ANSI Z21.10.3-2017/CSA 4.3:2017

Preface
1 Scope
2 Reference publications
3 Definitions
4 Construction
5 Performance
6 Manufacturing and production tests
7 Items unique to the United States
8 Items unique to Canada
Annex A (normative) - Outline of lighting instructions for
        appliances equipped with continuous pilots
Annex B (normative) - Outline of operating instructions
        for appliances equipped with intermittent pilot
        or interrupted pilot systems
Annex C (normative) - Outline of operating instructions
        for appliances equipped with direct ignition
        systems
Annex D (normative) - Optional provisions for listed gas
        appliance conversion kits
Annex E (normative) - Efficiency test procedures
Annex F (informative) - Pertinent references to ANSI Y14.15
Annex G (informative) - Wire color designations
Annex H (informative) - Recommended wire color usage
Annex I (informative) - Preferred graphic symbols of
        commonly used items, extracted from standard
        ANSI/IEEE 315, graphic symbols for electrical
        and electronics diagrams, and abbreviations
        for these items
Annex J (informative) - Sample failure modes and effects
        analysis for component miswiring
Annex K (informative) - Table of conversion factors
Annex L (informative) - Legibility and design of safety
        information in water heater markings and manuals

This Standard applies to newly produced, large automatic storage water heaters having input ratings above 75,000 Btu/hr (21 980 W), instantaneous water heaters, circulating water heaters including booster water heaters (see Clause 3, Definitions), hereinafter referred to as water heaters or appliances, constructed entirely of new, unused parts and materials: for use with natural gas; for use with manufactured gas; for use with mixed gas; for use with liquefied petroleum gases; for use with LP gas-air mixtures; for recreational vehicle installation for use with liquefied petroleum gases only (see Clause 4.1.27); for manufactured home (mobile home) installation convertible for use with natural gas and liquefied petroleum gases when provision is made for the simple conversion from one gas to the other (see Clause 4.1.26); for recreational vehicle installation convertible for use with natural gas and liquefied petroleum gases when provision is made for the simple conversion from one gas to the other (see Clause 4.1.27); and for use with combination potable water/space heating applications (see Clauses 3, Definitions, and 4.1.30).