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17、s of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.Standards Update ServiceP.6-09January 2009Title: Test method for measuring thermal efficiency of g
18、as-fired pool heatersPagination: 31 pages (viii preliminary and 23 text), each dated January 2009To register for e-mail notification about any updates to this publicationgo to shop.csa.caclick on CSA Update ServiceThe List ID that you will need to register for updates to this publication is 2020511.
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20、anization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044Visit our Online Store at www.ShopCSA.caP.6-09Test method for measuring thermal efficiency of gas-fired pool heatersCSA Standard100%ISBN 978-1-55491-084-7Technical Editor: Laura Contasti Canadian St
21、andards Association 2009All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.To purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCSA.ca or call toll-free 1-800-463-6727 or 416-747-40
22、44.The Canadian Standards Association (CSA) prints its publications on Rolland Enviro100, which contains 100% recycled post-consumer fibre, is EcoLogo and Processed Chlorine Free certified, and was manufactured using biogas energy.January 2009 iiiContents Canadian Standards AssociationTest method fo
23、r measuring thermalefficiency of gas-fired pool heatersTechnical Committee on Gas Appliances and Related Accessories vSubcommittee on Energy Efficiency of Gas-Fired Pool Heaters viiPreface viii1Scope 12 Reference publications 23 Definitions and nomenclature 23.1 Definitions 23.2 Nomenclature 44Gener
24、al 54.1 Mandatory requirement 54.2 Measuring instruments 54.2.1 Accuracy and precision 54.2.2 Temperature difference 54.2.3 Thermopile construction 55 Testing conditions 55.1 Installation of test unit 55.1.1 Other-than-convection-type pool heaters (OTDV and direct vent systems) 55.1.2 Convection-typ
25、e pool heaters (OTDV and direct vent systems) 55.2 Flue and stack requirements 55.2.1 General 55.2.2 OTCT pool heaters 65.2.3 Convection-type pool heaters 65.2.4 Pool heater with vent damper 65.2.5 Pool heater with flue damper 65.3 Input rating 65.3.1 Natural gas 65.3.2 Propane gas 75.3.3 Electrical
26、 supply 75.4 Gas burner adjustments 75.5 Circulating water adjustments 75.5.1 OTCT pool heaters 75.5.2 Convection-type pool heaters 75.6 Location of temperature measuring instrumentation Convection-type pool heaters 85.7 Combustion measurement instrumentation Convection pool heaters 85.8 Energy flow
27、 instrumentation 85.9 Room ambient temperature 86 Electric power equipment and/or energy consumption equipment 87 Test measurement 87.1 Electrical power consumption measurements 87.2 Thermal efficiency 97.2.1 OTCT pool heater 97.2.2 Convection-type pool heater 9P.6-09 Canadian Standards Associationi
28、v January 20097.3 Condensate heat loss 108Calculations 108.1 Thermal efficiency for OTCT pool heaters 108.2 Convection-type pool heaters 118.2.1 Steady-state operating efficiency 118.2.2 Latent heat loss 118.2.3 Ratio of combustion air mass flow rate to stoichiometric air mass flow rate 118.2.4 Rati
29、o of combustion and relief air mass flow rate to stoichiometric air mass flow rate 118.2.5 Sensible heat loss at steady-state operation 128.2.6 Steady-state efficiency 128.2.7 Steady-state efficiency 13AnnexesA (informative) Minimum thermal efficiency for gas-fired swimming pool heaters 17B (informa
30、tive) Location of temperature-measuring instrumentation Convection pool heaters 18Tables1 Instrument accuracy and precision requirements 142 Fuel characteristics and parameters for calculating steady-state sensible heat loss (Ls,ss) and steady-state efficiency (Effyss) 15Figures1 Arrangement for tes
31、ting OTCT pool heaters 16 Canadian Standards AssociationTest method for measuring thermalefficiency of gas-fired pool heatersJanuary 2009 vTechnical Committee on Gas Appliances and Related AccessoriesZ.J. Fraczkowski Technical Standards (b) provide an explanation of circumstances surrounding the act
32、ual field condition; and(c) be phrased where possible to permit a specific “yes” or “no” answer.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSAs periodical Info Update, which is available on the CSA Web s
33、ite at www.csa.ca. Canadian Standards AssociationTest method for measuring thermalefficiency of gas-fired pool heatersJanuary 2009 1P.6-09Test method for measuring thermal efficiency of gas-fired pool heaters1Scope1.1This Standard specifies the test method for measuring the thermal efficiency of gas
