AS/NZS 5263.1.2:2020
Gas appliances - Part 1.2: Gas fired water heaters for hot water supply and/or central heating
Standard provides specific requirements and test methods for gas water heaters and central heating boilers, with an energy input not exceeding 500 MJ/h, and includes types intended for the supply of hot water at a maximum temperature of 99 °C for - (a) sanitary, potable and drinking purposes; (b) hydronic space heating; and (c) a combination of Item (a) and Item (b).
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AS/NZS 5263.1.2:2020 Gas appliances Gas fired water heaters for hot water supply and/or central heating
Preface
Section 1 Scope and general
1.1 Scope and application
1.1.1 Scope
1.1.2 Application
1.2 Normative references
1.3 Terms and definitions
1.4 Test methods
Section 2 Design and construction
2.1 Scope
2.2 General design requirements
2.2.101 Covers on cold water feed tanks
2.2.102 Venting of central heating waterways
2.3 Materials
2.4 Design for assembly and installation
2.4.5 Restraint where a hose assembly is used
2.5 Design for maintenance
2.5.8 Means for gas pressure measurement
2.5.101 Collection and removal of corrosion product
2.5.102 Provision for draining
2.5.103 Drain valves
2.6 Design for operation
2.6.4 Primary guards openings
2.7 Controls and safety devices
2.7.3 Main burner shut off provision
2.7.101 Relief valves for unvented appliances containing more than 1 L of water
2.7.102 Relief devices for unvented appliances containing less than 1 L of water
2.7.103 Thermostats
2.7.104 Over-temperature cut-out devices
2.7.105 Controls for manually operated instantaneous water heaters
2.7.106 Controls for automatic instantaneous water heaters
2.7.107 Cold water feed tank overflow
2.7.108 Temperature controls for central heating boilers and combination appliances
2.7.109 Expansion vessel and pressure gauge for central heating boilers
2.8 Gas train
2.8.5 Main burner automatic shut off valves
2.9 Combustion air and flue systems
2.9.5 Design of flue connection
2.9.101 Flueing of indoor appliances
2.10 Fan assisted combustion systems
2.11 Burners and ignition systems
2.11.10 Tray type burners-turndown limits
2.12 Components
2.13 Cylinders and cylinder compartments
2.14 Markings
2.14.2 Permanent markings on appliances
2.14.12 Label on guard
2.14.14 Markings on packaging
2.14.101 Identification of connections
2.14.102 Relief valve warning notice
2.14.103 Temperature setting markings
2.14.104 Marking of cold water feed tank water levels
2.14.105 Energy label — Water heaters and combination appliances
2.15 Instructions
2.15.2 Installation
Section 3 Preliminary test — Line gases
3.1 General
3.2 Preparation for testing
3.2.101 Additional setting up for hydronic heating appliances
3.3 Gas leakage
3.4 Gas consumption
3.4.2 Determined gas consumption of permanent pilots
3.5 Gas pressure regulators
3.6 Ignition and safety shut off systems
3.6.1 General requirements
3.6.2 Additional requirements for atmospheric burners with automatic burner ignition systems not based on permanent pilots
3.6.3 Additional requirements for fan assisted combustion systems with automatic ignition not based on permanent pilots
3.7 Ignition of draped fabric
Section 4 Tests under limiting conditions
4.1 General
4.2 CO/CO2 ratio limits for any independent surface combustion burner — Underload
4.3 CO/CO2 ratio limits for any independent burner — Overload
4.4 CO/CO2 ratio limits for permanent pilots — Overload
4.5 Flame characteristics at maximum and minimum limiting conditions
4.6 Burner ignition at maximum and minimum limiting conditions
4.7 Delayed ignition at maximum and minimum limiting conditions
4.8 Reignition at turndown under draught conditions
4.9 Pilot ignition and stability at maximum and minimum limiting conditions
4.10 Burner stability when changing setting
4.11 Unburnt gas release from burner system
4.12 Blocked flueway terminal
4.13 Case pressure test
4.14 Effect of opening and closing doors at turndown condition
4.15 Sooting — Luminous effect appliances
4.16 Burner interference at ignition or during combustion
