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9
Maintenance
To ensure that gas consumption and the environmental load
(pollution, etc.) remain as negligible as possible over a longer
period of time, we recommend that you assure to have the
appliance maintained on an annual basis (inspection) or if
necessary (maintenance).
Your appliance must only be serviced by a
qualified technician.
DANGER: Electrical discharge!
▶ Always disconnect the electrical
current (fuse, safety power switch)
before working on the electrical
installation.
▶ Your appliance must only be serviced by a Bosch Technical
Assistance delegate.
▶ Use only genuine accessories.
▶ Order accessories according to the list of accessories
provided with the appliance.
▶ Substitute dismantled joints and o-rings with new ones.
▶ Only the following lubricants must be used:
– On hydraulic parts: Unisilikon L 641 (8 709 918 413)
– Threaded joints: HFt 1 v 5 (8 709 918 010).
9.1
Periodic maintenance tasks
Functional checks
▶ Ensure that all safety, regulatory and checking elements
are in good working order.
Heat exchanger
▶ Inspect the heat exchanger.
▶ If it is dirty:
– Dismantle the chamber and remove the regulator.
– Clean the chamber with a pressurized water jet.
▶ If the dirt resists: soak soiled parts in hot water with
detergent and clean carefully.
▶ If necessary: de-scale the interior of the heat exchanger
and connection tubes.
▶ Reassemble the heat exchanger using new joints.
▶ Remount the regulator on its support.
Therm 6000S
Burner
WARNING: Burner damage!
The burner surface is very fragile.
▶ Do not touch the burner surface, take
extra caution during the maintenance
operations!
▶ Inspect the burner annually and clean as necessary.
▶ Check the burner trought the observation window if there
are liquids or fissures.
▶ Verify if the flame is stable and blue without signs of yellow
flames.
Yellow burner flames are an indication of
improper combustion. Assure that the
installation of the exhaustion conduct and of
admission of air fulfil the manufacturer's
requirements.
▶ Verify CO
levels (see chapter 8.3) and correct it if
2
necessary.
Water filter
▶ Close the water inlet supply valve.
▶ Clean the water filter, see Fig. 48.
Fig. 48
[1] Water filter
9.2
Verify the fuses in the control board
To check fuses, proceed as follows;
▶ Remove the front cover, see Fig. 23.
Maintenance | 33
6 720 800 095 (2015/11)
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