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15.4.5 Cleaning the heat exchanger (per boiler
module)
Release the retaining nuts from heat exchanger cover
plate, remove plate, be careful not to damage the gas-
ket, store safely.
Heat exchanger can be washed with clean water, if
badly contaminated, clean with a small stiff bristle "bot-
tle type" brush or use the special cleaning tool (supplied
optional). Care should be taken when using water in the
confined space of the boiler casing to avoid contaminat-
ing the electrical controls. Compressed air can also be
used but care should be taken to ensure disturbed dust
etc does not contaminate the rest of boiler and controls.
Replace the heat exchanger front plate after the clean-
ing and tighten the retaining nuts.
fig. 31 heat exchanger opened up for cleaning
15.4.6 Cleaning the burner assembly (per boiler
module)
Clean the burner assembly by using compressed air
only - between 2 and 5 bar with the nozzle positioned a
min of 10 mm away and towards the face of the burner.
Check that the retaining bolts are tight.
If the burner is removed from the front plate ensure
burner-retaining screws are tight on re-assembly.
fig. 32
burner attached to plate with air nozzle
cleaning the surface
15.4.7 Cleaning the condensate collector (per boiler
module)
Clean the condensate collector by removing the inspec-
tion cover (next to the flue gas discharge) and then rins-
ing the collector with water.
fig. 33 condensate collector inspection cover
49
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