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1、BRITISH STANDARD BS 799-2:1991 Oil burning equipment Part 2: Specification for vaporizing burners Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:48:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 799-2:1991 This British Standard, having been prepared under
2、the direction of the Refrigeration, Heating and Air Conditioning Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 31 January 1992 BSI 03-1999 First published October 1964 Second edition April 1981 Third edition 31 January 1992 The followin
3、g BSI references relate to the work on this standard: Committee reference RHE/13 Draft for comment 91/72757 DC ISBN 0 580 19982 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Refrigeration, Heating and Air Conditioning Standards Polic
4、y Committee (RHE/-) to Technical Committee RHE/13, upon which the following bodies were represented: Agricultural Engineers Association Associated Offices Technical Committee British Combustion Equipment Manufacturers Association Building Services Research and Information Association Chartered Insti
5、tution of Building Services Engineers Department of the Environment (Building Research Establishment) Department of the Environment (Property Services Agency) Electricity Supply Industry in England and Wales Engineering Equipment and Materials Users Association Institute of Domestic Heating and Envi
6、ronmental Engineers Institute of Energy Institution of Fire Engineers Loss Prevention Council Power Generation Contractors Association (BEAMA Ltd.) Coopted Members Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri
7、Dec 08 11:48:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 799-2:1991 BSI 03-1999i Contents Page Committees responsibleInside front cover Forewordii Section 1. General 1.1Scope1 1.2Definitions1 Section 2. Fully automatic pot-type vaporizing burners 2.1Fuels for pot burners2 2.2Burner system2 2.3O
8、il feed and oil shut-off2 2.4Ignition2 2.5Air supply2 2.6Burner construction2 2.7Control2 2.8Flame failure3 2.9Combustion performance and smoke index3 2.10 Electrical supply3 Section 3. Fully automatic rotary-type vaporizing burners 3.1Fuels for burners4 3.2Burner system4 3.3Oil feed and oil shut-of
9、f4 3.4Ignition4 3.5Air supply4 3.6Burner construction4 3.7Control4 3.8Flame failure5 3.9Combustion performance and smoke index5 3.10 Electrical supply5 Section 4. Semi-automatic vaporizing burners 4.1Fuels for burners6 4.2Burner system6 4.3Oil feed and oil shut-off6 4.4Ignition6 4.5Air supply6 4.6Bu
10、rner construction6 4.7Control6 4.8Flame failure7 4.9Combustion performance and smoke index7 4.10 Electrical supply7 Section 5. Materials and components 5.1Materials8 5.2Oil filters9 5.3Electrical equipment10 5.4Operating instructions10 5.5Marking10 Publication(s) referred toInside back cover License
11、d Copy: London South Bank University, London South Bank University, Fri Dec 08 11:48:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 799-2:1991 ii BSI 03-1999 Foreword This Part of BS 799 has been prepared under the direction of the Refrigeration, Heating and Air Conditioning Standards Policy Commi
12、ttee. It replaces BS 799-2:1981 which is withdrawn. This edition of BS 799-2 contains no technical changes from the 1981 edition. It does not reflect a full review, which will be undertaken in due course. The only changes implemented by this edition are: a) the references have been brought up-to-dat
13、e; b) the clause numbering system has been changed; c) minor editorial changes have been included to bring the standard up to current BSI house style. This Part of BS 799 is one of a series of standards on oil burning equipment and deals with types of vaporizing burners suitable for burning oil comp
14、lying with classes C2 and D of BS 2869. It specifies requirements for the safe and reliable operation of vaporizing burners. The object of this Part of BS 799 is to fulfil the need for a British Standard on various types of burners often associated with single family dwellings and not covered by BS
15、799-3 and BS 799-4, which deal with atomizing burners. For oil storage tanks, reference should be made to BS 799-5. Where information is required relating to the installation of the types of oil burner covered by this Part of BS 799, reference should be made to BS 5410-1. Product certification. User
16、s of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS 5750.
