The solar hot and solar cold pipes between the solar storage tank and
the solar collectors MUST BE of copper. All compression fittings must
use brass or copper olives.
The full length of the solar hot and solar cold pipes MUST BE insulated.
The insulation must:
be of a closed cell type or equivalent, suitable for a solar water
heating application and capable of withstanding temperatures of up to
150°C, which may be generated by the solar collectors under
stagnation conditions.
The specification of the chosen insulation material should be checked
with the insulation manufacturer prior to installation as different
materials may vary in temperature tolerance.
be at least 13 mm thick, however thicker insulation may be required to
comply with the requirements of AS/NZS 3500.4
be weatherproof and UV resistant if exposed
extend through any penetrations in the eaves, ceiling and roof
cover valves and fittings in the solar hot and solar cold pipe work
be fitted up to and cover the connections on both the solar storage
tank and the solar collectors.
Note: Failure to observe these requirements increases the risk of
freeze damage.
Uninsulated pipe work, including concealed in cavities and roof spaces or
where it may be in contact with a metal roof, may lead to freeze damage.
The system has NO WARRANTY for freeze damage if the solar hot and
solar cold pipes are not insulated in accordance with the installation
instructions.
The insulation is essential to assist in providing freeze protection, will
offer corrosion protection to a metal roof against water runoff over the
copper pipe, assist in avoiding accidental contact with the solar pipe work
as high temperature water can flow from the solar collectors to the solar
storage tank and also reduce pipe heat losses.