Crown Boiler AWR Series Instructions For Field Conversion page 4

10) Use a combustion analyzer to check the CO level in the boiler flue gases. On AWR, AWI, BSI and CWI boilers, sample
the flue gases directly over the heat exchanger (Figure 3). On BWF and CWD series boilers, sample the flue gases by insert-
ing the probe into the vent terminal. The CO level in the flue gases should be less than 50PPM. Possible causes of elevated
CO include, but are not limited to:
• Incorrect manifold pressure
• Incorrect orifice size for the fuel type and altitude
• Crooked or out-of-round main burner orifice (never attempt to drill orifice for these boilers in the field).
• Partially plugged flue passages
• Foreign material in burner ports or venturis
• Leak in the seal between the flue collector and heat exchanger
• Inadequate combustion air supply
Do not leave the boiler in operation with a CO level in excess of 50PPM - consult the factory if the cause of the elevated
CO level cannot be identified and corrected.
11) Apply the "Boiler Conversion Label" to a conspicuous surface immediately adjacent to the boiler's rating plate. Fill in the
date of the conversion and the name and address of the company making the conversion with a permanent marker.
12) Refer to the "Start-up and Checkout" section of the boiler installation manual and perform any checks not already com-
pleted.
Failure to check the CO level in the flue gases or leaving the boiler in operation with an exces-
sive CO level in the flue gases could result in injury or death from carbon monoxide poison-
ing.
WARNING
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