17、 Enquiries as to the availability of third party certification schemes will be forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A Brit
18、ish Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
19、t cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Ban
20、k University, London South Bank University, Fri Dec 08 11:48:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 799-2:1991 BSI 03-19991 Section 1. General 1.1 Scope This Part of BS 799 specifies requirements for oil vaporizing burners and associated equipment for boilers, heaters, furnaces, ovens and
21、other similar static flued plant such as free standing space heating appliances for single family dwellings. It is not intended to be applicable to atomizing burners1) or gas generators used for industrial purposes or to marine and mobile installations. The standard does not apply to the appliances
22、to which the burner is fitted. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 1.2 Definitions for the purposes of this Part of this British Standard the following definitions apply. 1.2.1 oil petroleum oil fuel of classes C2 and D as specified in
23、 BS 2869 1.2.2 vaporizing oil burner burner incorporating a vaporizing or gasifying device and including means of regulating the oil and combustion air. The burner may also include filter, pumps and fans. Ignition equipment control devices, safety devices and oil preheaters may be incorporated with
24、the burner as a unit, according to the type of oil burning equipment 1.2.3 pot burner burner consisting of a metal pot in which the oil is vaporized and in which combustion commences. A vaporizing surface, usually the base of the pot, is provided and oil is fed to it by gravity from a constant-level
25、 device via a metering device. Combustion air usually enters through perforations in the walls of the pot in such a way that it mixes progressively with the oil vapour. Separate air feed pipes or additional air inlets forming an integral part of the burner, such as an annulus at the mouth of the pot
26、, may also be used. Although combustion commences in the pot, the flame normally burns mainly outside the mouth of the pot 1.2.4 rotary burner burner consisting of a centrally mounted motor that provides means of supplying air and oil to the combustion zone formed local to the appliances heating sur
27、face. A vaporizing surface is provided upon which the oil strikes when thrown from the central oil distributor. Combustion air usually enters through the base of the motor housing and is drawn up through the motor by means of a fan on top of the distributor. It is then fed across the hearth plate wh
28、ere it mixes with the vaporized fuel. Normally this mixture then burns on a grill assembly situated above the vaporizing surface. Oil is fed to the burner by means of a constant-level device or oil-control device. From the control it is fed to the distributor, which, by its rotating action, throws t
29、he oil in a horizontal plane onto the vaporizing surface 1.2.5 perforated sleeve burner burner consisting of one or more narrow vaporizing troughs into which the oil is fed by gravity from a constant-level device via a metering device. The sides of each trough are surmounted by perforated metal wall
30、s through which the combustion air enters and mixes with the oil vapour. Combustion takes place partially above, but mainly between, the pairs of perforated sleeves. A wick may be fitted in the trough for kindling purposes 1.2.6 fully automatic burner burner that automatically performs a sequence of
31、 operations including starting and stopping. The oil consumption may be either preset or be automatically variable between predetermined limits fixed by the manufacturer 1.2.7 semi-automatic burner burner that is started either manually or by manually controlled electric ignition, and is finally shu
32、t down by hand. Whilst the burner is alight the oil consumption is automatically varied from high to low or vice versa or to any other flow rate as may be determined by the heat requirements, e.g. boiler water temperature 1) See BS 799-3 and BS 799-4. Licensed Copy: London South Bank University, Lon
33、don South Bank University, Fri Dec 08 11:48:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 799-2:1991 2 BSI 03-1999 Section 2. Fully automatic pot-type vaporizing burners 2.1 Fuels for pot burners Each vaporizing burner shall be arranged and set to burn one of the following two fuels: a) kerosene,
34、 having a maximum viscosity of 2 mm2/s at 40 C, complying with class C2 as specified in BS 28692); b) heating oil, having a maximum viscosity of 5.5 mm2/s at 40 C, complying with class D as specified in BS 2869. When changing from one fuel to the other, the burner shall be modified in accordance wit
35、h the manufacturers instructions. 2.2 Burner system Fully automatic pot burners shall be constructed and controlled so as to operate in such a manner that all the requirements of this Part of BS 799 apply in order to give safe and reliable operation in all circumstances. 2.3 Oil feed and oil shut-of
36、f 2.3.1 Means shall be provided for ensuring that oil is supplied to the burner at the correct rate at all times. 2.3.2 The burner shall incorporate devices that will: a) meter the oil supply to the burner within the required limits of flow and be so set and sealed that it shall not have a flow rate
37、 in excess of 10 % above the declared maximum burning rate; b) shut off the oil supply in all cases where the burner is idle or where flame is not established (see also 2.8); c) shut off the oil supply should the devices provided to meet the requirements of 2.3.2 b) fail or be inoperative for any re
38、ason. The device shall require manual reset. 2.3.3 It shall not be possible to remove any component in the oil supply line to the burner without the use of a tool. 2.3.4 The integral fuel lines shall be of metal and shall not be loadbearing parts of the construction. Connectors shall be leak-tight.
