UL SUBJECT 1783-1999 Outline of Investigation for Direct Connect Systems for Solid Fuel Burning Appliances (Issue 3)《固体燃料燃烧器用直接连接系统的调查纲要版本号 3》.pdf

1、 STD-UL SUBJECT L783-ENGL 1999 9 7275795 077b07 BOT April 5, 1999 1 Subject 1783 OUTLINE OF INVESTIGATION FOR DIRECT CONNECT SYSTEMS FOR SOLID FUEL BURNING APPLIANCES Issue Number 3 April 5, 1999 COPYRIGHT O 1986.1999 UNDERWRITERS LABORATORIES INC. _ _ _ STD-UL SUBJECT 1783-ENGL 1777 7275775 077b708

2、 7ib D 2 SUBJECT 1783 APRIL 5,1999 No Text on This Page STD-UL SUBJECT 1783-ENGL 1777 D 7275775 077b707 b82 APRIL 5. 1999 SUBJECT 1783 3 CONTENTS FOREWORD 4 INTRODUCTION 1 Scope . 5 2 General 5 2.1 Terminology . 5 2.2 Units of measurement . 5 2.3 Components . 5 3 Glossary . 5 4 Installation and Main

3、tenance Instructions 6 4.1 General . 6 4.2 Installation instructions 6 4.3 Maintenance instructions 7 4.4 Coal burning accessory . 7 5 Materials . 8 6 Assembly 8 6.1 General . 8 6.2 Connection to flue collar . 9 6.3 Direct connection system flue-gas conduit . 9 6.4 Flue damper . 9 6.5 Radiation shie

4、ld and baffle . 9 PERFORMANCE 7 General 9 8 Temperature Measurement . 12 9 Thermal Shock Test and Preconditioning Exposure 13 1 O Temperature - 1000F (538C) Flue Gases 15 11 Temperature Test - 1400F (760C) Flue Gases . 15 12 Temperature Test - 21 00F (1 149C) Flue Gases 15 13 Strength Test . 16 14 S

5、weep Test 16 15 Flexibility Test for Flexible Direct Connect Systems . 17 16 Torsion Test for Flexible Direct Connect Systems . 17 17 Corrosion Resistance Test . 17 MARKING 18 General 20 STD=UL SUBJECT 1783-ENGL 1777 m 7275775 077b910 3TLI 4 SUBJECT 1783 APRIL 5, 1999 FOREWORD A. This Outline of Inv

6、estigation contains basic requirements for products covered by Underwriters Laboratories Inc. (UL) under its Follow-Up Service for this category within the limitations given below and in the Scope section of this Outline of Investigation. They are subject to revision as further experience and invest

7、igation may show is necessary or desirable. B. The observance of these requirements by a manufacturer is one of the conditions of the continued coverage of the manufacturers product. C. A product which complies with the text of this Outline of Investigation will not necessarily be judged to comply w

8、ith the Outline of Investigation if, when examined and tested, it is found to have other features which impair the level of safety contemplated by these requirements. D. A product employing materials or having forms of construction which conflict with specific requirements of the Outline of Investig

9、ation cannot be judged to comply with the Outline of Investigation. A product employing materials or having forms of construction not addressed by this Outline of Investigation may be examined and tested according to the intent of the requirements and, if found to meet the intent of this Outline of

10、Investigation, may be judged to comply with the Outline of Investigation. E. UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of UL represent its professio

11、nal judgement given with due consideration to the necessary limitations of practical operation and state of the art at the time the Outline of Investigation is processed. UL shall not be responsible to anyone for the use of or reliance upon this Outline of Investigation by anyone. UL shall not incur

12、 any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Outline of Investigation. F. Many tests required by the Outline of Investigations of UL are inherently hazardous and adequate safeguards f

13、or personnel and property shall be employed in conducting such tests. STD-UL SUBJECT 1783-ENGL 1779 7275775 077b91L 230 D APRIL 5, 1999 SUBJECT 1783 5 INTRODUCTION 1 Scope 1.1 These requirements cover direct connect systems that are intended to provide for direct connection between a solid-fuel burn

14、ing appliance and a masonry fireplace chimney. Solid-fuel burning appliances include fireplace stoves, room heaters, and fireplace inserts. Direct connect systems are intended for installation in accordance with the Standard for Chimneys, Fireplaces, Vents and Solid-Fuel Burning Appliances, NFPA 21

