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AS/NZS 5125.1:2010

[Available Superseded]

Heat pump water heaters — Performance assessment, Part 1: Air source heat pump water heaters

Specifies the test conditions and test procedures for determining the energy performance characteristics of single-circuit air source heat pump water heaters. It applies to both stand alone heat pump water heaters and heat pumps with the condenser integral with a storage tank.
Published: 23/12/2010
Pages: 33
Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope and application
1.1 Scope
1.2 Application
1.3 Referenced documents
1.4 Definitions
1.5 Notation
2 Test conditions
2.1 Scope of section
2.2 Test chamber
2.3 Product installation
2.4 Stand-alone heat pump operation
2.5 Sensors and measurements
2.5.1 Temperature sensors
2.5.2 Electrical power
2.5.3 Stand-by electrical power
3 Test procedure
3.1 Scope of section
3.2 Test conditions
3.2.1 General
3.2.2 Maximum heat pump operating temperature during test
3.3 Test point period
3.4 Measurements
4 Calculations
4.1 Scope of section
4.2 Selection of test point periods
4.3 Thermal capacity
4.4 Coefficient of performance
4.5 Data correlation
4.5.1 General
4.5.2 Test point data selection
5 Low temperature performance
5.1 Scope of section
5.2 Low temperature classification
5.3 Low temperature delivery test
5.3.1 Requirement
5.3.2 Low temperature Class A heat pumps
5.3.3 Low temperature operation penalty
6 Reporting
6.1 Scope of section
6.2 Product description
6.3 Data reporting
6.3.1 One minute data
6.3.2 Test period data
6.3.3 Calculated values
6.3.4 Regression coefficients
Appendix A
A1 Scope
A2 Test chamber
A2.1 General
A2.2 Air temperature and circulation
A2.3 Water properties
A2.4 Radiation
A2.5 Electricity supply
A3 Product installation
A3.1 General
A3.2 Location of temperature sensors in the storage tank
A3.3 Location of temperature sensors in stand-alone heat pump systems
A3.4 Tank mixing in stand-alone heat pump systems
A4 Measurement accuracy
A4.1 Air temperature
A4.2 Water temperature
A4.3 Calibration range
A4.4 Electrical power and energy consumption
Appendix B
Appendix C
Appendix D
D1 Scope
D2 Error in determination of thermal capacity
D3 Error in determination of cop
Appendix E
E1 Scope
E2 Principle—Measurement of air temperature
E3 Configuration of air temperature sensor
E4 Air temperature sensor time constant
Appendix F
F1 Scope
F2 Test laboratory
F3 Product description
F3.1 Photograph of product under test
F3.2 Schematic drawings of product construction
F4 Test point period average measured data
F5 Test point period calculated values
F6 Regression coefficients
F6.1 Comparison of calculated and regression values of COP and Power
F7 Low temperature operation penalty
Cited references in this standard
Heated water systems — Calculation of energy consumption
Electric water heaters, Part 1: Energy consumption, performance and general requirements
Solar and heat pump water heaters — Design and construction
Safety and public health requirements for plumbing products — Water heaters and hot-water storage tanks
Solar water heaters — Test for thermal performance — Outdoor test
Content history
DR AS/NZS 5125
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