Boiler
Component
Maintenance Required Frequency Check
b. Evaluate the magnitude of clearing required, and
establish a reasonable burner inspection
schedule. Some 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.
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 73 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 if 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
□
Gas Piping
Check for damage or leaks and repair as needed.
Annually
□
Boiler
treatment
Check consistency of any boiler treatment used, for
appropriate mixture. Chemical inhibitors are consumed
over time, lowering their density.
Annually
□
Verify proper operation after servicing.
Caution
Installers should inquire of local water
purveyors as to the suitability of their supply
for use in hydronic heating systems.
If water quality is questionable, a local water
treatment expert must be consulted for
testing, assessment and, if required,
treatment.
Alternatively, water or hydronic fluid of known
quality can be brought to the site.
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