Bosch GDB 180 WE Professional Original Instructions Manual page 14

OBJ_BUCH-2199-002.book Page 14 Monday, June 1, 2015 12:16 PM
14 | English
Inserting a Core Bit
 Examine the core bit before inserting it. Use only core
bits that are in perfect condition. Damaged or deformed
core bits can lead to dangerous situations.
Clean the core bit before inserting it. Apply a light coat of
grease to the core bit thread or spray on a corrosion protec-
tion agent.
Screw a 1 1/4"-UNC core bit 14 onto the drill spindle 15.
 Check the proper seating of the core bit. Incorrectly or
unsecurely fastened core bits can become loose during op-
eration and may pose a danger.
Removing a Core Bit
 Wear protective gloves when replacing the core bit.
The core bit can become hot after prolonged operation of
the power tool.
Loosen the core bit 14 using an open-end spanner (size
41 mm). When doing so, hold a second open-end spanner
(size 32 mm) on the two flats of the drill spindle 15 to provide
counterforce.
Connecting the Water Cooling/Dust Extraction
When wet- or dry-drilling core bits are not sufficiently cooled
during drilling, the diamond segments can become damaged
or the core bit can become jammed in the bore hole. There-
fore, provide for sufficient water cooling during wet drilling,
and for proper operating dust extraction during dry drilling.
When boring out a given bore, the given bore must be careful-
ly plugged in order to enable sufficient cooling of the core bit.
 Connected hoses, shut-off valves or accessories must
not obstruct or hinder the drilling process.
Connecting the Water Cooling
Place the tap connection adapter 7 on the claw coupling 11
and tighten it all the way in clockwise direction.
Shut the water cock 9. Connect water supply to the water-out-
let connector 8. The water supply is possible either via a mo-
bile water-pressure container (accessory) or via stationary
water connection.
If the power tool is inserted into a drill stand, you can collect
the water escaping from the bore hole using a water collection
ring and a wet/dry vacuum cleaner (both accessories).
 When wet drilling overhead, the escaping water must
be collected. To do this, insert the power tool into a drill
stand and mount a water collecting ring.
Read and observe the operating instructions of the water col-
lection ring to mount it.
Connecting the Dust Extraction
 Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
1 609 92A 1A3 | (1.6.15)
– As far as possible, use a dust extraction system suitable
for the material.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
Place the extraction adapter 6 on the claw coupling 11 and
tighten it all the way in clockwise direction.
Attach the vacuum hose 4 of a wet/dry vacuum cleaner
geared towards and recommended for this system (see
"Accessories/Spare Parts", page 15) to the vacuum
connection 5.
Operation
Starting Operation
 Observe the mains voltage! The voltage of the power
source must correspond with the data on the type plate of
the machine.
 Before beginning work, consult the structural engi-
neer, architect or construction supervisor in charge.
Only cut through reinforcements with the permission
of a structural engineer.
 When core drilling through walls or floors, ensure that
you check the respective rooms/enclosures for ob-
structions. Barrier off the construction site and secure
the drilled out core against falling down with the use of
casing or similar.
Function test of the portable residual current device
(PRCD)
Each time before beginning work, check that the portable re-
sidual current device (PRCD) 3 is functioning properly:
– Press the "TEST" button on the portable residual current
device (PRCD). The red control indicator extinguishes.
– Press the "RESET" button. It must now be possible to
switch the power tool on.
If the red control indicator does not extinguish when you
press the "TEST" button or if it extinguishes repeatedly when
the power tool is switched on, then you must have the power
tool checked by an authorised Bosch after-sales service
agent.
 If the portable residual current device (PRCD) is defec-
tive, the power tool must not be operated.
Switching On
Press the "RESET" button on the portable residual current
device (PRCD) 3.
Wet drilling: Set the water cock 9 to flow.
To switch on the power tool, press the On/Off switch 1 and
keep it pressed.
To lock the pressed On/Off button, additionally press the
lock-on button 2.
To save energy, only switch the power tool on when using it.
Bosch Power Tools