AS 1056.1-1991

1 - AS 1056.1-1991 STORAGE WATER HEATERS - GENERAL REQUIREMENTS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 APPLICATION
6 - 1.3 REFERENCED DOCUMENTS
6 - 1.3.1 Standards
7 - 1.3.2 Industrial code
7 - 1.4 DEFINITIONS
7 - 1.4.1 Electric storage water heater (hereinafter referred to as a ‚water heater™)
7 - 1.4.2 Unvented water heater
7 - 1.4.3 Vented water heater
8 - 1.4.4 Displacement water heater
8 - 1.4.5 Falling-level water heater
8 - 1.4.6 Hot-water delivery
8 - 1.4.7 Maximum water-supply pressure
8 - 1.4.8 Maximum head
8 - 1.4.9 Heating element
8 - 1.4.10 Heating unit
9 - 1.4.11 Container
9 - 1.4.12 Shell
9 - 1.4.13 Casing
9 - 1.4.14 Corset
11 - 1.4.15 Bonded coating
11 - 1.5 COMPLIANCE WITH OTHER SPECIFICATIONS
11 - 1.5.1 Electrical safety requirements
11 - 1.5.2 Requirements for gas water heaters
11 - 1.5.3 Requirements of water supply and other regulatory authorities
11 - 1.6 RATED HOT-WATER DELIVERY/CAPACITY
11 - 1.6.1 Electric water heaters
11 - 1.6.2 Gas water heaters
11 - 1.7 FACILITIES FOR MAINTENANCE
12 - 1.8 CLEANLINESS IN MANUFACTURE
13 - SECTION 2 CONSTRUCTION REQUIREMENTS
13 - 2.1 FIXING OF HEATING UNITS TO SHELL
15 - 2.2 SACRIFICIAL ANODES
15 - 2.2.1 Shells lined with vitreous enamel
15 - 2.2.2 Shells lined with bonded plastics
15 - 2.3 FITTINGS IN CONTACT WITH WATER
15 - 2.4 THERMAL INSULATION
16 - 2.5 CORSET
16 - 2.6 CASING
17 - 2.7 HYDROSTATIC OVERPRESSURE WITHSTAND
17 - 2.7.1 Electric water heaters
17 - 2.7.2 Gas water heaters
17 - 2.8 PRESSURE FATIGUE WITHSTAND (OF AN UNVENTED CONTAINER)
17 - 2.8.1 Electric water heaters
17 - 2.8.2 Gas water heaters
17 - 2.9 EXTERNAL TORQUE WITHSTAND
18 - SECTION 3 ELECTRICAL COMPONENTS
18 - 3.1 HEATING UNITS
18 - 3.1.1 Rating of heating units
18 - 3.1.2 Tubular-sheathed immersion heating units
19 - 3.1.3 Bobbin heating units
19 - 3.1.4 Heating unit support
19 - 3.1.5 Location of heating unit
20 - 3.2 THERMOSTATS AND THERMAL CUTOUTS
20 - 3.2.1 General
20 - 3.2.2 Thermostat setting
20 - 3.2.3 Immersed-probe thermostats
20 - 3.2.4 Surface-contact thermostats
20 - 3.2.5 Thermal cut-out
21 - SECTION 4 FEED TANKS AND WATER FITTINGS
21 - 4.1 ATTACHED FEED TANK
21 - 4.1.1 General
21 - 4.1.2 Materials
21 - 4.1.3 Design and construction
21 - 4.1.4 Delivery
21 - 4.1.5 Water level
22 - 4.1.6 Float-control valve
22 - 4.1.7 Overflow
22 - 4.1.8 Cover
22 - 4.2 WATER FITTINGS
22 - 4.2.1 Inside diameter
22 - 4.2.2 Materials
22 - 4.2.3 Plumbing connections to water heater
22 - 4.3 WATER PIPES
22 - 4.4 DRAINAGE FACILITIES
23 - SECTION 5 MARKING AND INSTALLATION INSTRUCTIONS
23 - 5.1 MARKING
23 - 5.1.1 General
23 - 5.1.2 Boosting unit
23 - 5.2 INSTRUCTIONS FOR INSTALLATION AND MAINTENANCE
25 - SECTION 6 DETERMINATION OF COMPLIANCE
25 - 6.1 TYPE TESTS
25 - 6.1.1 General
25 - 6.1.2 Product documentation
25 - 6.2 ROUTINE TESTS
27 - APPENDIX A - INFORMATION TO BE SUPPLIED WITH ENQUIRY AND ORDER
28 - APPENDIX B - METHOD FOR THE DETERMINATION OF HEAT LOSS
28 - B1 SCOPE
28 - B2 PRINCIPLE
28 - B3 TEST APPARATUS
28 - B4 TEST CONDITIONS
28 - B4.1 Set-up
28 - B4.2 Air temperature
28 - B4.3 Air circulation
29 - B4.4 Thermostat setting
29 - B4.5 Test voltage
29 - B4.6 Energization of heating units
29 - B5 PROCEDURE
30 - B6 CALCULATIONS
30 - B7 REPORT
31 - B8 EXAMPLES
32 - APPENDIX C - METHOD FOR THE DETERMINATION OF HOT-WATER DELIVERY
32 - C1 SCOPE
32 - C2 PRINCIPLE
32 - C3 TEST APPARATUS
32 - C4 TEST CONDITIONS
32 - C4.1 General
32 - C4.2 Installation of water heater
33 - C4.3 Insulation of fittings
33 - C4.4 Cold-water supply
33 - C4.5 Draw-off facilities
33 - C4.6 Thermostat setting
34 - C4.7 Energization of heating units
34 - C5 PROCEDURE
34 - C6 REPORT
35 - APPENDIX D - TYPICAL PRODUCT SPECIFICATION FOR A WATER HEATER

Specifies general construction and performance requirements for electric storage water heaters of 25 L to 630 L rated hot water delivery. (Requirements for gas water heaters are specified only by reference to Code AG 102 published by AGA/ALPGA.) To be read in conjunction with AS 1056.2 or AS 1056.3 as appropriate.

This Standard specifies requirements for:(a) Storage water heaters heated solely by electricity (hereinafter called 'water heaters') having rated hot-water deliveries within the range 25 L to 630 L and having heating units of the tubular-sheathed immersion type or the bobbin type.NOTES: Where non-electric supplementary heating, e.g. from a solar collector or a slow combustion stove, is used,additional requirements may be necessary.(b) Gas storage water heaters by cross-reference to Code AG 102 published by The Australian Gas Association and the Australian Liquefied Petroleum Gas Association (see Clauses 1.3.2 and 1.5.2).This Standard does not apply to heat-exchange water heaters (see AS 1361).NOTES:1. Water heaters having deliveries in excess of 630 L generally have special requirements. Intending purchasers of such water heaters are advised to include in their specification such requirements of this Standard as are relevant to their needs.2. For the installation of household type hot-water systems, see AS 3500.4.3. Information to be supplied with enquiries and orders for electric water heaters is given in Appendix A.

AS 1056.1 first published as part of AS C316-1957.
Second edition 1965.
Third edition 1970.
AS C316-1970 revised and redesignated AS 1056-1972.
AS C316-1970 withdrawn 1974.
Second edition AS 1056-1977.
AS 1056-1977 revised and redesignated in part as AS 1056.1-1985.
Second edition 1991.
Reissued incorporating Amendment No.1 (July 1992).
Reissued incorporating Amendment No.2 (December 1995).
Reissued incorporating Amendment No. 3 (August 1996).
Reissued incorporating Amendment No. 4 (January 2000).
Reissued incorporating Amendment No. 5 (September 2005).