Boiler Maintenance
Cleaning and Maintenance
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4
No.
Component / Maintenance Operation
Interval
10
Lambda probe
Unscrew and remove the lambda probe and clean with a clean
cloth.
Refit and finger-tighten the lambda probe.
11
Conveyor grate
In the chamber opposite the heat exchanger:
Remove the cover from the cleaning hatch.
Remove the cleaning cover.
Check the grate and ash rakes for dirt and deposits. Clean where necessary.
3-M
12
Flue gas return (FGR) (optional)
Remove the pipe insulation from the inspection cover.
Unscrew the wing nuts from the inspection cover and remove the
cover.
Check the pipe for dirt and deposits. Clean where necessary.
13
Servomotors, drives, door contact switch
Visually inspect operation of the drives of the feed and ash removal
screws and the grate.
Check the efficiency of the door contact switch.
When the door is opened, the induced draught unit must operate
at full speed.
Check the efficiency of the air flap servo motors:
Press the reset button on the servo motor to release the air flap.
Hold the reset button pressed down.
Turn the air flap to the left-hand endstop.
Release the test knob.
The air flap must return automatically to its original position.
6-M
