Remove The Rear Wall; Settings, Burner - Kärcher HDS 5/11 U Service Manual

6.3 Remove the rear wall

 Remove the tank lid.

Remove the rear wall (2 screws).

Replace the tank lid.
1 Screws
2 Reservoir cover

6.4 Settings, burner

Note
An accurate basic adjustment of the burner is only
possible if the heating coil was previously thoroughly
desooted and the deposits were removed.Eine ex-
akte Grundeinstellung des Brenners ist nur möglich,
wenn die Heizschlange vorher gründlich entrußt und
die inneren Ablagerungen entfernt wurden.
Measure water temperature
 Install the shut-off valve with thermometer (special
tool) on the appliance outlet.

Switch on the burner and bring the appliance to
working pressure with full water volume via the
shut-off valve.

Measure the increase in water temperature (water
outlet temperature minus water supply flow tem-
perature).

For target values refer to technical specifications.

Measure the air pressure on the burner cover
(special tool) and adjust it on the air slider.
 For target values refer to technical specifications.
 Measure the soot value, CO2 content and the ex-
haust temperature (special tools, measuring
gauges).
Adjusting the fuel pressure
 Set the fuel pressure (and water temperature) via
the set screw.
 For target values refer to technical specifications.
Adjusting the soot value
 If the soot value is too high, then the air slider
needs to be opened further or the fuel pressure
needs to be reduced.
Adjusting the CO2 value
 Adjust the CO2 value by moving the air slider.
Open the air slider, the CO2 content will decrease.
1 Stop screw, air volume adjustment
2 Slider, air volume adjustment
3 Fuel pump
4 Hexagon head screwdriver
English 5.906-487.0 Rev. 00 (04/10)
43