Proper combustion setup,for a IBC SL45-260 high efficiency boiler

IBC boiler combustion analysis setup

     IBC boilers are among the best high efficiency condensing boilers currently on the market. Made in Canada, they are designed for our Canadian temperature extremes.

     One must keep in mind that these boilers are only as good as the boiler service technician installing them. A well experienced boiler installer will utilize industry best practice in installation methods, proper setup and service intervals to maintain efficiency.

     One final commissioning step, often overlooked in the installation and setup process, is a combustion analysis to ensure combustion parameters are within factory specifications. On this particular boiler a slight increase of CO2 was needed which was achieved by turning the gas:air ration adjustment screw roughly 1/2 - 3/4 turns counterclockwise. Each boiler may require more or less CO2 depending on local conditions such as altitude. A quality combustion analyzer, calibrated yearly, is needed to set up combustion on boilers or furnaces.

For example, on an IBC SL 45-260 boiler, the (Natural Gas) CO2% acceptable ranges.  These results must be confirmed within the Installation and Operation manual for each IBC boiler model. 

CO2% HIGH FIRE range 9.1%- 9.7%         Target 9.5%

CO2% LOW FIRE  range 8.4% – 9.0%         Target 8.7%

with less than 120 PPM CO (Carbon Monoxide) 

Manifold gas pressure, inlet gas

manifold test port and

high fire gas:air ratio,

CO2 adjustment screw location

Combustion test port location

Final efficiency readout following setup

 From initial planning, hydronic system design, boiler installation to boiler setup, boiler system maintenance and repair, we can complete all stages of a hydronic system installation.

Alberta General Plumbing

403-390-1115

Or email for more information: info@generalplumbing.ca

Or our website: Calgary Boiler Service