Hilti DD 120 Bedienungsanleitung Seite 34

NOTE
When using the vacuum base plate: Screw the anchor
base plate onto the vacuum base plate.
1. Turn (retract) the 4 leveling screws until they project
approx. 5 mm beneath the combination base plate
or, respectively, the vacuum base plate.
2. Connect the vacuum connector of the combination
en
base plate to the vacuum pump.
3. Locate the center point of the hole to be drilled.
4. Draw a line approximately 800 mm in length from
the center of the hole to be drilled towards where
the drill stand is to be positioned.
5. Make a mark on the line at a distance of 203 mm
(8") from the center of the hole to be drilled.
6. Switch on the vacuum pump and press the vacuum
release valve.
7. Bring the mark on the combination base plate or
vacuum base plate into alignment with the line.
8. Once the drill stand has been positioned correctly,
release the vacuum release valve and press the base
plate against the base material.
9. Level and steady the combination base plate or
vacuum base plate by turning the 4 leveling screws.
10. An additional means of securing the drilling system
must be provided when drilling horizontally. (e.g. a
chain attached to an anchor, etc.)
11. Make sure that the drilling system is secured reliably.
6.1.4 Adjusting the drilling angle (optional for rails
with tilt mechanism)
CAUTION
There is a risk of crushing the fingers in the pivot mech-
anism. Wear protective gloves.
1. Release the screw on the rail tilt mechanism.
2. Adjust the rail to the desired angle.
3. Retighten the screw securely.
6.1.5 Fitting the water connection
CAUTION
Regularly check the hoses for damage and make sure
that the maximum permissible water supply pressure
of 6 bar is not exceeded.
CAUTION
Make sure that the hose doesn't come into contact
with rotating parts.
CAUTION
Make sure that the hose is not pinched and damaged
as the carriage advances.
CAUTION
Do not change gear while the machine is running.
Wait for the spindle to come to a halt.
30
NOTE
To avoid damage to the components, use only fresh
water containing no dirt particles.
NOTE
A flow meter (accessory) may be fitted between the
machine's water supply connector and the water supply
hose.
1. Connect the water regulator to the machine.
2. Connect the water supply (hose coupling).
6.1.6 Fitting the water collection system
(accessory) 5
WARNING
Use of the water collection system in conjunction with
a wet-type industrial vacuum cleaner is a mandatory
requirement for work on ceilings. The machine must
be positioned at an angle of 90° to the ceiling. The
seal used must be of the correct size for the diamond
core bit diameter.
NOTE
Use of the water collection system allows water to be
led away in controlled fashion, thus avoiding a mess
or damage to the surrounding area. Best results are
achieved with a wet-type industrial vacuum cleaner.
1. Release the hexagon-head screw at the front of the
rail.
2. Push the water collector holder into position.
3. Fit the hexagon-head screw and tighten it.
4. Fit the water collector between the two moveable
arms of the water collector holder.
5. Press the water collector against the base material
by turning the two screws on the water collector
holder.
6. Connect a wet-type industrial vacuum cleaner to the
water collector or fit a length of hose through which
the water can drain away.
6.1.7 Fitting the diamond core bit 6
DANGER
Do not use damaged core bits. Check the core bits for
chipping, cracks, or heavy wear each time before use.
Do not use damaged tools. Fragments of the workpiece
or a broken core bit may be ejected and cause injury
beyond the immediate area of operation.
NOTE
Diamond core bits must be replaced when the cutting
performance and/or rate of drilling progress drops sig-
nificantly. This generally is the case when the segments
reach a height of less than 2 mm.