6.6.2 Cleaning the exterior of the combustion
chamber and burner cylinder
!
WARNING
Chemical burn hazard through cleaning
agents. Safety gloves and eye protection
must be worn when using cleaning agents.
Observe the information on the original pack-
aging.
NOTICE
The system can be damaged when using in-
correct cleaning agents.
Use only cleaning agents approved for gas
boilers with aluminium components.
Spray on the cleaning agent undiluted
Open end spanner SW 17, adjustable span-
ner, screw driver, spray gun
Preparation:
1. Set the main switch on the boiler control unit to “0”.
vom Netz trennen (Hauptschalter, Sicherung).
2. Close the main gas valve
3.
Remove the sound insulation cover
4.
Disconnect all the burner connector plugs
5. Pull the corrugated hose off the venturi tube on the
burner (if present)
Opening the combustion chamber:
1. Loosen the cap nut SW17
2. Lift and turn the burner with the boiler door sideways
3.
Remove the neutralisation box and siphon or mainte-
nance of the neutralisation unit see point 6.9)
8
Fig. 35
Cleaning:
1. Spray the combustion chamber and aluFer
®
tubes
(10, Fig. 36).
The best results are obtained with a spray gun with
a suitable wide jet nozzle (fan or conical jet). We rec-
ommend, e.g.: Desoxin
2. Leave the applied cleaning agent to react as in-
structed by the manufacturer
3.
Then remove the contamination on the combustion
chamber and aluFer
®
tubes by spraying them with
clean water. Use a powerful jet
4.
Repeat the procedure in case of stubborn dirt
5. Flush clean the bottom tube plate. Use an angled
spray lance
6. Clean and dry the boiler tray
7.
Clean the siphon see point 6.8:
• screw it off
• clean it
• screw it back on
•
fill it with water
8. Clean the fabric material in the burner cylinder with
compressed air
9. Reconnect the gas and electrical connections
10. Place the boiler into operation
11.
Carry out a flue gas measuring according to point 5.8.
Correct the settings, if necessary. Complete a meas-
urement record.
10
Fig. 36
42
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MAINTENANCE
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