Roger Russell Plumbing, Performance Testing.

Specifications / performance testing

Specifications

Explanation…Printout of the Combustion Products Analyser using Tempest 50 with Nox upgrade.

Combustion gases are predominantly CO2 (Carbon Dioxide), N2 (Nitrogen, inert) and H2 (Water Vapour). Measuring Combustion Products will give information on the running efficiency and CO/CO2 ration. Traditionally the CO/CO2 ratio has been used to establish safe combustion and efficiency in the Industrial Heating Sector.

Today's domestic central heating boilers are extremely sophisticated using CPU technology, central processing unit, on PCBs, printed circuit boards. Using this technology boiler manufacturers can achieve the minimum efficiency levels required (80%) qualifying for a CE mark. By law since 1996 all gas appliances sold in the UK must carry the CE mark. This is in line with the Single European Market directive on gas appliances introduced in 1992. The British Standard 5258 permitted maximum ratio of carbon monoxide to carbon dioxide in combustion products must not exceed greater than 0.02. The Institution of Gas Engineers and British Gas require a full service if the CO/CO2 ratio is greater than 0.004.

Model of Combustion Analyser.
Date reading taken.
Time reading taken.
Air is 21% oxygen, 79% nitrogen (inert) approximately.
Fuel tested (natural gas is mostly Methane)

Room temperature.
Combustion products temperature.
Differential of STACK and AMBIENT or INTAKE.
Flue inlet temperature.
Figures below are for guidance. Individual boilers may fall short or exceed for reasons other than performance!
O2: 6 - 9% of oxygen in flue 0 = Maximum.
Efficiency CO: less than 50ppm carbon monoxide, 200ppm for 7hrs would be fatal.
CO2: 7 - 9% carbon dioxide content, harmless.
XAIR: 60% excess air, surplus to that needed for combustion.
RATIO: greater than 0.004 CO/CO2 ratios, appliance faulty, servicing required.
EFF: 70-95% where G, gross efficiency and N, Net for Condensing boilers. Prs, Flue pressure, draught measurement movement of flue products.
NO: Nitric oxide.
Nox: less than 50 nitrogen oxides. This contributes to the formation of acid rain and also reacts with Sunlight to produce Smog. Governments are producing legislation to control such emissions

Click on any of the subjects below to view the relevent information sheets.

1: Part L, New Government regulations. 2: Condensing Boilers. 3: Combination Boilers. 4: Benchmark Logbook. 5: Powerflushing, why? 6: Water Analysis. 7: Performance Testing. 8: Quality Mark system. 9: Domestic Fire Sprinklers. Back to Rogers' Home Page

Contact Roger

For more information please call
+44(0)1223 843230
or email R.J.H.C@tesco.net

Roger Russell
Specifications / performance testing	Specifications
Explanation…Printout of the Combustion Products Analyser using Tempest 50 with Nox upgrade. Combustion gases are predominantly CO2 (Carbon Dioxide), N2 (Nitrogen, inert) and H2 (Water Vapour). Measuring Combustion Products will give information on the running efficiency and CO/CO2 ration. Traditionally the CO/CO2 ratio has been used to establish safe combustion and efficiency in the Industrial Heating Sector. Today's domestic central heating boilers are extremely sophisticated using CPU technology, central processing unit, on PCBs, printed circuit boards. Using this technology boiler manufacturers can achieve the minimum efficiency levels required (80%) qualifying for a CE mark. By law since 1996 all gas appliances sold in the UK must carry the CE mark. This is in line with the Single European Market directive on gas appliances introduced in 1992. The British Standard 5258 permitted maximum ratio of carbon monoxide to carbon dioxide in combustion products must not exceed greater than 0.02. The Institution of Gas Engineers and British Gas require a full service if the CO/CO2 ratio is greater than 0.004. Model of Combustion Analyser. Date reading taken. Time reading taken. Air is 21% oxygen, 79% nitrogen (inert) approximately. Fuel tested (natural gas is mostly Methane) Room temperature. Combustion products temperature. Differential of STACK and AMBIENT or INTAKE. Flue inlet temperature. Figures below are for guidance. Individual boilers may fall short or exceed for reasons other than performance! O2: 6 - 9% of oxygen in flue 0 = Maximum. Efficiency CO: less than 50ppm carbon monoxide, 200ppm for 7hrs would be fatal. CO2: 7 - 9% carbon dioxide content, harmless. XAIR: 60% excess air, surplus to that needed for combustion. RATIO: greater than 0.004 CO/CO2 ratios, appliance faulty, servicing required. EFF: 70-95% where G, gross efficiency and N, Net for Condensing boilers. Prs, Flue pressure, draught measurement movement of flue products. NO: Nitric oxide. Nox: less than 50 nitrogen oxides. This contributes to the formation of acid rain and also reacts with Sunlight to produce Smog. Governments are producing legislation to control such emissions	Click on any of the subjects below to view the relevent information sheets. 1: Part L, New Government regulations. 2: Condensing Boilers. 3: Combination Boilers. 4: Benchmark Logbook. 5: Powerflushing, why? 6: Water Analysis. 7: Performance Testing. 8: Quality Mark system. 9: Domestic Fire Sprinklers. Back to Rogers' Home Page Contact Roger For more information please call +44(0)1223 843230 or email R.J.H.C@tesco.net
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