Rheem 12104793 Installation Instructions Manual page 20

ROOF ASSEMBLY OF SOLAR COLLECTORS
Tile Roof with a flat tile profile: If the installation is on a tile roof with a flat
tile profile, the solar collectors (17) must be installed at an angle from the
horizontal to assist in rainwater runoff. The solar hot outlet side must be on
Solar Hot
the left hand side and the solar cold inlet must be on the right hand side of
Outlet
the collector array.
The top end of the solar collector on the solar cold inlet side must sit atop
the lower end of a tile lap. Measure down the roof approximately 1940 mm
from this point to determine the position of the bottom collector rail.
Ensure the end of the collector rail (1) at the outlet side (left hand side) of
Horizontal
the solar collectors is higher up the roof than the end of the collector rail at
the inlet side (right hand side) of the solar collectors by:
30-40mm
15 – 20 mm for one solar collector, or

from
horizontal
30 – 40 mm for two solar collectors, or

45 – 60 mm for three solar collectors.

This is to provide a downward angle along the top end of the collectors to
assist in rainwater runoff in order to prevent pooling.
Solar Hot
Outlet
Horizontal
30-40mm
from
horizontal
Flat Tile Profile – Collector Angle From Horizontal
Failure to adhere to this requirement may result in pooling of rainwater at
the top of the collectors. If the top end of the collector array is too close to
the lap of the tiles, there is a risk of pooling water seeping up and under the
tile lap. The rainwater runoff is to flow from left to right to reduce the risk of
Solar Hot
water working through the joints between tiles.
Outlet
15-20mm
from horizontal
ENVELOPE COLLECTORS
EXTRUDED RAIL
15-20mm
from horizontal
FOLDED TRAY COLLECTORS
EXTRUDED RAIL
20
Position top
of collector
as low as
practical
on roof tile
Solar Cold Inlet
Position top
of collector
as low as
practical
on roof tile
Solar Cold Inlet