Section 5 Performance specifications
5.1 Combustion air supply
5.2 Flue operation
5.2.3 Performance with updraught, downdraught and blocked flue
5.2.7 Safety shutdown — Combustion products limits
5.2.101 Combustion products spillage device — Storage water heaters
5.3 Condensate
5.4 Temperature hazards
5.4.2 Appliance operating conditions
5.4.6 Temperature limits — Appliance safety
5.4.7 Temperature limits — Protection from contact with the heat source
5.5 Heat resistance of appliance
5.5.1 Resistance to temperatures
5.5.3 Minimum temperature requirements of heat exchangers during warming-up period
5.5.4 Maximum temperature requirements for heat exchanger materials
5.6 Durability
5.6.101 Hydrostatic cycling requirements — Water heaters and combination appliances
5.6.102 Water operated automatic gas valves
5.7 Electrical supply variation or failure
5.8 Appliance operation under linting conditions
5.9 Rain test for outdoor and room sealed appliances
5.10 Operation under windy conditions
5.11 Strength and stability
5.11.4 Hydrostatic strength
5.11.7 Attachment of primary guard
5.11.8 Strength of primary guard incorporating glass
5.12 Thermal efficiency
5.12.101 Minimum thermal efficiency
5.12.102 Maintenance gas consumption — Storage water heaters (Australia only)
5.12.103 Stratification
5.13 Vitiation and emissions
5.101 Operation of controls and relief devices
5.101.1 Drain performance
5.101.2 Over-temperature cut-out device — Water heaters
5.101.3 Temperature control — Storage water heaters
5.101.4 Instantaneous water heaters without automatic outlet temperature control
5.101.5 Instantaneous water heaters with automatic outlet temperature control
5.101.6 Relief device of unvented water heaters containing less than 1 L of water
5.101.7 Central heating boilers and combination appliances
5.102 Verification of marked values
5.102.1 Heat output
5.102.2 Water heating capacity — Instantaneous water heaters
5.102.3 Storage capacity tolerance for storage water heaters
Appendix AA (normative) Energy labelling
Appendix BB (informative) Discharge flow rate for relief device test
Appendix ZA (normative) Preliminary test methods
Appendix ZB (normative) Limiting conditions test methods
Appendix ZC (normative) Performance test methods
Bibliography
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AS/NZS 5263.1.2:2020 Gas appliances Gas fired water heaters for hot water supply and/or central heating
Preface
Section 1 Scope and general
1.1 Scope and application
1.1.1 Scope
1.1.2 Application
1.2 Normative references
1.3 Terms and definitions
1.4 Test methods
Section 2 Design and construction
2.1 Scope
2.2 General design requirements
2.2.101 Covers on cold water feed tanks
2.2.102 Venting of central heating waterways
2.3 Materials
2.4 Design for assembly and installation
2.4.5 Restraint where a hose assembly is used
2.5 Design for maintenance
2.5.8 Means for gas pressure measurement
2.5.101 Collection and removal of corrosion product
2.5.102 Provision for draining
2.5.103 Drain valves
2.6 Design for operation
2.6.4 Primary guards openings
2.7 Controls and safety devices
2.7.3 Main burner shut off provision
2.7.101 Relief valves for unvented appliances containing more than 1 L of water
2.7.102 Relief devices for unvented appliances containing less than 1 L of water
2.7.103 Thermostats
2.7.104 Over-temperature cut-out devices
2.7.105 Controls for manually operated instantaneous water heaters
2.7.106 Controls for automatic instantaneous water heaters
2.7.107 Cold water feed tank overflow
2.7.108 Temperature controls for central heating boilers and combination appliances
2.7.109 Expansion vessel and pressure gauge for central heating boilers
2.8 Gas train
2.8.5 Main burner automatic shut off valves
2.9 Combustion air and flue systems
2.9.5 Design of flue connection
2.9.101 Flueing of indoor appliances
2.10 Fan assisted combustion systems
2.11 Burners and ignition systems
2.11.10 Tray type burners-turndown limits
2.12 Components
2.13 Cylinders and cylinder compartments
2.14 Markings
2.14.2 Permanent markings on appliances
2.14.12 Label on guard
2.14.14 Markings on packaging
