STIEBEL ELTRON SOL 25 PLUS - Manual (Page 16)

16 | SOL 25 PLUS WWW.STIEBEL-ELTRON-USA.COM
Fastening To Structures
The type of roof or wall is a crucial factor in
the choice of fasteners. Remember to take
the static and dynamic (live load) forces into
account.
The 45° vertical mounting racks can develop
significant pull-out forces under heavy wind
conditions; therefore it is important to take
wind loads into account.
Force data for each collector:
Mounting ht. Shear Force Tensile Force
Up to 26 ft.
(8m)
470 lbs.
(2.1 kN) 250 lbs.
(1.1 kN)
Up to 65 ft.
(20m)
790 lbs.
(3.5 kN) 700 lbs.
(3.1 kN)
To handle shear forces along the fastening
surface, 6 fasteners over which the shear
force is distributed are recommended.
To handle tensile forces perpendicular
to the fastening surface, 6 fasteners over
which the tensile force is distributed are
recommended.
For anchoring in concrete, use six M8 UPAT
Multicones or SM M10 anchors, both of
stainless steel, per collector.
For anchoring in wood, use six wood screws
in accordance with DIN 571, at least 10 x 80,
of stainless steel, per collector.
5.1.2 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. If multiple wall-mounting frames are
being set up next to one another, use frame
connector (splice) kits (SFC001) to join them.
Line up the mounting supports with a string
so that the mounting frames will be aligned
properly.
2. Fasten the wall mounting supports to the
wall in a suitable manner, using the holes in
support riser (SE45-110R), then tighten all
bolts and screws.
3. Maintain the spacing between connection
points (as specified by the manufacturer).
4. Low elevation mounting configurations
may be prone to damage from falling
At least 25 ft. (7.6 m)
Array spacing for 45° Vertical Mounting
on a flat roof or ground.
Figure 12: Recommended row spacing for 45° vertical arrays for latitudes up to 50°.
Figure 13: Recommended row spacing for 45° horizontal arrays for latitudes up to 50°.
At least 14 ft. (4.0 m)
Array spacing for 45° Horizontal Mounting
on a flat roof or ground.
ice or nearby vehicles or other hazards.
Appropriate precautions should be taken to
mitigate these hazards.
5.1.3 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.