Bosch BEA 055 Originalbetriebsanleitung Seite 22

en 22 | BEA 055 | Operation
5.4.4 Filters
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When replacing the filters GF1, GF2 and GF3 always
use original filters with the order no. 1 687 432 005.
If other filters are used (e.g. commercially available fuel
filters), the downstream measurement chambers will be
damaged by corrosion residue (e.g. rust particles from
metal filter elements) and inadequate filter action.
!
Warranty and goodwill claims cannot be accepted in
the event of unit failure caused by the use of incor-
rect filters.
The coarse filters remove particles and aerosols from
the measurement gas. Particles are solids such as dust
and soot. Aerosols are minute droplets of liquid. These
may be deposited in the gas path and the measurement
chambers and form coatings. Regularly replace filters to
prevent damage to the BEA 055.
Filter GF1
The coarse filter GF1 removes the coarsest particles
from the gas flow. It should therefore be replaced most
frequently. Replace the filter if severely contaminated
(fault message: poor flow) and also in the event of HC
residue. Depending on the rate of use of the BEA 055,
the filter should be replaced roughly once a week.
Filter GF2
The coarse filter GF2 removes further particles and
aerosols from the gas flow. The greater the degree of
contamination of this coarse filter, the smaller the pore
size and the better the filter action. The water in the
exhaust gas soon causes the filter to become wet. This
moisture washes the aerosols out of the gas flow and
makes for even better particulate filtration.
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A wet coarse filter is therefore desirable!
Replace the filter if severely contaminated (fault mes-
sage: poor flow) and in the event of HC residue. De-
pending on the rate of use of the BEA 055, the filter
should be replaced roughly once a month to once
a year.
Pump filter GF3
The coarse filter GF3 is designed to protect the pumps.
The coarse filter has to be replaced once a year at
most. Here, the filter action of a wet coarse filter is also
far superior to that of a dry coarse filter.
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1 689 989 181 2016-12-14
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Fig. 4: Replacing the coarse filter
Replacement of coarse filters GF2 and GF3
1. Detach the coarse filter (fig. 4, pos. 1) together with
the angular hose fittings (fig. 4, pos. 2) from the up-
per and lower connection piece.
2. Detach both angular hose fittings from the coarse
filter by twisting gently and attach them to the new
coarse filter.
3. Attach the new coarse filter with angular hose fit-
tings to the connection pieces (installation position
as indicated on BEA 055).
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Affix the sticker 1 689 980 296 to each new coarse
filter GF3. The applicable date and the signature of
the person performing the work must be marked on
the stickers. The date provides a reference for the
replacement interval and the signature confirms au-
thorized coarse filter replacement. Use a non water-
soluble felt-tip pen for labeling the sticker.
Datum/Date
Unterschrift/Sign
459558/24 Ha
Fig. 5: Sticker 1 698 980 296
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Robert Bosch GmbH