Buderus Logano GB125 BE Installation And Maintenance Instructions Manual page 39

B Clean the combustion chamber with a flat brush.
Remove the debris from the combustion chamber, the
hot gas flues and the flue connection.
B Reinstall the heat exchanger baffles in their original
positions.
B Check sealant rope on burner door. Replace damaged
or hardened sealant rope.
You can obtain suitable sealant rope from
your local Buderus wholesaler.
B Close the burner door and secure with the two hex
bolts (tighten to approx. 90 lb ins). Tighten the hex
bolts evenly.
B Seal the pressure testing nozzle for the combustion
chamber pressure.
Re-commissioning after cleaning with brushes
When the boiler is re-commissioned after cleaning with
brushes, proceed as follows:
B Plug burner cable connector into burner.
B With balanced flue operation, attach combustion air
hose to the burner.
B Prepare the heating system for operation.
8.3.2 Wet cleaning (chemical cleaning)
When wet cleaning, use a Buderus-approved cleaning
agent appropriate for the degree of soiling (soot or scale).
Follow the same sequence as described in Chapter 8.2,
page 37 and Chapter 8.3, page 38.
Follow the instructions for use of the cleaning
agent. You may need to proceed differently
from the method described here in some
circumstances.
CAUTION: Risk of system damage from
corrosion and short-circuit!
B When wet cleaning protect electrical
components including the manual reset
high limit (STB) from moisture and
chemicals.
B Cover the control panel with foil to prevent spray
getting into the control panel.
B Spray cleaning agent evenly into the heat exchanger
heater passages.
B Close burner door and start up the heating system.
B Heat the boiler to a temperature of at least 160 °F.
B Shut down the heating system.
B Brush out the heat exchanger heater.
B Start up the heating system again (see above).
Logano GB125 BE US/CA - Subject to technical modifications.
Heating system inspection
Fig. 41 Brushing out the combustion chamber
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