Bosch GAS 50 Professional Operations Instructions download pdf (Page 17)

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Bosch Power Tools 1 609 929 K11 | (18.2.09)

When the warning light 4 flashes during IS oper-

ation and/or the alarm sounds during ENT oper-

ation, the folded filters 18 must be cleaned. For

this, set the mode selector switch 6 to the elec-

tromagnetic filter cleaning symbol. The folded

filters are cleaned for approx. 10 seconds.

If the warning light 4 should continue to flash

and/or the alarm should continue to sound, the

dust bag 17 must be exchanged.

When the warning light 4 still continues to flash

and/or the alarm continues to sound, the vacu-

um cleaner must be checked as described under

“Malfunctions”.

f The vacuum cleaner contains materials that

are hazardous to one’s health. Have the

emptying and maintenance, incl. the dispos-

al of dust-collection containers, carried out

only by specialists. Appropriate protective

equipment is required. Do not operate the

vacuum cleaner without the complete filter

system. Otherwise there is danger to your

own health.

Mounting the Vacuum Hose

(see figure A)

Mount the vacuum hose 10 onto the hose con-

nection piece 9 and turn it in clockwise direc-

tion to the stop.

Insert the extension tubes firmly into each oth-

er.

Note: Bosch recommends using static-discharg-

ing hoses with a hose Ø of 19 or 35 mm.

Operation

Starting Operation

f Observe correct mains voltage! The voltage

of the power source must agree with the

voltage specified on the nameplate of the

vacuum cleaner. Equipment marked with

230 V can also be operated with 220 V.

f Switch the vacuum cleaner off immediately

as soon as foam or water comes out, and

empty the container. Otherwise, the vacuum

cleaner can become damaged.

f Please inform yourself about the valid regu-

lations/laws for your country concerning

the handling of materials that are hazard-

ous to one’s health.

Symbols on the Mode Selector Switch

Vacuuming Deposited Dusts

(IS Operating Mode)

f Wear a dust respirator.

Note: In IS operating mode, it is only allowed to

use the 35 mm hose and nozzle program.

To start the operation of the vac, set the mode

selector switch 6 to on.

To switch off the vac, set the mode selector

switch 6 to off.

The vacuum cleaner is equipped with an airflow

monitoring system (Airflow). In the IS operating

mode, the airflow is continuously set to a value

of 20 m/s, independent of the positoin of the

Airflow regulator 5.

If this value is fallen below, e. g. caused through

debris accumulated in the vacuum hose, a full

dust bag or a clogged folded filter, warning light

4 flashes. In this case, shut the vacuum cleaner

off and check it as described under “Malfunc-

tions”.

Extracting Dusts Resulting from Running Pow-

er Tools (ENT Operating Mode with Remote

Automatic Switching) (see figure B)

f Wear a dust respirator.

f An adequate ventilation rate (L) must be

provided for when the outgoing air is circu-

lated. Observe the respective national regu-

lations. Measured with a Ø 35 mm and 5 m

long vacuum hose, the airflow is 39 l/s and

the maximum vacuum is 225 mbar.

on Switching On (IS operating mode)

off Switching Off

Electromagnetic filter cleaning

Operation with remote automatic

switching (ENT operating mode)

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