Rheem Premier Hiline Owner's Manual And Installation Instructions page 21

RAIN WATER TANK
If the solar collectors and solar pipe work are to be installed on a section of roof which is part of a rain water
runoff collection system, then it is recommended this section of roof and its gutter be isolated from the rain
water collection system. The gutter should be isolated to a width greater than the solar collectors and pipe
work and must have suitable drainage. The installer should ensure in the event of a leak from the solar
collectors or pipe work, a rainwater tank cannot be contaminated with closed circuit fluid.
While the closed circuit fluid is non toxic to humans, it does have an adverse effect on water stored in
rainwater tanks. It can cause an unpleasant odour to develop, render the rainwater foul and unfit for human
consumption and result in the rain water tank having to be drained and cleaned.
The section of roof and gutter should be isolated from the rainwater collection system before the
commissioning of the solar water heater, so that any leak or spillage during commissioning does not make its
way into the rainwater tank.
This section of roof and guttering can be isolated by either:
blocking this section of gutter from the remaining gutter and fitting two separate down pipes, one to take
any run-off water from that section of roof away to drain and the other to the rainwater collection side of
the gutter to take the rain water runoff to the rain water tank.
blocking this section of gutter from the remaining gutter and fitting a tube or pipe of a material
compatible with the gutter material in this section of the gutter and penetrating the separation pieces at
either end to allow rainwater runoff to pass from one part of the rainwater collection system to the other.
It may be necessary to fit a down pipe to the section of blocked gutter to take any run-off water from that
section of roof away to drain.
installing a false gutter inside of the existing gutter, with a down pipe penetrating the existing gutter to
take any run-off water from that section of roof away to drain. The false gutter should be no deeper than
half of the depth of the existing gutter, so as to enable rain water runoff to flow under the false gutter.
installing a flashing from the underside of the roofing material, with a continuous fall, to over the outside
lip of the gutter. The flashing should extend wider than the collectors and pipe work and turned up at the
ends so if there is leakage of closed circuit fluid, it cannot enter the gutter.
If any of these solutions are not practical, then the installer should discuss alternative options to suit the
installation with the house holder. Any alterations to the roof drainage system must comply with the relevant
building regulations, codes and Standards.
21
INSTALLATION