CSA 3 8-2014 Gas-fired equipment for drying farm crops (Sixth Edition).pdf

1、CSA 3.8-2014Gas-fired equipmentfor dryingfarmcropsLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approvedby the Standards Council of Canada. This process brings together volunteers representing

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21、44.TMA trade-mark of the Canadian Standards Association and CSA America Inc., operating as “CSA Group”Interprovincial Gas Advisory CouncilApproved on September 9, 2014 by IGACEffective in Canada June 1, 2016Gas-firedequipmentfor drying farmcropsCSA 3.8-2014CSA 3.8-2014Gas-fired equipment for drying

22、farm cropsOctober 2014 2014 CSA Group 1ContentsCSA Technical Committee on Gas Appliances and Related Accessories 3Interprovincial Gas Advisory Council 5Technical Subcommittee on Gas Operated Agricultural Equipment 7Preface 81 Scope 92 Reference publications 103 Definitions 134 Construction 174.1 Gen

23、eral 174.2 Assembly 204.3 Accessibility 204.4 Combustion air and ventilation 214.5 Main burners 224.6 Primary air adjustment means 234.7 Combustion air adjustment means 244.8 Orifices and orifice fittings 254.9 Automatic gas ignition systems 254.10 Flame spreaders 294.11 Valve trains 294.12 Manual g

24、as valves 294.13 Gas supply lines 304.14 Additional requirements for liquid propane valve trains 354.15 Bleeds and vents 364.16 Automatic gas valves 374.17 Hydrostatic relief valve 384.18 Input flow control systems 384.19 Gas appliance pressure regulators 384.20 Adjustment of minimum input rating 40

25、4.21 Pilots and pilot lines 404.22 Operating and limit controls 434.23 Thickness of materials 444.24 Motors 464.25 Fans 474.26 Air filters 474.27 Integral vaporizers for direct-fired application 474.28 Instructions 474.29 Marking 514.30 Electrical 544.31 Programmable controllers 554.32 Protection of

26、 service personnel 55CSA 3.8-2014Gas-fired equipment for drying farm cropsOctober 2014 2014 CSA Group 25 Performance 575.1 General 575.2 Test Gases 605.3 Test pressures and burner adjustments 605.4 Basic test arrangement 615.5 High temperature limit control system 615.6 Airflow sensing systems 615.7

27、 Operating temperature control system 635.8 Burner operating characteristics 635.9 Burners and safety shutoff devices 655.10 Piloted ignition systems 675.11 Direct ignition systems 685.12 Gas appliance pressure regulators 715.13 Automatic valves 715.14 Main burner and flame spreader temperatures 715

28、.15 Nonload-bearing combustion gas baffle temperatures 735.16 Manifold and control assembly capacity 745.17 Power interruption 745.18 Wall, floor (optional), ceiling, electrical equipment, and wiring temperatures 745.19 Rain test 785.20 Wind test 795.21 Rain and wind tests for inlet air openings 805

29、.22 Burner durability 815.23 Electrical tests 815.24 Marking material adhesion and legibility 826 Manufacturing and production tests 83Annex A (normative) Items unique to Canada 85Annex B (informative) 87Annex C (informative) Guidelines for fuel air ratio control (FARC) systems 89Annex D (Informativ

30、e) Pertinent references to ANSI Y14.15 92Annex E (Informative) Wire color designations 93Annex F (Informative) Recommended wire color usage 94Annex G (informative) Preferred graphic symbols of commonly used items, extracted from standardANSI/IEEE 315, Graphic symbols for electrical and electronics d

31、iagrams, andabbreviations for these items 95Annex H (informative) Table of conversion factors 97Annex I (informative) Pipe train diagram 100CSA 3.8-2014Gas-fired equipment for drying farm cropsOctober 2014 2014 CSA Group 3CSA Technical Committeeon Gas Appliancesand Related AccessoriesZ.J. Fraczkowsk

32、i Technical Standards c) wording of the proposed change; andd) rationale for the change.5) To submit a request for interpretation of this Standard, please send the following information to6) inquiriescsagroup.organd include “Request for interpretation” in the subject line:a) define the problem, maki

33、ng reference to the specific clause, and, where appropriate, include anillustrative sketch;b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address theissue.Committee in

34、terpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.CSA 3.8-2014Gas-fired equipment for drying farm cropsOctober 2014 2014 CSA Group 9CSA 3.8-2014Gas-firedeq

35、uipmentfor drying farm crops1 Scope1.1This Standard applies to newly produced direct gas-fired crop dryers of the recirculating or nonrecirculating type hereinafter referred to as “dryers”, whose primary purpose is to provide processheating to dry farm crops. These dryers are used in non-occupiedspa