15、1. 2 General 2.1 Terminology 2.1.1 The term “product“ as used in these requirements refers to an entire direct connect system or any part thereof covered by these requirements unless specifically noted otherwise. 2.2 Units of measurement 2.2.1 If a value for measurement is followed by a value in oth

16、er units in parentheses, the second value may be only approximate. The first stated value is the requirement. 2.3 Components 2.3.1 Except as indicated in 2.3.2, a component of a product covered by this standard shall comply with the requirements for that component. 2.3.2 A component need not comply

17、with a specific requirement that: a) Involves a feature or characteristic not needed in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3.3 A component shall be used in accordance with its recognized rating establishe

18、d for the intended conditions of use. 2.3.4 Specific components are recognized as being incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and

19、shall be used only under those specific conditions for which they have been recognized. 3 Glossary 3.1 DIRECT CONNECTION - The type of flue connection required between a solid-fuel burning appliance and a masonry fireplace chimney, wherein a connector pipe extends from the appliance flue collar at l

20、east to the chimney flue liner. The connector pipe may or may not be attached to the chimney flue liner. 6 SUBJECT 1783 APRIL 5, 1999 4 Installation and Maintenance Instructions 4.1 General 4.1.1 The installation and maintenance instructions may be either in a single manual or be separate manuals, a

21、nd shall be packed with the product. 4.1.2 The instructions shall make reference to the manufacturers or private labelers catalog designation, or equivalent, for the product and/or its components, and shall include the manufacturers or private labelers name and address. 4.1.3 The installation and ma

22、intenance instructions required to be provided with the product shall be furnished with the sample submitted for investigation and shall be used as a guide in the investigation of the product. The instructions need not be in final printed form for the investigation. 4.2 Installation instructions 4.2

23、.1 Installation instructions shall be illustrated and include directions and information necessary to complete the intended installation of the product. 4.2.2 The installation instructions shall include: a) Details concerning the parts and materials required and the step-by-step process for installi

24、ng the product. b) Specific reference to indicate the type of appliance(s) and fuels with which the product is designed to be used. c) Instructions to the installer to examine the masonry fireplace and chimney prior to installation of the product to determine that the construction meets the minimum

25、fireplace construction requirements specified and/or illustrated in the instructions, that it is free from cracks, loose mortar, creosote deposits or other blockage, or other signs of deterioration. The instructions shall also state that if evidence of deterioration is noted, the product should not

26、be installed or used until repairs have been made to the fireplace. d) Description of any limitations with respect to installation and minimum installation clearances. e) Details concerning the method of joining two or more parts to constitute the intended assembly, and the like. f) Instructions for

27、 removal or securement of the fireplace damper, if installation of the system renders the existing fireplace damper control inaccessible. g) Illustrations that completely describe the installation of the assembly and connection through the damper area and into the flue lining. h) A statement to the

28、installer to verify that the size of the chimney is such that its cross- sectional area is not greater than three times the cross-sectional area of the direct connector system flue pipe, with examples provided as to how to make such a verification. i) A statement advising the installer to contact lo

29、cal building or fire officials concerning any installation restrictions or need for inspection of the product installation. APRIL 5. 1999 SUBJECT 1783 7 4.3 Maintenance instructions 4.3.1 Maintenance instructions shall be provided with each product. 4.3.2 The maintenance instructions shall include p

30、articular details concerning: a) Inspection, maintenance and cleaning of the direct connect system and masonry chimney, including reference to the formation and removal of creosote build-up in the chimney as follows (the inspection frequency “once every 2 months” stated below may be a shorter time p

31、eriod at the manufacturers or private labelers option). ”Creosote - Formation and Need for Removal When wood is burned slowly, it produces tar and other organic vapors which combine with expelled moisture to form creosote. The creosote vapors condense in the relatively cool chimney flue of a slow-bu

32、rning fire. As a result, creosote residue accumulates on the flue lining. When ignited this creosote makes an extremely hot fire. The chimney should be inspected at least once every 2 months during the heating season to determine if a creosote build-up has occurred. If creosote has accumulated it sh

33、ould be removed to reduce the risk of a chimney fire.” b) Details concerning the step-by-step process for removal and reinstallation of the product for periodic inspection and cleaning of it and the solid-fuel burning appliance. c) Details concerning the inspection methods for determining whether cl

34、eaning is necessary. d) A statement advising the user of any servicing that should be performed by a qualified service representative. 4.4 Coal burning accessory 4.4.1 The maintenance instructions for a product intended for use with a coal burning appliance product shall also include: a) Reference t

