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3. Unscrew and remove interior cleaning cover plate.
4. The flue gas heating exchanger can now be easily accessed from the rear
and can be rinsed.
5. Mount the cover plates after cleaning.
6. Activate operating switch.
Cleaning exceptional case – for very severe soiling:
1. Deactivate operating switch.
2. Close locking valves, open drainage valve and empty boiler.
3. Unscrew and remove cover plate.
4. Remove heat insulation.
5. Unscrew and dismount couplings.
6. Unscrew flue gas heat exchanger (spiral finned tube)
(4 screws/flue gas heat exchanger)
and lift out.
7. Clean flue gas exchanger by rinsing or
scrubbing it.
8. Mount flue gas heat exchanger and couplings
9. Open locking valves and fill boiler.
10. Check whether all pipe connections are waterproof,
tighten if required.
11. Mount heat insulation and cover plate.
12. Activate operating switch.
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