36、ces and are constructed of non-combustible materials having input ratings of 12,500,000Btu/hr (3 663 389 W) or less, constructedentirely of new unused parts and materials.This Standard refers to equipment in which heated air is used to reduce the moisture content of farmcrops.The installation is to

37、conform with local codes, or in the absence of local codes, in accordance with theNatural Gas and Propane Installation Code, CSA B149.1, and the Propane Storage and Handling Code,CSA B149.2.This Standard is intended to cover complete dryers with integral air moving components, i.e., thosewhich are d

38、esigned by, catalogued by, and built on a repetitive basis by the manufacturer and those inwhich the dryer and air moving components are tested as an assembly and available for separate sale.1.2Dryers covered under this Standard are for use:a) with natural gas; andb) with propane in the liquid and v

39、apour phase.1.3This Standard applies to dryers intended for outdoor use only.1.4This Standard is limited to dryers that are equipped with forced draft burner(s), which relies oncombustion air supplied by a mechanical device such as a fan or blower.1.5The construction of dryers for use with the above

40、 mentioned gases is covered under Clause 4.1.6The performance of dryers for use with the above mentioned gases is covered under Clause 5.1.7If a value for measurement as given in this Standard is followed by an equivalent value in other units, thefirst stated value is to be regarded as the specifica

41、tion.CSA 3.8-2014Gas-fired equipment for drying farm cropsOctober 2014 2014 CSA Group 101.8All references to pressure throughout this Standard are to be considered “gauge” pressure, unlessotherwise specified.1.9This Standard contains SI (Metric) corresponding to the yard/pound quantities,the purpose

42、 being toallow the standard to be used in SI (Metric) units. (Standard for use of the International System of Units(SI): The Modern Metric System, IEEE/ASTM SI 10 or ISO 80000-1:2009Quantities and units Part 1:General are used as a guide in making metric conversion from yard/pound quantities.) If a

43、value for ameasurement and a corresponding value in other units are stated, the first stated value is to be regardedas the requirement. The given corresponding value may be approximate. If a value for a measurementand a corresponding value in other units are both specified as a quoted marking requir

44、ement, the firststated unit, or both shall be provided.2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to theedition listed below including all amendments published therein.CSA GroupB149.1-10Natural Gas and Propane Installatio

45、n CodeB149.2-10Propane Storage and Handling CodeC22.1-12Canadian Electrical Code, Part IC22.2 No. 0.15-01 (R2012)Adhesive LabelsC22.2 No. 0.8-12Safety Functions IncorporatingElectronicTechnologyC22.2 No. 3-M1988 (R2009)Electrical Features of Fuel-Burning EquipmentC22.2 No. 24-93 (R2013)Temperature-I

46、ndicating and -Regulating EquipmentC22.2 No. 77-95 (R2013)Motors with Inherent OverheatingProtectionC22.2 No. 113-12Fans and VentilatorsCAN/CSA C22.2 No. 199-M89 (R2004)Combustion Safety Controls and Solid-State Igniters for Gas- and Oil-Burning EquipmentCSA 3.8-2014Gas-fired equipment for drying fa

47、rm cropsOctober 2014 2014 CSA Group 11CSA 3.11-M88 (R2009)Lever Operated PressureLubricated Plug Type Gas Shut-Off ValvesCSA 3.16-M88 (R2009)Lever Operated Non-Lubricated Gas Shut-Off ValvesCSA CAN1-6.4-M79(R2011)Automatic Gas Ignition Systems and ComponentsCSA CAN1-6.6-M78(R2011)Gas Appliance Therm

48、ostatsCAN/CGA-8.1-M86 (R2011)Elastomeric Composite Hose and Hose Couplings for Conducting Propane and Natural GasCAN1-8.3-77(R2011)Thermoplastic Hose and Hose Couplings for Conducting Propane and Natural GasANSI Z21.15-2009 CSA 9.1-2009Manually Operated Gas Valves for Appliances,Appliance Connector

49、Valves and Hose End ValvesANSI Z21.18-2007/CSA6.3-2007 (R2012)Gas Appliance PressureRegulatorsANSI Z21.20-2007 CSA C22.2 No. 199-2007 UL 372Automatic Electrical Controls for Household and Similar Use Part 2: Particular Requirements forAutomatic Burner Ignition Systems and ComponentsANSI Z21.21-2012 CSA 6.5-2012Automatic Valves for Gas AppliancesANSI Z21.23-2010Gas Appliance ThermostatsANSI Z21.78-2010 CSA 6.20-2010Combination Gas Controls for Gas AppliancesASME (American Society for Mechanical Engineers)ASME B1.1-2003 (R2008)Standard for Uni