Document ID: chunk:federal_register_of_legislation:F2012L02125:body:0:p4
Version: federal_register_of_legislation:F2012L02125
Segment Type: other
Provision Reference: 
Character Range: 8839–11655

water delivery from 25 litres to 630 litres inclusive.
Class 3        Electric heat exchange water heaters with a heat storage volume from 45 litres to 710 litres inclusive.

      (3)          For subsection 23 (2) of the Act, this Determination does not cover:
         (a)       water heaters that use electric-resistive heating to provide less than 50 per cent of the energy supplied in a typical year (for example, heat pump water heaters and solar water heaters) when simulated to AS/NZS 4234:2008. Simulation to AS/NZS 4234:2008 must be carried out using climate zone 3 with an energy delivery of 22.5 MJ/day for an electric boosting heating unit and an energisation profile specified by the manufacturer;
         (b)       vented water heaters, with an attached feed tank, that have a hot water delivery of less than 125 litres; or
         (c)       water heaters that are not intended for electric power grid connection, including water heaters for use in vehicles and marine applications.

             Note: This subsection reflects the exclusions specified in clause 1.4 of AS/NZS 4692.2:2005.

      (4)          In this section:
a water heater is:
(a)  un-vented if the required venting to atmosphere is controlled by a relief valve; and
Note:   This is the same meaning as in subclause 1.4.26 of AS/NZS 4692.1:2005.
(b) vented if it is open to the atmosphere so that under no conditions of use can the pressure at the surface of the water be other than atmospheric.
Note:   This is the same meaning as in subclause 1.4.8 of AS/NZS 4692.1:2005.
displacement water heater means a storage water heater into which water is fed into the container displacing the hot water as it is drawn off.
heat exchanger means a system to transfer heat from a heat transfer fluid to the supply water..
      Note 1: This definition is not intended to apply to water heat exchangers in water heaters where heating of stored or supplied water is via a combustion process.
Note 2: This is the same meaning as in subclause 1.4.9 of AS/NZS 4692.1:2005
heat exchange water heater means a water heater in which potable water is heated by a heat transfer system that maintains a physical separation between a primary heat transfer fluid (which may be distilled, demineralised or potable water, specific refrigerants or chemicals) and potable water.

             Note 1: The heat transfer fluid may be heated by means such as electricity, solar, gas or other energy sources.  In most cases the primary heat transfer fluid (which stores energy) is in a container (usually vented), and the heat exchanger (which extracts heat from the primary heat transfer fluid) is usually un-vented.

             Note 2:  This is the same meaning as in subclause 1.4.8 of AS/NZS 4692.1:2005.
heat pump water heater means a water heater with