Technical data

9.The repair DBW 2010 / 2012 / 2020 / 2022 / 300 / 350
902
9.1.1 The measures pertaining to the elements
that are dismantled to parts
ATTENTION
All gaskets between the elements that are dismantled to
parts must as a matter of principle be removed and
replaced with new ones.
9.1.1.1 General Visual Examination
ł All parts must be checked to see whether or not
there is any damage (crack, deformation, wearing,
etc.) and the parts must be replaced in case of any
damage.
ł The sockets and cables must be checked to see
whether or not there is any corrosion, contact
failure, etc. and repaired if necessary.
ł It must be checked to see if there is corrosion on
the socket contacts and whether or not the sockets
have been installed correctly and must be repaired
if necessary.
9.1.1.2 The visual examination of the combustion
chamber
- Check if the screw cap sits tight
- Check to see if there is any scaling in the
combustion chamber and clean the soot layer if
there is any scaling.
- Check to see if there is crack on the welding seam.
WARNING
Cracks up to a length of 80 mm in the longitudinal
direction on the welding seam can be permitted.
9.1.1.3 The visual examination of the heat
exchanger
- Check to see if there is any soot, sediment, damage
or corrosion in the exhaust path of the heat
exchanger.
WARNING
The sediments must be cleaned with water and brush.
- Check to see if there is any external damage,
deformation, etc. in the heat exchanger.
WARNING
Excessive deformation can obstruct the flow of the
cooling liquid.
9.1.1.4 The visual examination of the burner fan
- Check to see whether or not there is pollution and
cracks on the burner fan.
- Check to see if the cap sits tight.
- Check to see if the slide bolt sits correctly.
Only at DBW 2010/2012:
- Adjust the clearance between the fan wheel and fan
body to be 0.15 ± 0.05 mm at the narrowest place
(can be measures with a scintil). Refer to the Spare
Part Catalogue and Accessory Catalogue for the
tool.
9.1.2 Making the changes
WARNING
The constant improvement of the heating devices is based
on the endeavor of raising the level of development with
the aim preventing the defects and failure to work. Under
normal conditions, change of equipment can be made
regarding the devices that are currently functioning.
Improvement kits are available for this.
The changes that could be carried out in the framework of
the repair tasks are indicated below:
• The installation of the pre-heating element of the nozzle
block in the heating devices DBW 2010 / 2012 / 2020 /
300 / 350equipped with the control device 1553
(REFER TO 9.1.2.1)
• The installation of the pre-heating element of the nozzle
block in the heating devices DBW 2012 / 2010 / 2020 /
300 / 350 equipped with the control device 1563/64
(refer t0 9.1.2.2).
Clearance measurement
0.15 ± 0.05 mm
Special wrench
Only DBW 2020/2022/300/350:
Check to see if there are cracks at the rotor core and the
cover disc (back wall) is sound.