35、o the formation and removal of soot buildup in the direct connect system and masonry chimney as follows (the inspection frequency ”once every 2 months” stated below may be a shorter time period at the manufacturers or private labelers option): “Soot - Formation and Need for Removal When coal is burn

36、ed, the products of combustion combine with moisture to form a soot residue which accumulates on the flue lining. When ignited, this soot makes an extremely hot fire. The chimney should be inspected at least once every 2 months during the heating season to determine if a soot buildup has occurred. I

37、f soot has accumulated, it should be removed to reduce the risk of chimney fire.” b) A caution statement regarding the use of fuels other than those specified in the appliance connected to the product. STD-UL SUBJECT L73-ENGL 1979 m 7275775 077b9L4 TLIT m SUBJECT 1783 APRIL 5. 1999 8 inch 0.01 8 0.0

38、18 Aluminum-coated steel Type T1-40 regular 0.40 ounces per square foot (0.1 2 kg/m2) Galvanized steel (G60 coating class minimum) 5 Materials (mm) 0.46 0.45 5.1 A flue-gas conduit shall be: a) Stainless steel, Series 300 or 400 or equivalent (see Corrosion Resistance Test, Section 17); and b) Const

39、ructed in a manner to permit the necessary forming to fit the application without reduction in strength and without damaging itself. 5.2 The minimum thickness of metal (including any coatings) shall comply with Table 5.1. Table 5.1 Minimum metal thickness Stainless steel I Steel (uncoated or painted

40、) l 0.007 I 0.042 6 Assembly 6.1 General 6.1.1 A direct connect system shall be provided with all the parts necessary for the intended installation of a complete assembly. Each part of the assembly shall be constructed for ready attachment of one to the other without requiring alteration, cutting, t

41、hreading, drilling, welding, or similar task by the installer. Exception: An assembly or component pari intended to be cut to length or to be fitted by the installer may be provided if means are furnished for joining any altered pari to a companion pari or assembly. All fasteners required to complet

42、e the assembly shall be provided with the product by the manufacturer. Drilling is acceptable if: a) The drilling operation does not weaken the assembly; and b) The size of the required drill bit is specified and instructions clearly describe the locations to be drilled, such as by the use of templa

43、tes, drawings, descriptions, or the like. 6.1.2 A direct connect system and related parts shall be constructed and assembled to have the strength, rigidity, and durability to resist damage during tests in accordance with these requirements and during handling and installation. 6.1.3 Two or more part

44、s or subassemblies that must bear a definite relationship to each other shall be: a) Arranged and constructed to permit them to be incorporated into the complete assembly without need for alteration or alignment and only in the correct relationship with each other; or b) Assembled and shipped from t

45、he factory as one element. STD-UL SUBJECT 1783-ENGL 1979 m 7275775 077b915 78b m APRIL 5, 1999 SUBJECT 1783 9 6.2 Connection to flue collar 6.2.1 The direct connect system shall be provided with a means of attachment to the appliance flue collar by at least two screws or other equivalent mechanical

46、methods. 6.2.2 A flue collar connection shall be of a nominal whole-inch diameter of 6 inches (152 mm) or greater. Exception: A size that is for connection to a specific solid-fuel burning appliance need not be of a nominal whole-inch size diameter. 6.3 Direct connection system flue-gas conduit 6.3.

47、1 The flue gas conduit shall be of sufficient length to extend from the flue collar to the inlet of the flue tile liner section of the chimney. The flue-gas conduit shall be constructed to pass through the damper section of the masonry fireplace and provide a means to isolate the fireplace chamber f

48、rom the chimney. If the product is intended for use with fireplace stoves or room heaters, at least 48 inches (1.2 m) of conduit length shall be provided. 6.4 Flue damper 6.4.1 If incorporated within a direct connect system, a flue-gas outlet damper operated through a linkage or other mechanism shal

49、l be constructed so that breakage of a part will not cause the damper to partially or completely close. 6.5 Radiation shield and baffle 6.5.1 A radiation shield or baffle if provided shall be constructed, formed, and supported to provide the intended positioning and to prevent distortion or sagging when tested in accordance with these requirements. PERFORMANCE 7 General 7.1 After being subjected to the tests specified in Sections 9 - 12, as applicable, a direct connect system shall be acceptable for further use. 7.2 Test results indicating compliance with