2.14.101 Identification of connections
2.14.102 Relief valve warning notice
2.14.103 Temperature setting markings
2.14.104 Marking of cold water feed tank water levels
2.14.105 Energy label — Water heaters and combination appliances
2.15 Instructions
2.15.2 Installation
Section 3 Preliminary test — Line gases
3.1 General
3.2 Preparation for testing
3.2.101 Additional setting up for hydronic heating appliances
3.3 Gas leakage
3.4 Gas consumption
3.4.2 Determined gas consumption of permanent pilots
3.5 Gas pressure regulators
3.6 Ignition and safety shut off systems
3.6.1 General requirements
3.6.2 Additional requirements for atmospheric burners with automatic burner ignition systems not based on permanent pilots
3.6.3 Additional requirements for fan assisted combustion systems with automatic ignition not based on permanent pilots
3.7 Ignition of draped fabric
Section 4 Tests under limiting conditions
4.1 General
4.2 CO/CO2 ratio limits for any independent surface combustion burner — Underload
4.3 CO/CO2 ratio limits for any independent burner — Overload
4.4 CO/CO2 ratio limits for permanent pilots — Overload
4.5 Flame characteristics at maximum and minimum limiting conditions
4.6 Burner ignition at maximum and minimum limiting conditions
4.7 Delayed ignition at maximum and minimum limiting conditions
4.8 Reignition at turndown under draught conditions
4.9 Pilot ignition and stability at maximum and minimum limiting conditions
4.10 Burner stability when changing setting
4.11 Unburnt gas release from burner system
4.12 Blocked flueway terminal
4.13 Case pressure test
4.14 Effect of opening and closing doors at turndown condition
4.15 Sooting — Luminous effect appliances
4.16 Burner interference at ignition or during combustion
Section 5 Performance specifications
5.1 Combustion air supply
5.2 Flue operation
5.2.3 Performance with updraught, downdraught and blocked flue
5.2.7 Safety shutdown — Combustion products limits
5.2.101 Combustion products spillage device — Storage water heaters
5.3 Condensate
5.4 Temperature hazards
5.4.2 Appliance operating conditions
5.4.6 Temperature limits — Appliance safety
5.4.7 Temperature limits — Protection from contact with the heat source
5.5 Heat resistance of appliance
5.5.1 Resistance to temperatures
5.5.3 Minimum temperature requirements of heat exchangers during warming-up period
5.5.4 Maximum temperature requirements for heat exchanger materials
5.6 Durability
5.6.101 Hydrostatic cycling requirements — Water heaters and combination appliances
5.6.102 Water operated automatic gas valves
5.7 Electrical supply variation or failure
5.8 Appliance operation under linting conditions
5.9 Rain test for outdoor and room sealed appliances
5.10 Operation under windy conditions
5.11 Strength and stability
5.11.4 Hydrostatic strength
5.11.7 Attachment of primary guard
5.11.8 Strength of primary guard incorporating glass
5.12 Thermal efficiency
5.12.101 Minimum thermal efficiency
5.12.102 Maintenance gas consumption — Storage water heaters (Australia only)
5.12.103 Stratification
5.13 Vitiation and emissions
5.101 Operation of controls and relief devices
5.101.1 Drain performance
5.101.2 Over-temperature cut-out device — Water heaters
5.101.3 Temperature control — Storage water heaters
5.101.4 Instantaneous water heaters without automatic outlet temperature control
5.101.5 Instantaneous water heaters with automatic outlet temperature control
5.101.6 Relief device of unvented water heaters containing less than 1 L of water
5.101.7 Central heating boilers and combination appliances
5.102 Verification of marked values
5.102.1 Heat output
5.102.2 Water heating capacity — Instantaneous water heaters
5.102.3 Storage capacity tolerance for storage water heaters
Appendix AA (normative) Energy labelling
Appendix BB (informative) Discharge flow rate for relief device test
Appendix ZA (normative) Preliminary test methods
Appendix ZB (normative) Limiting conditions test methods
Appendix ZC (normative) Performance test methods
Bibliography
Previous versions
AS/NZS 5263.1.2:2020
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.