8
Boiler inspection and maintenance
Logano G234X – 6 720 804 886 (2012/08) 25
▶ 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.
▶ Screw cleaning cover into place and replace insulation.
▶ Install boiler cover.
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.
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