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When installing a collector that will be raised and not flush to the roof, the increase in wind stress at the
mounting points must be considered. Consult local wind load requirements.
Use larger stainless steel lag bolts to fasten the collector feet to a flat roof. If standing water may gather
on the roof around the collector, ensure that all mounting and plumbing holes are thoroughly sealed and
waterproofed.
Ensure the structure’s surface is solid and able to withstand in excess of 150 kg / 330 lbs of pull force that
may be encountered during high winds. Consult a structural engineer if in doubt.
B. WALL MOUNTING
Wall attachment methods depend largely on wall material. For brick or concrete walls, secure collector
feet with stainless steel expansion bolts. For wood or synthetic boarding, stainless steel screws that can
penetrate into the wall framework may be suitable for mounting. If the strength of these screws is a
concern, use bolts that run directly through the wood with a large washer or metal plate positioned before
the nut.
Always consider the weight of the collector and the structural integrity of the wall before installation. HTP
requires that installations be inspected and approved by authorized building inspectors and comply with
local and state codes BEFORE commissioning the system.
Consider possible shading from eaves, particularly in the summer. Strategic shading may be included in
system design to minimize summer heat output. Another advantage of installing under an eave overhang
is to minimize snow buildup on the collector in areas with regular snowfall.
If installing on a wall such that the collector is above a walkway, please consider snow and where it will
collect when it slides off the collector.
Figure 21: Example of roof flashing
Summary of Contents for FP-26SC
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