Wet Cleaning (Chemical Cleaning) - Buderus Logano G234X Installation And Service Instructions Manual

▶ Check the gasket for damage. Replace damaged gasket. Keep the
gasket in a safe place.
▶ Label wires of flame roll out switch [4] and disconnect from the switch
[5].
▶ Disconnect connection lines to the gas fitting [7].
Fig. 33 Removing the burner
[1] Retaining screw on the gas pipe
[2] Gas pipe
[3] Igniter sensor cable
[4] Connection cable to the flame roll out switch
[5] Flame roll out switch
[6] Pilot gas pipe
[7] Connection cable to the gas valve
[8] Gas valve
▶ Loosen fixing nuts [1] on the burner shield. Pull the burner out
straight.
▶ Make sure that the spacers [2] remain on the studs.
Fig. 34 Removing the burner
[1] Fixing nuts
[2] Studs with spacers
Cleaning the boiler:
▶ Remove the boiler cover and heat insulation, check for damage.
▶ Unscrew cleaning cover from the draft diverter.
▶ Cover control unit with foil to prevent entry of metal dust into the
control unit.
▶ Use boiler brush to clean out flue gas passages.
▶ Clean combustion chamber and bottom panel.
Logano G234X – 6 720 804 886 (2012/08)
▶ Screw cleaning cover into place and replace insulation.
▶ Install boiler cover.
6 720 804 886-08.1T
Fig. 35 Cleaning the hot flue passages
[1] Cleaning brushes
[2] Thermal insulation

8.5.2 Wet cleaning (chemical cleaning)

For wet cleaning use a cleaning agent appropriate for the degree of
soiling (soot or scale).
Follow the same procedure as for cleaning with brushes ( page 24).
▶ Remove the boiler cover and heat insulation, check for damage.
▶ Unscrew cleaning cover from the draft diverter.
▶ Cover the control panel with foil to prevent spray getting into the
control panel.
▶ Ventilate boiler room well.
▶ Spray cleaning agent evenly into the heat exchanger heater passages.
▶ Carry out the burner assembly and installation in reverse order to their
removal and disassembly ( page 24).
Fig. 36 Wet-cleaning the boiler
▶ Start up the heating system.
Boiler inspection and maintenance
Observe the operating instructions of the cleaning agent.
Under some circumstances you may have to proceed
differently from the method described here.
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