Document ID: chunk:federal_register_of_legislation:F2022C00033:front:0:p5
Version: federal_register_of_legislation:F2022C00033
Segment Type: other
Provision Reference: 
Character Range: 10579–13392

Low Temperature Operation Penalty specified in AS/NZS 5125.1:2010 and AS/NZS 4234:2008 Amendment 1.
           h. The modelled lengths of piping shall be based on the following:
              i. For a pumped circulation system, the length of pipe between the storage tank and the closest corner of the solar collector array shall be the manufacturer's specification or 10 m (each way), whichever is the larger.
              ii. For a pumped circulation solar preheat tank, the length of piping between the pre-heat tank and a separate series auxiliary booster shall be the manufacturer's specification or 5 m, whichever is the larger. If the auxiliary booster is integral with the pre-heat tank, then the actual pipe lengths shall be used.
              iii. For a thermosiphon solar preheater, the length of piping between the preheat tank and a separate series auxiliary booster shall be the manufacturer's specification or 10 m, whichever is the larger. If the auxiliary booster is integral with the preheat tank, then the actual pipe lengths shall be used.
              iv. The diameter of all connecting piping shall be equal to the manufacturer's specifications.
              v. If manufacturer's specifications for the thermal conductivity of the pipe insulation are provided for the small SWH or ASHP, then those specified values are to be used. If no such specifications are provided, then the default values of 0.06 W/(m K) shall be used for closed cell foam insulation and 0.1 W/(m K) for rubberised insulation or polytube or fibre insulation.
           i. All other input parameters and control strategies must be those used in the actual small SWH or ASHP.
           j. Input parameters and control strategies are subject to modification by Division C of this Part.
3. For:
           a. Small SWHs (other than gas boosted SWHs) and ASHPs, subtract the total annual auxiliary energy use for the small SWH or ASHP, calculated in step 2, from the energy use of the reference electric water heater in AS/NZS 4234:2008 supplying the same load (Table A10 AS/NZS 4234:2008) to determine the displaced energy.
           b. Gas boosted SWHs, use Appendix G of AS/NZS 4234:2008 Amendment 1 to determine the displaced energy.
4. Convert the displaced energy to MWh/y.
5. Multiply the displaced energy in MWh/y by 10 to determine the 10 year MWh savings.
6. Round down the 10 year MWh savings to the nearest lower whole number.
 6A. If the small SWH or ASHP was installed on or after 1 January 2022:
           (a) multiply the number worked out under step 6 by the factor specified in the following table for the year in which the small SWH or ASHP was installed; and
           (b) if the result is not a whole number—round down the result to the nearest lower whole number.

              Note: Step 6A