.3. The collector frames may then be bolted to the holes in the
51” rails using the 20 mm bolts. The triangular truss assemblies
with cross braces should be attached to the center of the R2 collector
frames (Figure 5.2.5) i.e. there should be an equal amount of the
profile rail to the right and left hand sides of each of the triangular
trusses. If multiple flat-roof mounting frames are being set up next
to one another, use frame connector kits (SFC001, shown in Figure
5.2.6) to join them, as shown in Figures 5.2.7 and 5.2.8.
4. Fasten the flat-roof mounting racks to the roof in an appropriate
manner, or weight them down with at least 400 lbs. (180 kg) of
solid, dead weight (e.g. concrete slab) per collector if the installed
height is less than 25 ft (8 m). Remember to take the static and
dynamic (e.g., wind) loading into account for the roof structure.
5. For installed heights above 25 ft. (8 m), weighting is not
advisable due to the higher wind loading conditions. In this case,
the holes in the 36” rail at the base (M-203) should be used to fasten
the mounting hardware to the roof (six M6 bolts per horizontal
support).
5.3.2 Horizontal 45° Mounting on a Wall
Procedures described above for mounting of collectors upon a flat
roof apply to wall mounting, except for the following:
1. Cross braces should be attached to the 36” rail at the base of the
trusses rather than the ones at the rear.
2. Fasten the rear 36” rail of the trusses to the wall using the
mounting holes in a suitible manner.
3. Low elevation mounting configurations may be prone to damage
from falling ice or nearby vehicles or other hazards. Appropriate
precautions should be taken to mitigate these hazards.
5.3.3 Vertical 45° Mounting On The Ground
Procedures described above for mounting of collectors upon a flat
roof apply to ground mounting, except for the following:
1. Installer must ensure that the mounting foundation for the
system is not subject to movement, such as frost heaves. Therefore,
it is necessary to install footings below the frost line in locations
subject to freezing weather. If it is not possible or practicable to
avoid movement due to frost, etc., it will be necessary to provide a
floating frame that does not flex or warp the collectors’ mounting
frames if the ground shifts or heaves.
2. Ground mounting configurations may be prone to damage
from falling ice or nearby vehicles or other hazards. Appropriate
precautions should be taken to mitigate these hazards.
3. Ground mounting often requires longer outside piping runs,
so proper insulation and protection of collector piping essential.
Installers should consider laying pipe runs below grade to avoid
damage and to mark the location of these runs to avoid damage
from digging operations.
5.3.4 Horizontal 45° Mounting On A Pitched Roof
Procedures described above for mounting of collectors upon a flat
roof apply to mounting on a pitched (sloped) roof, except for the
following:
1. Use of weights to secure collectors and mounting hardware is
not advisable. Collector mounting frames should be fastened to all
pitched roofs in an appropriate manner.
2. The 45° mounting kits add 45° to an existing roof pitch, as shown
in table 5.2.9. Roofs with pitches above 9-in-12 generally should
not use this mounting kit, as the resulting collector tilt angle will be
too steep for almost any location.