Vertex
Solar™ Pool & Spa Heating System
-- Installation & User Manual
© Copyright 2021 Optex Solar Pty Ltd. All rights strictly reserved.
Page 16
16
Roof Attachment Options
16.1
Tile Roof Mounting Frame
Note the high thermal contraction and natural relaxation of HDPE
: Collectors will contact (in
length) by up to 10mm over time and 12mm thermally across temperature extremes.
Hence
any fixing means must account for an ultimate contraction of 22mm in length per panel.
Key design principles when choosing a roof mounting means:
1)
Consider the high thermal contraction of HDPE
2)
Panels should be as low down on the roof as possible to prevent the wind from
catching the underside of panels
3)
The stainless steel straps must allow for thermal movement of panels.
For tile roofs we recommend using a minimum roof hook spacing of 600mm in the top and
bottom row. Depending on your wind loading (see “Wind Proofing” section), ang
le of install
and the dead weight of the collectors, you may require a higher density of roof hooks and/or
a stronger Aluminium L-angle, if unsure please seek advice.