Logano G334X, Installation And Service Instructions Manual

Page: 31 / 40

9
Boiler inspection and maintenance
Logano G334X – 6 720 811 237 (2014/05) 31
9.5.2 Wet cleaning the boiler (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
(

Chapter 9.5.1, page 29).
▶ Remove the boiler casing and thermal insulation, check for damage.
▶ Unscrew cleaning cover from the draft diverter.
To prevent entry of metal dust into the control unit:
▶ Cover controller with foil.
▶ Ventilate boiler room well.
▶ Spray cleaning agent evenly into the hot gas flues.
▶ Carry out the burner assembly and installation in reverse order to
their removal and disassembly (

page 29).
Fig. 43 Wet cleaning the boiler
▶ Check the gasket for damage.
▶ Replace damaged gasket.
▶ Place the heating system in operation.
▶ Heat the boiler to a temperature of at least 122 °F (55 °C).
▶ Shut down the heating system.
▶ Allow boiler to cool.
▶ Remove the burner (

page 29).
▶ Brush out the hot gas flues.
▶ Clean combustion chamber and bottom panel.
▶ Ventilate boiler room well again.
▶ Install or clean the burner (

page 31).
▶ Screw cleaning cover into place and replace thermal insulation.
▶ Install boiler casing.
9.6 Cleaning of burner
▶ Remove the burner (

page 29).
▶ Check burner rods for dirt.
If necessary:
▶ Clean burner as described below.
▶ Unscrew pilot burner unit [1] from burner.
▶ Disconnect pilot gas line [3] from pilot burner unit.
▶ Remove and blow out pilot orifice [2].
▶ Immerse burner rods in water with cleaning agent and brush off.
Fig. 44 Pilot burner
[1] Pilot assembly
[2] Pilot orifice
[3] Pilot gas line
[4] Igniter sensor cable
▶ Rinse off the burner rods under a stream of water. Hold burner so that
water enters all slots of the burner rods and drains out again.
▶ Remove remaining water by swinging the burner.
▶ Check that the burner rods are free.
▶ Remove water and dirt residue in the slots.
If slots are damaged:
▶ Replace the burner.
Observe the operating instructions of the cleaning agent.
Under some circumstances you may have to proceed
differently from the method described here.
6 720 645 166-24.1T
Make sure that the thermal insulation on the burner
shield does not get wet.