39、Removable tubing shall be connected by means of metal screw threads including at least four engaged threads. The sealing of the parts containing fuel shall be such that there is no leakage or seepage. 2.4 Ignition Means shall be provided for automatically igniting the oil. NOTE 1Ignition may be inte
40、rmittent or continuous during operation. NOTE 2Ignition is intermittent when it is active only for a period associated with the starting cycle, or re-establishment of flame following flame failure. Ignition is continuous when it is active throughout the period during which the burner is alight. 2.5
41、Air supply 2.5.1 Means shall be provided for ensuring an adequate supply of air to ensure efficient combustion. 2.5.2 Where an ignitor is energized whilst the burner is idle and where the fuel is normally supplied to the burner by gravity, adequate air shall be available by natural draught to ensure
42、 safe combustion of any oil seepage into the burner. Where assisted, forced or induced draught is used, failure of combustion air supply shall not give rise to a dangerous condition. 2.5.3 Manually operated dampers shall not be fitted. Automatically operated dampers, if fitted, shall be interlocked
43、with the fuel supply and arranged so that the burner cannot operate with a closed flue. 2.5.4 When operating under pilot or low fire conditions, sufficient air shall be available to permit combustion and to achieve compliance with 2.9. 2.6 Burner construction The burner shall be constructed in such
44、a manner that the lowest point of oil spillage is not less than 6.5 mm higher than the maximum trip oil level in the constant-level control. 2.7 Control 2.7.1 The burner and control system in combination shall be such that, in the event of failure to ignite when starting, the burner will assume a sa
45、fe condition (lock-out) and will require manual reset of its sequencing control. In the event of a flame failure occurring when running, the provisions of 2.8 shall apply. 2.7.2 A temperature or pressure sensing device shall be provided on the appliance to start and stop the burner; it may also be u
46、sed to control the rate of firing. In addition, a separately operating limiting device shall be provided to stop the burner before the pressure or temperature in the boiler, furnace or other appliance exceeds safe limits. 2) 1 mm2/s = 1 cSt. Licensed Copy: London South Bank University, London South
47、Bank University, Fri Dec 08 11:48:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 799-2:1991 BSI 03-19993 2.7.3 Controls and safety devices shall be coupled so that operation of each occurs in the correct sequence and timing; coupling may be electrical or mechanical. The controls and safety devices
48、 shall: a) ensure that the start-up sequence is not able to commence unless the flame sensing equipment has confirmed the no-flame condition; b) establish satisfactory ignition of the oil; c) maintain normal operation if the flame is satisfactorily established, and switch off ignitor, except where c
49、ontinuous means of ignition is employed; d) automatically vary the burner firing rate, where applicable; e) stop the burner in accordance with the control sequence when the demand for heat is satisfied; f) stop the oil supply and lock-out system if flame is not satisfactorily established during the starting sequence; g) provide means for a visible or audible indication that the unit is in a lock-out condition; h) ensure that any interruption of the electricity supply does not give rise to a dangerous condition (see 2.10). 2.7.4 If the control sequences are such that an a