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BS 7967-4:2007

$102.76

Carbon monoxide in dwellings and the combustion performance of gas-fired appliances – Guide for using electronic portable combustion gas analysers as part of the process of servicing and maintenance of gas-fired appliances

Published By Publication Date Number of Pages
BSI 2007 22
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PDF Catalog

PDF Pages PDF Title
3 Contents
Foreword ii
1 Scope 1
2 Normative references 2
3 Terms and definitions 2
4 Electronic portable combustion gas analyser 3
5 Procedure for servicing and maintenance using an electronic portable combustion gas analyser 4
6 Completion report 10
Annexes
Annex A (informative) Background to the use of an electronic portable combustion gas analyser in regular servicing 12
Bibliography 13
List of figures
Figure 1 – Procedure for use of an electronic portable combustion gas analyser to determine whether or not the combustion performance is satisfactory, and the subsequent actions to be performed 7
Figure 2 – Procedure for the use of an electronic portable combustion gas analyser as an aid to checking combustion performance subsequent to servicing carried out in accordance with manufacturer’s instructions 9
4 Foreword
5 a) Gas Safety (Installation and Use) Regulations 1998 [1]
b) Gas Safety (Installation and Use) Regulations (Northern Ireland) 2004 [2]
c) Gas Safety (Application) Order (Isle of Man) 1996 [3]
d) Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 1995 [4]
e) Gas Safety (Management) Regulations 1996 [5]
f) Gas Safety (Management) Regulations (Northern Ireland) 1997 [6]
7 1 Scope
a) in determining the level of servicing required for a gas-fired appliance;
b) in confirming satisfactory combustion following servicing in accordance with manufacturer’s instructions;
c) in confirming satisfactory combustion following maintenance.
1) flueless gas-fired appliances (type A gas-fired appliances), e.g. cooking appliances, space heaters.
2) open flued appliances (type B gas-fired appliances).
3) room sealed appliances (type C gas-fired appliances).
a) The Institute for Environment and Health’s IEH assessment on indoor air quality in the home: Nitrogen dioxide, formaldehyde, volatile organic compounds, house dust mites, fungi and bacteria [7].
b) The Health and Safety Executive’s (HSE’s) Chemical Hazard Alert Notices, CHAN 28 on nitrogen monoxide [8] and CHAN 29 on nitr…
8 2 Normative references
3 Terms and definitions
3.1 GC number
3.2 electronic portable combustion gas analyser
3.3 dwelling
3.4 full strip and clean
9 3.5 gas operative
3.6 maintenance
3.7 servicing
3.8 shaling
3.9 safety check
3.10 work
4 Electronic portable combustion gas analyser
10 5 Procedure for servicing and maintenance using an electronic portable combustion gas analyser
5.1 General
a) to determine the level of servicing required, i.e. whether the combustion is satisfactory such as to permit servicing in accordance with the manufacturer’s instructions to be deferred for a further 12 months (see 5.2 and Figure 1),
b) to confirm satisfactory combustion following servicing in accordance with manufacturer’s instructions (see 5.3 and Figure 2).
c) to confirm satisfactory combustion following maintenance (see 5.4 and Figure 3).
11 5.2 Determination of the level of servicing required and subsequent actions (Figure 1)
a) the appliance is provided with a flue gas sampling point, or it is otherwise practical to gain access to the flow of combustion products in the flue in accordance with the guidance given in BS 7967-2:2005, Clause 6; and
b) the appliance is CE marked or displays a GC number; and
c) the appliance is:
2) an open flued or room sealed warm air heater;
3) an open flued or room sealed water heater, including circulators, but excluding back-circulators; or
4) a room sealed convector heater or room sealed fire, but excluding live-fuel effect room sealed gas fires.
a) flueing;
b) ventilation;
c) heat input and/or operating pressure, or, where necessary, both;
