Wet Vacuuming; Automatic Filter Cleaning (See Figure H); Maintenance And Service; Maintenance And Cleaning - Bosch GAS 35 H AFC Professional Manual Original

false air intake (36) of the dust extraction adapter (23) must
be opened. This will ensure that the automatic filter cleaning
function works correctly.
To do this, turn the ring above the false air intake (36) until
the opening is at its maximum size.
– To activate the automatic start/stop
function of the dust extractor, set the
mode selector switch (7) to the "auto-
matic start/stop" symbol.
In this operating mode, the volume flow is
electronically monitored according to the
setting of the volume flow controller (6).
Having the correct setting selected en-
sures sufficient dust transport.
– To start the dust extractor, switch on the power tool
connected to the plug socket (5). The dust extractor will
start automatically.
– To stop dust extraction, switch the power tool off.
The automatic start/stop run-on function will run for up
to 15 seconds longer in order to extract the remaining
dust from the vacuum hose.
– To switch off the dust extractor, set the
mode selector switch (7) to the "switch
off" symbol.
If the acoustic warning signal sounds, the dust extractor
must be checked as described in the "Rectifying faults" sec-
tion.

Wet vacuuming

Do not use the vacuum cleaner to vacuum combustible
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or explosive liquids, such as petrol, oil, alcohol or
solvents. Do not vacuum hot, burning or explosive
dust. Do not operate the vacuum cleaner in areas sub-
ject to explosion hazards. Dust, vapours and liquids can
ignite or explode.
The vacuum cleaner must not be used as a water
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pump. The vacuum cleaner is designed for vacuuming air
and vacuuming water mixtures.
Note: The requirements for the degree of penetration (dust
class H) have only been verified for dry extraction.
Steps to Take before Wet Vacuuming
– Remove the disposal bag (27) or the safety filter bag (26)
if necessary.
Note: Use a wet filter bag (accessory), which separates li-
quid from solids, to make disposal easier when vacuuming
water-solid mixtures.
– Place the rubber lip (30) into the floor nozzle (32).
– Switch off the automatic filter cleaning (AFC).
Vacuuming up liquids
– To switch on the dust extractor, set the mode selector
switch (7) to the "extraction" symbol.
The dust extractor is equipped with fill level sensors (40).
The dust extractor shuts down if the maximum fill level has
been reached. Set the mode selector switch (7) to the
"switch off" symbol.
Bosch Power Tools
Note: When extracting non-conductive liquids (e.g. drilling
emulsion, oils and fats), the dust extractor will not switch off
when the container is full. The fill level must be constantly
monitored and the container emptied in good time.
If the acoustic warning signal sounds during wet extraction,
the operating reliability of the dust extractor is not affected.
No measures to rectify the fault are necessary.
– To switch off the dust extractor, set the mode selector
switch (7) to the "switch off" symbol.
– To transport the dust extractor, screw the sealing plug (2)
onto the hose adapter (3).
– Empty the container (1).
To prevent mould growth after wet extraction:
– Remove the flat-pleated filter (28) and leave this to dry
thoroughly.
– Remove the top part of the dust extractor (12), open the
filter cover (39) and leave both elements to dry thor-
oughly.

Automatic filter cleaning (see figure H)

When automatic filter cleaning (AFC) is active, the flat-
pleated filter (28) is cleaned every 15 seconds using blasts
of air (pulsating noise).
The filter cleaning function should be activated at the very
latest when the suction power is no longer sufficient.
Regular use of the filter cleaning function will increase the
service life of the filter.
In order to achieve an optimum filter service life, deactivate
the automatic filter cleaning function only in exceptional
cases, e.g. when vacuuming pure liquids or using a safety fil-
ter bag.
A flat-pleated filter with surface dirt is still fully functional. It
is not necessary to clean the flat-pleated filter manually by
shaking or blowing it out; this may even damage the filter. Note: The automatic filter cleaning function is switched on
by default when the dust extractor leaves the factory.
It is only possible to switch the automatic filter function on or
off when the tool is switched on.
– Deactivating AFC
Press the AFC button (9).
The control LED (37) will go out.
– Activating AFC
Press the AFC button (9).
The control LED (37) will light up green.

Maintenance and Service

Maintenance and Cleaning

Pull the plug out of the socket before cleaning or per-
u
forming maintenance on the vacuum cleaner, making
tool adjustments, changing accessories or putting
away the vacuum cleaner. This safety measure prevents
the vacuum cleaner from being started accidentally.
To ensure safe and efficient operation, always keep
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the dust extractor and the ventilation slots clean.
English | 23
1 609 92A 5V0 | (30.11.2020)