HelioSphera HS Atlas Series, Safety And Installation Instructions Manual

Page: 12 / 51

10-SSI-001_rev.005_ENG
Page 12 of 51
PV modules are exposed to a wide range of mechanical conditions, so that surface stress
may appear. Due to the different thermal coefficient of glass and metal structures, thermal
stress can occur as a result of the module’s outdoor exposure. During mounting the following
recommendations should be followed:
1. It is strongly recommended to install HS Atlas modules in vertical (portrait) position. For
more info see next point “6.- Electrical installation”.
2. The mounting assembly and the undercarriage must be appropriately dimensioned and
adapted to the in-site environmental conditions so that the maximum
bending/deformation admitted should not exceed a specific value related to the edge
length of the module (1300 mm, respectively 1100 mm). This value is: L/100, so the
maximum bending/deformation for both edges is 13 mm, and 11 mm respectively. No
buckling/twisting of more than 30 mm across the module diagonal! This requirement is
completely fulfilled by HS Atlas modules mounting system.
3. All direct contact of the glass/solar module with metal parts of the substructure must be
prevented. This requirement is completely fulfilled by HS Atlas modules mounting
system.
4. The solar module should be run at stress and force-free conditions. This requirement is
completely fulfilled by HS Atlas modules mounting system.
5. Accumulation of water at the solar module must be prevented; might cause corrosion
on the adhesive bonding or on the PVB foil between front and back glass.
6. The specified fixation points at the approved mounting assemblies are shown in Fig. 7
In order to place the mounting rails at the right distances, HelioSphera provides a helpful
tool with 2 hooks fixed at the same distance as the Atlas module. ( Fig. 5)
Fig. 4 Interface integrated on the metallic rail of the mounting substructure for HS Atlas modules