Hilti DD 150?U Operating Instructions Manual page 21

1. Bring the side handle into the desired position and
secure it (see Section 6.1.1).
2. Fit the hole-starting aid (optional operation).
3. Plug the vacuum cleaner's supply cord into the
power outlet and switch the vacuum cleaner on.
4. Plug the drilling machine's supply cord into the
en
power outlet and press the "Reset" or "I" button on
the GFCI (see Section 7.2).
5. Press the on / off switch on the machine.
6. When beginning drilling, apply only light pressure
until the core bit has centered itself and then in-
crease the pressure. Drill to a depth of 3-5 mm to
form a guide kerf (optional operation).
7. Switch the machine off by releasing the on / off
switch and then wait until the core bit has stopped
rotating (optional operation).
8. Remove the hole-starting aid from the core bit (op-
tional operation).
9. Position the core bit in the guide kerf and then
press the on / off switch to continue drilling (optional
operation).
10. Allow the vacuum cleaner to run for a few seconds
after switching off the machine in order to ensure
that the remaining dust is removed.
7.3.2 Working without dust removal
NOTE
Use slotted core bits when drilling without a dust removal
system.
NOTE
The optional operations are to be carried out when the
two-part hole starting aid is used.
CAUTION
Disconnect the machine from the power outlet before
removing the core from the slotted core bit.
DANGER
Wear respiratory protection.
NOTE
Dust is released in all directions. Drilling without a dust
removal system, especially overhead drilling, is very un-
pleasant and optimum performance is not achieved.
Overhead drilling without use of dust removal system
is therefore not recommended. For dry coring it is recom-
mended that the dust removal attachment and a suitable
vacuum cleaner are always used.
1. Secure the side handle in the desired position.
2. Fit the hole-starting aid (optional operation).
3. Insert the supply cord plug in the power outlet and
then press the "Reset" or "I" button on the GFCI (if
present).
4. Position the machine at the point where the hole is
to be drilled (hole center).
14
5. Press the on / off switch on the machine.
6. When beginning drilling, apply only light pressure
until the core bit has centered itself and then in-
crease the pressure. Drill to a depth of 3-5 mm to
form a guide kerf (optional operation).
7. Switch the machine off by releasing the on / off
switch and then wait until the core bit has stopped
rotating (optional operation).
8. Remove the hole-starting aid from the core bit (op-
tional operation).
9. Position the core bit in the guide kerf and then
press the on / off switch to continue drilling (optional
operation).
7.4 Hand-guided wet drilling without use of a water
collection system
WARNING
Water must not be allowed to run over the motor and
cover.
WARNING
A water collection system with wet-type vacuum
cleaner must be used when drilling in an upwards
direction.
NOTE
The optional operations are to be carried out when the
two-part hole starting aid is used.
1. Bring the side handle into the desired position and
secure it (see Section 6.1.1).
2. Fit the hole-starting aid (optional operation).
3. Insert the supply cord plug in the power outlet and
then press the "Reset" or "I" button on the GFCI.
4. Position the machine at the point where the hole is
to be drilled (hole center).
5. Slowly open the water flow regulator until the desired
volume of water is flowing.
6. Press the on/off switch on the machine.