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2.0
Installation of solar collector
Structure
The collectors may only be mounted on sufficiently
load-bearing roof surfaces and substructures. It is
essential that the structural load-bearing capacity of the
roof and the substructure must be assessed before
mounting the collectors. Particular attention should be
paid to the quality of the (timber) substructure in terms
of the stability of the screw joints necessary for installing
the collector mountings. Anchor screws must be bolted
into support with a minimum depth of 150mm.Where
roof structure is not strong enough, noggins must be
inserted to accept anchor screws.The roof structure
must be able to take the wind and snow loads that can occur.
(Note: 1m
2
powder snow ~ 60kg / 1m
2
wet snow ~ 200kg).
The assessment should also take into account any special
features of the particular site that could lead to increased
loads (air jets or eddy formations, etc).There must be at
least 1m distance from roof ridging or edges.
Lightning protection / Equipotential bonding of
the building
It is not necessary to connect collector arrays to the
lightning protection of the building. For installations on
metal substructures at the installation site, authorised
lightning protection specialists must be consulted.The
metal pipes of the solar circuit must be earth bonded
to the main earthing circuit by means of a conductor
(green/yellow) with a cross-section of at least 6mm
2
.
8
Solarflo - Solar Thermal Domestic Hot Water System
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