Maintenance Required for Burner Frequency Check
If the burner is operating improperly, remove and clean or replace. Use a
CO
2
analyzer to determine proper combustion. See Combustion test
target ranges - CO2 / Maximum CO on page 75 for correct values.
Annually
□
Warning
When removing the burner for inspection or boiler servicing, examine the sealing gaskets
and replace if damaged. Upon re-assembly, test all sealing areas to ensure there is no
leakage of combustible gas/air premix.
7.1.4 Heat exchanger
Maintenance Required for Heat Exchanger Frequency Check
In areas of poor gas quality, there may be a build-up of black plaque
(typically sulfur). Other fouling agents include: airborne dust, debris and
volatiles.
With the burner removed, examine the heat exchanger for signs of
contamination and clean if necessary. Refer to instructions in Replacing
the burner in the EX 400 and 500 models on page 90 or Replacing the
burner in the EX 700 and EX 850 models on page 100 for access to the
combustion chamber and heat exchanger.
Annually
□
7.1.5 Pump
Maintenance Required for Pump Frequency Check
Check that the pump is on in normal operation and that the water Δ°T is
reasonable for a given firing rate.
Annually
□
7.1.6 Gas piping
Maintenance Required for Gas Piping Frequency Check
Check for damage or leaks and repair as needed.
Annually
□
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