Abstract
Specifies requirements for the design and construction of solar and heat pump hot water supply systems for household premises and for commercial and industrial installations comparable with household installations, intended to deliver potable water of acceptable quality.
Scope
This Standard specifies requirements for the design and construction of solar and heat pump hot water supply systems and/or components for household premises and for commercial and industrial installations comparable with household installations, intended to deliver potable water of acceptable quality. It covers systems with a volumetric storage capacity up to and including 700 L, including solar water heaters that primarily use metallic absorber plates in the collector(s).
NOTES:
1 This Standard may be used for a range of solar water heaters that utilize primarily plastics in the construction of the absorber plate.
2 It is intended that these products be covered by this Standard or alternatively the next revision of this Standard, which will include more specific test requirements for the evaluation of the construction of such appliances.
The Standard does not apply to solar hot water supply systems for space heating, swimming pool heating or for large buildings such as multiple dwelling buildings.
NOTES:
1 The requirements of this Standard are based on systems with fixed solar orientation and inclination, but they may be applied to tracking systems.
2 Rules for the installation of household solar hot water supply systems are given in AS/NZS 3500.4.2.
Application
This Standard is applicable to the following types of solar and heat pump hot water supply systems:
(a) Solar collector with remote hot water container systems, with both components supplied as a complementary and rated system and with primary circuit piping arranged to suit site conditions.
(b) Close-coupled or integral solar water heaters.
(c) Solar-boosted heat pump water heaters.
(d) Air source heat pump water heaters.
For solar water heaters, the primary water circuit flow between the collector and the container may be either thermosyphon or forced circulation for the type described in Item (a). Supplementary water heating may be incorporated in the solar water heater system and may be either integral with the solar water heater or remote from it.
For health and safety requirements the solar water heater shall comply with AS 3498. Clauses 1.5, 1.12, 2.1 and 2.2 are not applicable to solar water heaters that do not have any supplementary heating, as is the case with solar preheaters.
History
First published as AS 2712-1984.
Second edition 1993.
Jointly revised and designated as AS/NZS 2712:2002.