BS 7967-5-2010 pdf download.Carbon monoxide in dwellings and other premises and the combustion performance of gas-fired appliances Part 5: Guide for using electronic portable combustion gas analysers in non-domestic premises for the measurement of carbon monoxide and carbon dioxide levels and the determination of combustion performance.
This standard gives guidance for identifying and investigating spillage. leakage or build-up of combustion products from gas-fired appliances in non-domestic premises. It gives recommendations for determining the combustion performance of such equipment, using electronic portable combustion gas analysers. This involves sampling and measuring the carbon monoxide (CO) and carbon dioxide (C02) in the ambient air and in gas-fired appliance chimneys.
This standard is for use with equipment using 1st, 2nd or 3rd family gases.
NOTE I An operative attending non-domestic premises might be required to examine standard gas-fired appliances which are domestic or commercial as well as customized process plant) equipment.
NOTE 2 This standard does not cover the response of an emergency service provider (ESP) to a gas emergency. It also does not cover procedures for investigating incidents that are reportable under the Reporting of injuries, Diseases and Dangerous Occurrences Regulations 1995 (RI000R) (11 and the Gas Safety (Management) Regulations 1996 (GSMR) 121.
NOTE 3 Combustion products from gas-fired appliances contain aidehydes and oxides of nitrogen (NOx), predominantly nitrogen monoxide (nitric oxide, NO) and nitrogen dioxide (NO2). Although this standard does not cover the measurement of these substances, quantities of such products could be present in the air and could cause harm and irritation to humans. For guidance on the health considerations associated with these combustion products, see the Institute for Environment and Health assessment, Indoor air quality in the home: Nitrogen dioxide, formaldehyde, volatile organic compounds, house dust mites, fungi and bacteria [31.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including amendments) applies.
BS 5440-1:2008, Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net (1st, 2nd and 3rd family gases) — Part 1:
Specification for installation of gas appliances to chimneys and for maintenance of chimneys
BS 6172, Installation and maintenance of domestic gas cooking appliances (2nd and 3rd family gases) — Specification
3 Terms and definitions
For the purposes of this British Standard the following terms and definitions apply.
3.1 ambient air
atmosphere surrounding the equipment
NOTE The concentration of CO2 in ambient air within premises is typically different from the concentration of CO2 in outdoor air.
3.2 chimney
structure consisting of a wall or walls enclosing a flue or flues
NOTE This includes chimneys of all materials (e.g. metal, masonry, plastic). It may be either an open-flued chimney for use with an open-flued appliance or a room-sealed chimney configuration for use with a room-sealed appliance.
3.3 closed flue (Type B2)
flue system that is closed in a room or internal space
NOTE This is due to the absence of a draught diverter flue break or draught break within a chimney. It is now referred to as an “open flue without a draught diverter.
3.4 combustion performance
measurements of carbon monoxide, carbon dioxide and oxygen that are indicators of the quality of combustion in a gas-fired appliance
NOTE A common approach is to use the ratio (COICO2) although some equipment manufacturers might use specific flue gas concentrations of CO2 and °2 in order to optimize gas combustion.
3.5 customer-adjustable ventilation (manual/mechanical) adjustable purpose-provided unit or assembly designed to allow ventilation
3.6 electronic portable combustion gas analyser electronic equipment that can be carried around easily and that detects and measures the presence of combustion gases, clearly displaying the result.BS 7967-5 pdf free download.