STIEBEL ELTRON SOL 25 PLUS - Manual (Page 20)

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Figure 5.4.2: 30/60/45° Verticle Mounting Kit (Part # 560102) Componenet Listing and Assembly Example, 45° Mode
NOTICE: TO PREVENT EXCESSIVE PRESSURE DROP IN THE SOLAR
LOOP, NEVER LINK UP MORE THAN 5 COLLECTORS IN SERIES.
ARRANGE THE INDIVIDUAL LINEAR ARRAYS PARALLEL TO EACH OTHER.
Building penetrations for plumbing and mounting must not
impair enclosure integrity or functionality and must not allow
rodent or vermin intrusion. They must meet applicable codes and
National Roofing Contractors Assoc. practices. Structural members
penetrated by solar system components must not be compromised
and penetrations must meet code, particularly penetrations through
fire-rated construction. Do not reduce fire resistance below code.
Protect control sensor wiring.
If multiple arrays of collectors are being installed on a flat roof, one
behind another, the recommended spacing between them should
be:
• at least 30 ft. (9.3 m) for 60° vertical
installation,
as shown in Figure 21; or
• at least 18 ft. (5.3 m) for 30° vertical
installation,
as shown in Figure 22.
This spacing prevents excessive shading from adjacent rows for
latitudes of up to 50°. For latitudes significantly higher than 50°,
multiple rows of collectors may not be practical due to low sun
altitude angles.
Fastening To Structures
The type of roof or wall is a crucial factor in the choice of fasten-
ers. Remember to take the static and dynamic (live load) forces into
account.
The 30/60° vertical mounting racks can develop significant pull-
out forces under heavy wind conditions, particularly in the 60°
tilt orientation; therefore it is important to take wind loads into
account.
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.