Rheem 12104793 Installation Instructions Manual page 25

17. Labels: At ground or floor level, above the location of the solar storage tank,
attach the 'Solar Cold Pipe' label (16) to the insulation on the solar cold pipe
to the solar collectors and the 'Solar Hot Pipe' label (15) to the insulation on
the solar hot pipe from the solar collectors.
Ensure the arrows on the labels are pointing in the correct direction of closed
circuit fluid flow.
18. Pressure Testing the Collector Circuit: Upon completion of the solar
collector and solar hot and solar cold pipe installation, it may be required to
pressure test the collector circuit. Refer to
19. Connecting the Solar Hot and Solar Cold Pipes to the Solar Storage
Tank: Refer to "Connections – Plumbing" in the Owner's Guide and
Installation Instructions supplied with the solar storage tank for details on
the solar hot and solar cold pipe connections to the solar storage tank.
20. Commissioning: Upon completion of the installation, refer to the Owners
Guide and Installation instructions supplied with the solar storage tank for
the commissioning procedure of the solar water heater.
INSTALLATION CHECK LIST
Once the installation is complete, it is important to check the following:

Maximum recommended total combined solar hot and solar cold pipe length
is not exceeded.

Solar hot and solar cold pipes are insulated in accordance with the
installation instructions.

The solar hot and solar cold pipes have a continuous fall from the solar
collectors to the solar storage tank. Horizontal runs of pipe work are
acceptable.

Ensure the collector rail is either horizontal or is higher on the hot outlet side
of the solar collectors. If in doubt use a spirit level.
Or if the installation is on a tile roof with a flat profile tile, then the end of the
collector rail at the outlet side (left hand side) of 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:
15 – 20 mm for one solar collector, or

30 – 40 mm for two solar collectors, or

45 – 60 mm for three solar collectors.

ROOF ASSEMBLY OF SOLAR COLLECTORS
"Pressure Testing"
25
on page 17.