Water Pipes, Fittings And Insulation - Rinnai Enduro SP200B Installation Manual

INSTALLATION INFORMATION

WATER PIPES, FITTINGS AND INSULATION

The solar hot and solar cold pipes between the solar storage tank and the solar collectors must be
suited to the high water temperatures and pressures that may occur. As such, plastic pipe must not
WARNING be used. Components used to join pipes must use metallic materials to achieve sealing. The collector
flow and return pipes should be 15 mm copper tube.
All hot water pipework should be insulated with sealed polyethylene foamed or equivalent insulation to optimise
performance and energy efficiency, and to protect against frost damage. Such insulation may also be mandatory
under local regulations.
Rinnai recommend insulation to achieve at least the R value shown in the following table.
Location of Installation
• CER Zone 4
• Areas defined as "B or "C" in the latest version
of the Rinnai Solar Hot Water Warranty Booklet.
• Any other area prone to frost conditions.
• All other areas
With the exception of solar collector flow and return pipes, water pipe sizing should be performed in accordance
with AS/NZS 3500. All external pipework MUST be insulated to prevent frost damage.
The suggested maximum combined lengths of the solar flow and return pipes is 40 metres. Please refer to the
system installation manual supplied with the pump kit for the maximum pipe length for the specific pump kit.
All supplied insulation materials must be fitted as shown to minimise heat losses. In frost prone areas this insulation
will also protect against frost damage. If frost valves are fitted they must remain free of any insulation materials.
Frost valves must be exposed directly to ambient air conditions to ensure correct operation.
Insulation of fittings connecting
frost valve to collector. Frost valve
itself is uninsulated.
Rinnai
Pipes on Roof
R = 1.0K.m²/W
R = 0.6 K.m²/W
Insulation of cap, using insulation,
tape and cable tie.
8
Pipe between
tank and gas booster
R = 0.6 K.m²/W
R = 0.6 K.m²/W
Insulation of barrel union with,
insulation and tape
Split Collector IM