Maintenance; Periodic Maintenance Tasks - Bosch Therm 8000 S GWHC 27 CTDE Installation And Operating Instructions Manual

9

Maintenance

To ensure that gas consumptio n and the environmental load
(pollution, etc.) remain as neglig ible as possible over a longer
period of time, we recommend that you assure to have the
appliance maintained on an annual
necessary (maintenance).
Your appliance must only be serviced by a
quali ed technician.
DANGER: Electrical discharge!
B Always disconnect the electrical current
(fuse, safety power switch) before
working on the electrical installation.
B Your appliance must only be serviced by a Bosch Technical
Assistance delegate.
B Use only genuine accessories.
B Order accessories according to the list of accessories
provided with the appliance.
B Substitute dismantled joints and o-rings with new ones.
B 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
B Ensure that all safe ty, regulatory and checking elements are
in good working order.
Heat exchanger
B Inspect the heat exchanger.
B If it is dirty:
– Dismantle the chamber and remove the regulator.
– Clean the chamber with a pressurized water jet.
B If the dirt resists: soak so iled parts in hot water with
detergent and clean carefully.
B If necessary: de-scale the interior of the heat exchanger and
connection tubes.
B Reassemble the heat exchanger using new joints.
B Remount the regulator on its support.
Therm 8000 S
Burner
basis (inspection) or if
B Inspect the burner annually and clean as necessary.
B Check the burner trought the observation window if there
B Verify if the ame is stable and blue without signs of yellow
B Verify CO
Water lter
B Close the water inlet supply valve.
WARNING: Burner damage!
The burner surface is very fragile.
B Do not touch the burner surface, take
extra caution during the maintenance
operations!
are liquids or ssures.
ames.
Yellow burner ames are an indication of
improper combustion. Assure that the
installation of the exhaustion conduct and
of admission of air full ll the
manufacturer's requirements.
levels (ver chapter 8.3) and correct it if
2
necessary.
Maintenance | 37
6 720 680 174 (2012/09)