4
Important Installation Information
Envirosun AS Installation Manual Rev1a PVNW.docx
Page 11
4.4
Pressure Reducing Valve
Where the mains water supply pressure is likely to exceed 550 kPa at any time, a 500kPa
pressure reducing valve that complies with AS1357 must be fitted to the inlet of the hot
water system.
This is essential to safeguard the appliance and ensure correct operation.
A breach of this requirement may void the warranty in the event of damage caused
by excessive pressure.
4.5
High wind or cyclonic areas
The standard mounting system is sufficient for mounting most standard roof installations
of either metal or tile roof construction. It may be necessary to use the cyclone mounting
system if one of the following applies:
The collector must be installed 1m (recommended) to 0.5m (minimum) of a roof
edge or peak.
The installation has minimal shielding from surrounding buildings and trees, or is
located on a hill or similar locations that may cause high wind effects (refer to
Terrain Categories, Topographic Effects & Shielding Factors in AS 1170.2: 2002,
or consult a structural engineer).
The installation is on a roof with a pitch greater than 30°.
If the solar water heater is installed in an area classed as Cyclone Region C or D
according to AS 1170.2: 2002, the standard mounting systems must not be used.
Please consult a structural engineer for advice on ensuring the installation will
comply with local building codes and regulations.
4.6
Piping material
Conergy recommends the use of copper pipe, certified to AS1432 Class C, for use in the
flow and return lines to the solar water system.
Plastic piping is not to be used for any portion of the water heater system plumbing
unless the pipe manufacturer has rated it for temperatures up to 99°C and a minimum
water pressure of 600kPa at these temperatures.
4.7
Supplementary heat sources
If a supplementary heat source is connected to the storage tank, the maximum energy
input cannot be more than 10 kW, including the electrical element. Where greater input is
required, a pressure and temperature relief valve with a higher kW rating is to be fitted to
the storage tank.
Where stove coils are used for supplementary heating the water must be connected in an
open vented manner. Refer to Australian Standard AS3500 for more details on
acceptable connection solutions.
Any supplementary heat source must be limited such that the maximum tank temperature
is 80 °C.
