Eco Online™ Solar Pool Heating System -- Installation Manual
© Copyright 2012 Optex Solar Pty Ltd. All rights strictly reserved.
Page 17
16.8
Plumbing Configurations Not Recommend
17
Roof Attachment Options
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 should not be used to support loads, only as security against
excessive wind speeds.
To make sure all air bubbles are evacuated upon filling collector
MUST
be installed
with a minimum recommended pitch of 5˚.
Ideally the collector array top header pipe should have
a 1 to 2°
upward slope toward
the outlet. This is to make sure all air is automatically removed from the entire array
upon filling.
