Component Maintenance Required Frequency Check
Condensate
trap
Remove and clean annually (see Cleaning the condensate
trap on page 98). Ensure that the trap has been re-filled
completely before firing the boiler.
Annually
□
If condensate neutralization is used, check the pH level of
condensate discharge.
Annually
□
Burner
Warning
When removing the burner for inspection or
combi 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.
Remove the burner to inspect for extent of fouling (see
Replacing the burner on page 94.
a.
Wash the burner from outside with domestic water
pressure, and dry using compressed air.
b. Evaluate the magnitude of clearing required, and
establish a reasonable burner inspection schedule.
Some combi boiler / locations may call for annual
service, others showing clean burners will only need
attention every 2 – 5 years.
c. Reassemble. Visually inspect the burner through
sight glass. Ensure the flame is stable, without
excessive fluttering. Normal flame pattern is evenly
distributed over the burner surface.
As needed
□
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 82 for correct values.
Annually
□
Heat
exchanger
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 as necessary.
Annually
□
Boiler Pump
Check that the pump is on in normal operation and that the
water Δ°T is reasonable for a given firing rate.
Annually
□
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