d) signs of spillage and/or leakage of combustion products;
e) water leaks;
f) heat stress;
g) mechanical deterioration (e.g. corrosion);
h) the integrity of the appliance case seals and joints;
i) consulting the manufacturer’s instructions for any special requirements, e.g. checking the operation of safety devices and controls and of condensate removal systems.
13 Figure 1 Procedure for use of an electronic portable combustion gas analyser to determine whether or not the combustion performance is satisfactory, and the subsequent actions to be performed
14 5.3 Confirmation of satisfactory combustion following servicing in accordance with manufacturer’s instructions (Figure 2)
15 Figure 2 Procedure for the use of an electronic portable combustion gas analyser as an aid to checking combustion performance subsequent to servicing carried out in accordance with manufacturer’s instructions
16 5.4 Confirmation of satisfactory combustion following maintenance (Figure 3)
a) For appliances with a cast iron heat exchanger corrosion can, under certain circumstances, take place causing shaling to occu…
b) Experience has shown that for appliances with close-finned, copper-fabricated heat exchangers, the burner flame picture may a…
c) With some types of heat exchanger construction, washing may be the only available method for cleaning. Where washing is appropriate this will normally be referred to in the manufacturer’s instructions.
d) Never assume that a final test ratio failure is due to incorrect sampling technique or equipment failure. If necessary the appliance manufacturer needs to be consulted for further guidance.
6 Completion report
17 Figure 3 Procedure for the use of an electronic portable combustion gas analyser to confirm satisfactory combustion following maintenance
18 Annex A (informative) Background to the use of an electronic portable combustion gas analyser in regular servicing
19 Bibliography
[1] GREAT BRITAIN. Statutory Instrument 1998, No. 2451, Gas Safety (Installation and Use) Regulations 1998. London: HMSO, www.opsi.gov.uk. Hard copies can be purchased from TSO at www.tso.co.uk
[2] NORTHERN IRELAND. Statutory Rule 2004, No. 63, Gas Safety (Installation and Use) Regulations (Northern Ireland) 2004. London: HMSO, www.opsi.gov.uk. Hard copies can be purchased from TSO at www.tso.co.uk
[3] ISLE OF MAN. Statutory Document 1996, No, 326/96, Gas Safety (Application) Order (Isle of Man) 1996. Hard copies are available from the Health and Safety at Work Inspectorate of the Isle of Man
[4] GREAT BRITAIN. Statutory Instrument 1995, No. 3163, Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 1995. London: HMSO, www.opsi.gov.uk. Hard copies can be purchased from TSO at www.tso.co.uk
[5] GREAT BRITAIN. Statutory Instrument 1996, No. 551, Gas Safety (Management) Regulations 1996. London: HMSO, www.opsi.gov.uk. Hard copies can be purchased from TSO at www.tso.co.uk
[6] NORTHERN IRELAND. Statutory Rule 1997, No. 195, Gas Safety (Management) Regulations (Northern Ireland) 1997. London: HMSO, www.opsi.gov.uk. Hard copies can be purchased from TSO at www.tso.co.uk
[7] INSTITUTE FOR ENVIRONMENT AND HEALTH (IEH). IEH assessment on indoor air quality in the home: nitrogen dioxide, formaldehyde…
[8] HEALTH AND SAFETY EXECUTIVE (HSE). Chemical Hazard Alert Notice 28 (CHAN 28), Nitrogen monoxide, 2003, www.hse.gov.uk/pubns
[9] HEALTH AND SAFETY EXECUTIVE (HSE). Chemical Hazard Alert Notice 29 (CHAN 29), Nitrogen dioxide, 2003, www.hse.gov.uk/pubns
20 [10] HEALTH AND SAFETY COMMISSION (HSC). L56, Safety in the installation and use of gas systems and appliances. The Gas Safety (Installation and Use) Regulations 1998: Approved Code of Practice and Guidance, Sudbury: HSE Books, 1998, www.hsebooks.co.uk
[11] CORGI. The Gas Industry Unsafe Situations Procedure – Dealing with unsafe situations in customers’ premises. This publication can be purchased from CORGIdirect by telephoning 0870 516 8111 or online by visiting www.corgi-direct.com
BS 7967-4:2007
$102.76