Bosch GDB 2500 WE - Инструкция по эксплуатации - Страница 17

 English | 

17

Bosch Power Tools

1 609 929 W83 | (9.11.10)

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 
machine. Power tools marked with 230 V 
can also be operated with 220 V.

f

Before beginning work, consult the struc-
tural engineer, architect or construction 
supervisor in charge. Only cut through rein-
forcements with the permission of a struc-
tural engineer.

f

When core drilling through walls or floors, 
ensure to check the respective rooms/en-
closures for obstructions. Barrier off the 
construction site and secure the drilled out 
core against falling down with the use of 
casing or similar.

Operational Check of the Residual Current 
Device

Check the proper function of the residual cur-
rent device 

2

 each time before working:

– Push the “RESET” button on the residual cur-

rent device. The service readiness of the re-
sidual current device is signalled through a 
red control indicator.

– Push the “TEST” button. The indicator above 

the “RESET” button becomes black.

Switching On

Push the “RESET” button on the residual cur-
rent device 

2

.

Open the water cock 

11

. Check the flow of wa-

ter at the water-flow indicator 

10

.

For 

starting the drilling procedure at half 

speed

, turn the On/Off switch 

13

 to the 

1/2

 po-

sition. The switch cannot be locked in this posi-
tion.
For 

drilling

, turn the On/Off switch 

13

 to the 

I

position.

Switching Off

Release the On/Off switch 

13

 or turn it to the 

0

position.
Shut the water cock 

11

. After finishing work, 

disconnect the water outlet connector 

3

 from 

the water supply. Open the water cock 

11

 and 

drain the remaining water.

Adjusting the Speed

Two speed ranges can be preselected with the 
gear selector 

4

.

The two gears are recommended for the follow-
ing bore diameters:

Working Advice

f

Before any work on the machine itself, pull 
the mains plug.

For drilling, release the lock of the feed handle 

5

 (see operating instructions of the drill stand).

Start the drilling procedure at half speed 
(On/Off switch in the 

1/2

 position) until the 

core bit rotates vibration-free in the material. 
Then continue drilling at full speed (On/Off 
switch in the 

I

 position).

While drilling, adapt the feed pressure to the 
material being drilled. Drill with uniform pres-
sure. Lightly pull the core bit out of the bore 
from time to time so that the drilling sludge is 
removed from the core bit segments.
Do not overload the machine. The control indi-
cator 

12

 flashes in case of overload (see “Con-

trol Indicator”).

Safety Clutch

If the core bit becomes caught or jammed, the 
drive to the drill spindle is interrupted. In this 
case, switch the machine off and free the core 
bit.

1st gear

82 – 212 mm

2nd gear

32 – 132 mm

OBJ_BUCH-114-002.book  Page 17  Tuesday, November 9, 2010  11:58 AM