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BS 7967:2015 Guide for the use of electronic portable combustion gas analysers for the measurement of carbon monoxide in dwellings and the combustion performance of domestic gas-fired appliances >
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BS 7967:2015 Guide for the use of electronic portable combustion gas analysers for the measurement of carbon monoxide in dwellings and the combustion performance of domestic gas-fired appliances, 2015
- ListBullet
- FixBullets
- Foreword
- 1 Scope
- 3 Terms and definitions
- 4 Competence
- 5 Gas analyser
- 5.1 Selection
- 5.2 Preparation of gas analyser
- 5.2.1 Pre-checks before use
- 5.2.2 Preparation of gas analyser for use
- 6 Investigation of reports of fumes, smells and spillage/leakage of combustion products in dwellings
- 6.1 Determining scope of investigation
- 6.2 Safety principles
- 6.2.1 Basic rules
- 6.2.2 CO investigation action levels
- 6.3 Preliminary procedure for carrying out checks for CO spillage/leakage from gas appliances
- 6.3.1 Possible circumstance identified by preliminary discussion with customer (see Figure 1)
- 6.3.2 Sweep test for open-flue and room-sealed appliances
- 6.3.3 Detailed discussion with customer (see Figure 1)
- 6.4 Confirming safe operation of a gas appliance
- 6.4.1 Investigation of “suspect” gas appliances
- 6.4.2 Detailed examination
- 6.4.3 Additional checks when combustion performance is satisfactory
- 6.4.4 Final checks
- 6.5 Specific gas appliance considerations
- 6.5.1 General
- 6.5.2 Air extraction/circulation systems
- 6.5.3 Flueless (type A)
- 6.5.4 Open-flue (type B)
- 6.5.5 Room-sealed (type C)
- 6.5.6 Warm air heaters
- 6.5.7 Fires
- 6.5.8 Fire/back boilers and fire/back circulators
- 6.5.9 Cookers
- 6.5.10 Appliances in compartments
- 6.6 Check of non-gas appliances and/or for continued smell/presence of CO
- 7 Reacting to activation of CO detectors
- 7.1 General
- 7.2 Electrical CO detector
- 7.3 CO indicator card
- 8 Determining ambient levels of carbon monoxide (CO) in a room
- 8.1 General advice on measurement procedures
- 8.2 Preparation for CO build-up testing
- 8.3 Testing procedures
- 8.3.1 General
- 8.3.2 Room-sealed (type C) appliances
- 8.3.3 Open-flue (type B) appliances
- 8.3.4 Flueless (type A) appliances
- 8.3.5 Additional considerations
- 8.3.6 Identifying external sources of CO
- 9 Information on levels of CO
- 9.1 General
- 9.2 Additional information on levels of CO for gas cookers
- 9.3 Responding to CO levels
- 9.4 CO from appliances other than gas appliances
- 9.5 CO from sources other than appliances
- 9.6 References to information on the effects of CO
- 9.7 Movement of CO
- 9.8 Generation of CO, smells and fumes when no fault with gas installation
- 10 Determination of the combustion performance of an appliance
- 10.1 Types of gas-fired appliance
- 10.2 General procedures
- 10.3 Sample probes
- 10.4 Sampling procedure
- 10.4.1 Flueless (type A) appliances
- 10.4.2 Open-flue (type B) appliances
- 10.4.3 Room-sealed (type C) appliances
- 11 Procedure for commissioning, servicing and maintenance using a gas analyser
- 11.1 General
- 11.2 Confirmation of safe and/or efficient operation at the time of commissioning
- 11.3 Determination of the level of servicing required and subsequent actions (see Figure 5)
- 11.4 Confirmation of satisfactory combustion following servicing in accordance with the gas appliance instructions (Figure 6)
- 11.5 Confirmation of satisfactory combustion following maintenance (Figure 7)
- 12 Combustion action levels
- 12.1 General
- 12.2 CO/CO2 ratios above the action level
- 12.3 Failure to achieve a satisfactory combustion performance
- 13 Completion and leaving the property
- 14 Reports
- Annex A Gas analyser
- Annex B Movement of CO in buildings
- Annex C Multi-hole sample probes
- Annex D Flue/draught diverter configurations for warm air heaters
- Annex E Background to the use of a gas analyser in regular servicing
- Annex F Dwelling investigation report
- Annex G Gas appliance investigation report
- Bibliography
- Figure 1 Flow chart of the preliminary procedure for carrying out checks for CO spillage/leakage from gas appliances [Go to Page]
- Table 1 Approval bodies and statutory regulations by country/territory
- Table 2 Competence requirements by country/territory
- Table 3 Combustion performance (CO/CO2 ratio) action levels [Go to Page]
