Beckett CG10 Manuel D’Utilisation

CG10 Burner Manual

Verify that all boiler sections, canopy, and access plates 
or doors are fully equipped with gaskets and sealed 
against any leakage, which could affect the combustion 
test results.  Before making these tests, operate the 
burner for several minutes to allow the heating system 
temperature to stabilize or nearly reach steady-state 
levels.  Record all results in the start-up log for future 
reference.

Draft – Set the breech or furnace pressure to the 
level specifi ed by the appliance manufacturer.  
Typical example: +0.10” W. C.
Oxygen – It is recommended that you measure the 
oxygen (O

2

) early in the test sequence because 

high levels of carbon monoxide can be created at 
very low or even very high O

2

 levels.  The typical 

operating range is between 2.5% – 4.5 %.  The 
equivalent carbon dioxide (CO

2

) operating range is 

9% – 10.5%.

High excess air levels reduce 
the fl ames UV output and the 

scanner signal that proves the burner is fi ring.

Carbon monoxide (CO) – An operating range of 0 
-50 PPM is recommended for the CG10 burner. The 
maximum carbon monoxide (CO) level permitted 
in the fl ue gas by the UL 795 Standard is 400 PPM 
(.04%).  
Stack Temperature – The stack temperature should 
be within the range specifi ed by the appliance 
manufacturer.  It is infl uenced by input fi ring rate, 
fl ame shape, excess air ratio, and cleanliness of 
boiler fl ue passages.  This temperature, combined 
with the ambient temperature, and O

2

% (or CO

2

) is 

used in calculating the appliance effi ciency. 

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○

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Adjust the draft or breech pressure to the appliance 
manufacturer’s recommended level.
Measure the carbon monoxide level and adjust 
air settings, if necessary, to regulate it to about 50 
PPM for a starting point.  
Measure the O

2

 or CO

2

 at the 50 PPM CO level.  

For this discussion, assume the O

2

 is 1.5% (11% 

CO

2

).

Open the air adjustment until the O

2

 level is 

increased by at least 1% or to 3% O

2

  (whichever 

is higher).  This should reduce the CO level and 
provide a margin of reserve air to accommodate 
variable conditions.
Sample the CO level again.  It should be in the 0 to 
20 PPM range.
Check the draft to ensure it still meets 
specifi cations.  If a major change in draft is 
required, repeat the above steps.
Perform any fi nal adjustments and lock the air 
settings securely. Run the burner through several 
cycles to verify prompt ignition and stable burner 
operation.

1.

2.

3.

4.

5.

6.

7.

Always use calibrated test 
instruments to set combustion 

levels. Verify that test instruments are calibrated and 
in good working condition.  If not already provided, drill 
test access holes in the fl ue pipe near the breech (or 
upstream of the boiler breech damper, if applicable) and 
in the front mounting plate area for fi rebox pressure.  Be 
careful not to damage any water-backed surface.