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ANSI Z21.10.3-2014/CSA 4.3-2014 - Gas-fired water heaters, volume III, storage water heaters with input ratings above 75,000 Btu per hour, circulating and instantaneous (PDF Download)

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Overview

Preface

This is the sixth edition of ANSI Z21.10.3 / CSA 4.3, Gas-Water Heaters, Volume III, Storage Water Heaters With Input Ratings Above 75,000 Btu Per Hour, Circulating Or Instantaneous.

Scope

1.1
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:

a) for use with natural gas;

b) for use with manufactured gas;

c) for use with mixed gas;

d) for use with liquefied petroleum gases;

e) for use with LP gas-air mixtures;

f) for recreational vehicle installation for use with liquefied petroleum gases only (see Clause 4.1.26);

g) 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 4.1.25);

h) 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 4.1.26); and

i) for use with combination potable water/space heating applications (see Clauses 3, Definitions, and 4.1.29).

Automatic storage water heaters having input ratings of 75,000 Btu/hr (21 980 W) or less are covered in Volume I.

1.2
Instantaneous water heaters with input ratings of 200,000 Btu/h (58 614 W) or less which are designed to deliver water at a controlled temperature of less than 180 °F (82 °C) are subject to Federal minimum efficiency requirements for residential water heaters or covered in Clause 8, Items unique to Canada, are exempt from recovery, thermal efficiencies and standby loss, and related markings required by this Standard.

1.3
Direct vent water heaters anticipated by this Standard are essentially balanced flue appliances with the air intake and vent outlet in close proximity. Other designs are to be subjected to such additional tests as believed necessary at the discretion of the testing agency.

1.4
Water heaters for installation in recreational vehicles are to be of the direct vent type.

1.5
This Standard also applies to water heaters with draft hoods which are factory equipped with automatic vent damper devices (see Clause 3, Definitions), hereinafter referred to as vent damper devices.

1.6
This Standard also applies to water heaters of other than the direct vent type which are factory equipped with electrically operated or mechanically actuated automatic flue damper devices (see Clause 3, Definitions), hereinafter referred to as flue damper devices.

1.7
If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification, except as noted in Clauses 4.29.1 and 4.30.1.

1.8
All references to "psi" throughout this Standard are to be considered gauge pressures unless otherwise specified.

1.9
Clause 7 contains provisions that are unique to the United States.

1.10
Clause 8 contains provisions that are unique to Canada.

1.11
Special construction provisions applicable to a water heater designed for use with an optional listed conversion kit are outlined under Annex D, Optional provisions of listed appliance conversion kits.

1.12
Clause 2, Reference publications, contains a list of standards specifically referenced in this Standard, and sources from which these reference standards may be obtained.

 

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Details
Pages:
218

Preface

This is the sixth edition of ANSI Z21.10.3 / CSA 4.3, Gas-Water Heaters, Volume III, Storage Water Heaters With Input Ratings Above 75,000 Btu Per Hour, Circulating Or Instantaneous.

Scope

1.1
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:

a) for use with natural gas;

b) for use with manufactured gas;

c) for use with mixed gas;

d) for use with liquefied petroleum gases;

e) for use with LP gas-air mixtures;

f) for recreational vehicle installation for use with liquefied petroleum gases only (see Clause 4.1.26);

g) 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 4.1.25);

h) 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 4.1.26); and

i) for use with combination potable water/space heating applications (see Clauses 3, Definitions, and 4.1.29).

Automatic storage water heaters having input ratings of 75,000 Btu/hr (21 980 W) or less are covered in Volume I.

1.2
Instantaneous water heaters with input ratings of 200,000 Btu/h (58 614 W) or less which are designed to deliver water at a controlled temperature of less than 180 °F (82 °C) are subject to Federal minimum efficiency requirements for residential water heaters or covered in Clause 8, Items unique to Canada, are exempt from recovery, thermal efficiencies and standby loss, and related markings required by this Standard.

1.3
Direct vent water heaters anticipated by this Standard are essentially balanced flue appliances with the air intake and vent outlet in close proximity. Other designs are to be subjected to such additional tests as believed necessary at the discretion of the testing agency.

1.4
Water heaters for installation in recreational vehicles are to be of the direct vent type.

1.5
This Standard also applies to water heaters with draft hoods which are factory equipped with automatic vent damper devices (see Clause 3, Definitions), hereinafter referred to as vent damper devices.

1.6
This Standard also applies to water heaters of other than the direct vent type which are factory equipped with electrically operated or mechanically actuated automatic flue damper devices (see Clause 3, Definitions), hereinafter referred to as flue damper devices.

1.7
If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification, except as noted in Clauses 4.29.1 and 4.30.1.

1.8
All references to "psi" throughout this Standard are to be considered gauge pressures unless otherwise specified.

1.9
Clause 7 contains provisions that are unique to the United States.

1.10
Clause 8 contains provisions that are unique to Canada.

1.11
Special construction provisions applicable to a water heater designed for use with an optional listed conversion kit are outlined under Annex D, Optional provisions of listed appliance conversion kits.

1.12
Clause 2, Reference publications, contains a list of standards specifically referenced in this Standard, and sources from which these reference standards may be obtained.