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    • ANSI Z83.25-2017 (R2021)/CSA 3.19-2017 (R2021)

    Codes & Standards - Subscribe

    ANSI Z83.25-2017 (R2021)/CSA 3.19-2017 (R2021)

    Direct gas-fired process air heaters
    SKU: 2702798 Published by CSA Group Publication Year 2017 Reaffirmed in 2021

    Product Details

    • Preface/Scope
    • Items Included

    Preface


    This is the third edition of ANSI Z83.25 / CSA 3.19, Standard for Direct gas-fired process air heaters. It supersedes the previous edition published in 2015. 


    Scope


    1.1

    This Standard applies to newly produced, direct gas-fired process air heaters of the recirculating or non- recirculating type (see Clause 3, Definitions), hereinafter referred to as heaters, whose primary purpose is to provide process heating to non-occupied spaces within commercial and industrial buildings and may also include operation as a non-recirculating ventilation air heater (see Clause 3), if the heater is operated during periods when the space is occupied. 


    Heaters covered under this Standard are limited to a maximum discharge temperature of 250 °F (121 °C). 


    Heaters covered by this Standard are not intended for use in any area containing sleeping quarters. The installation conforms with local codes, or in the absence of local codes, in accordance with the National Fuel Gas Code, ANSI Z223.1, or the Natural Gas and Propane Installation Codes, CAN/CSA B149.1. 


    This Standard is intended to cover only complete packaged heaters with integral air moving components, i.e., those which are designed by, cataloged by, and built on a repetitive basis by the manufacturer. 


    1.2

    When the heater operates with people present within the space being served by this heater, it is configured so that the performance window of the heater operation will be in compliance with the applicable provisions associated with the ventilation air heater mode contained in this Standard. 


    1.3

    When the heater is operated in the bake cycle mode, the combustion by-products generated by the heater have not been defined since it is intended to operate in this mode in the non-occupied condition only. 


    1.4

    When the heater is utilized as a paint booth heater, it must be operated as a non-recirculating ventilation air heater during the spraying operation and may be operated as a recirculating heater in the bake or drying mode provided all of the conditions identified in Clauses 4.1.11, 4.1.12, 4.15.3, 4.15.12, 4.15.13, 4.15.14, 4.21.12, 4.21.13, 4.21.14, 4.21.15, 4.21.16, 4.21.17, 4.21.18, 4.21.19, and 4.21.20, if applicable, are met. 


    1.5

    Process air heaters that operate in the bake cycle mode only (does not operate in the occupied mode) are not required to comply with the following construction provisions: Clauses 4.15.5-b) and 4.21.1-m)-iii). 


    1.6

    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. 


    1.7

    Items unique to the U.S.A. are shown in Clause 6. 


    1.8

    Items unique to Canada are shown in Clause 7. 


    1.9

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


    1.10

    All references to psi through this Standard are to be considered gage pressure unless otherwise specified. 


    1.11

    In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; may is used to express an option or that which is permissible within the limits of the standard. 


    Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. 


    Notes to tables and figures are considered part of the table or figure and may be written as requirements. 


    Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

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    ANSI Z83.25-2017 (R2021)/CSA 3.19-2017 (R2021)

    Direct gas-fired process air heaters

    Active
    English

    ANSI Z83.25-2015/CSA 3.19-2015

    Direct gas-fired process air heaters

    Withdrawn
    English

    ANSI Z83.25a-2013/CSA 3.19a-2013 (R2013)

    Addenda 1 to ANSI Z83.25-2008/CSA 3.19-2008, Direct Gas-Fired Process Air Heaters

    Withdrawn
    English

    ANSI Z83.25-2008/CSA 3.19-2008 (R2013)

    Direct Gas-Fired Process Air Heaters

    Withdrawn
    English
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