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BS 7967-4:2007 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, 2007
- Contents [Go to Page]
- 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
- Foreword [Go to Page]
- 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]
- 1 Scope [Go to Page]
- 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. [Go to Page]
- 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...
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 GC number
- 3.2 electronic portable combustion gas analyser
- 3.3 dwelling
- 3.4 full strip and clean
- 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
- 5 Procedure for servicing and maintenance using an electronic portable combustion gas analyser [Go to Page]
- 5.1 General [Go to Page]
- 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).
- 5.2 Determination of the level of servicing required and subsequent actions (Figure 1) [Go to Page]
- 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: [Go to Page]
- 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.
- 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
- 5.3 Confirmation of satisfactory combustion following servicing in accordance with manufacturer’s instructions (Figure 2) [Go to Page]
- 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
- 5.4 Confirmation of satisfactory combustion following maintenance (Figure 3) [Go to Page]
- 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 [Go to Page]
- Figure 3 Procedure for the use of an electronic portable combustion gas analyser to confirm satisfactory combustion following maintenance
- Annex A (informative) Background to the use of an electronic portable combustion gas analyser in regular servicing [Go to Page]
- Bibliography [Go to Page]
- [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
- [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 [Go to Page]