34、-fired swimming pool heaters.1.2This Standard applies to newly produced pool heaters (constructed entirely of new parts and materials) for heating, with either natural gas or liquefied petroleum, non-potable water stored at atmospheric pressure.1.3This Standard applies to the following pool heaters:
35、(a) close proximity;(b) coil type;(c) condensing;(d) direct;(e) indirect;(f) other-than-convection type; and(g) tank type.1.4This Standard does not apply to the construction and performance of gas-fired pool heaters.Note: The construction and performance of gas-fired pool heaters are addressed in AN
36、SI Z21.56/CSA 4.7.1.5In CSA Standards, “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 t
37、hat which is permissible within the limits of the Standard; and “can” is used to express possibility or capability. 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
38、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.1.6The values given in SI (metric) units are the standard. The values given in
39、parentheses are for information only.P.6-09 Canadian Standards Association2 January 20092 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.ANSI/CSA (American
40、 National Standards Institute/Canadian Standards Association)ANSI Z21.56-2006/CSA 4.7-2006Gas-fired pool heatersANSI/ASHRAE (American National Standards Institute/American Society of Heating, Refrigerating, and Air-Conditioning Engineers)103-2007Method of Testing for Annual Fuel Utilization Efficien
41、cy of Residential Central Furnaces and BoilersIEC (International Electrotechnical Commission)62301-2005Household electrical appliances Measurement of standby powerUS GovernmentUS Code of Regulations, Title 10, Part 430, as amended from time to time (referenced as 10 CFR)3 Definitions and nomenclatur
42、e3.1 DefinitionsThe following definitions apply in this Standard:Annual energy consumption the product of heater nameplate input and burner annual operating hours.Direct vent system a system consisting of(a) a pool heater for indoor installation;(b) combustion air connections between the pool heater
43、 and the outdoor atmosphere;(c) a vent cap supplied by the manufacturer for outdoor installation, constructed in such a manner that air for combustion is obtained from the outdoor atmosphere and flue gases are discharged to the outdoor atmosphere; and(d) flue gas connections between the pool heater
44、and the vent cap.Draft hood a non-adjustable device built into a heater or made part of the vent connector of a heater and designed to(a) provide for the ready escape of the flue gases in the event of no draft, backdraft, or blockage beyond the draft hood;(b) prevent a backdraft from entering a heat
45、er; and(c) neutralize the effect of stack action of the chimney or gas vent upon the operation of a heater.Flue damper a device, in the flue outlet or in the inlet or upstream of the draft hood of an automatically operated gas-fired heater, that is designed to automatically open the flue outlet duri
46、ng heater operation and to automatically close the flue outlet when the heater is in standby or shutdown condition. Flue damper devices can be(a) electrically operated, employing electrical energy to control the device; or(b) mechanically actuated, dependent for operation upon the direct application
47、 or transmission of mechanical energy without employing any type of energy conversion.Flue gases products of combustion plus excess air in heater flues or heat exchangers. Canadian Standards AssociationTest method for measuring thermalefficiency of gas-fired pool heatersJanuary 2009 3Flue losses the
48、 latent heat and sensible heat above room temperature of the flue gases leaving the heater.Flue outlet the opening provided in a heater for the escape of flue gases.Graduating thermostat a thermostat in which the motion of the valve is approximately in direct proportion to the motion of the thermal
49、element induced by temperature change.Heating capacity the rate of useful heat output when operating under steady-state conditions.Input rating the gas-burning capacity of a heater in kW (Btu/h) as specified by the manufacturer.Note: The capacity is based on sea-level operation.Other-than-direct vent (OTDV) a venting system that(a) is not direct vent; and (b) employs draft hoods or integral draft diverters.Pool heater a heater designed for heating non-potable water stored at atmospheric pressure.Note: Potable water is the type of
