Before Use; Operation - Hilti DD EC-1 Operating Instructions Manual

Before use

It is essential that the safety precautions print-
ed in these operating instructions are read
and observed.
The tool may be used for drilling work only by
trained personnel.
The mains voltage must correspond to the infor-
mation on the type plate.
If extension cables are used: Only extension cables
of a type approved for the intended use and of ade-
quate cross section may be used. Failure to observe this
point may result in reduced performance and could cause
the cable to overheat. Damaged extension cables must
be replaced.
The recommended cable cross-sections and maxi-
mum lengths are:
Conductor cross-section
Mains voltage 1.5 mm
100 V
110–120 V 20 m
220–230 V 50 m
Before beginning drilling, ensure that the nec-
essary safety precautions are taken to prevent
injury or damage caused by falling cores or
water escaping from the hole into rooms or areas below
where the holes are being drilled.
Drilling through reinforcing bars
steel is indicated by slow progress and clear water at
the core bit.
Before using the tool, ensure that the chuck is
clean and the core bit to be used is not damaged
(e.g.the core bit must not wobble or run out of true
when the chuck lever is closed). Worn or broken parts
on the electric tool or core bit must be replaced imme-
diately.
When drilling overhead, for safety reasons,
the following items of equipment must be
used:
1. Water collector assembly with suitable water col-
lector sleeve
2. DD-REC1 water recycling system, or
3. A suitable wet-type vacuum cleaner with the cor-
rect adaptor for the water collector hose
4. PRCD portable residual current device (integrated
in the supply cord, isolating transformer for GB))
The grip of the tool must not be used for attach-
ing lifting equipment (e.g. block and tackle, crane,
etc.).
18
Printed: 08.07.2013 | Doc-Nr: PUB / 5069612 / 000 / 01
2 2.0 mm 2 2.5 mm 2 3.5 mm
20 m 40 m
40 m
80 m
Obtain permission form the
architect or site engineer
before drilling through rein-
forcing bars. Drilling through
Use only DD-C core bits.
Do not apply excessive pressure when drilling. This will
not increase drilling performance.
Only pure water, without additives, may be used for cool-
ing and flushing when drilling. Use of the liquids listed
in the DD-REC1 operating instructions is permissible
when the DD-REC1 water recycling unit is used. The cor-
responding information must be observed.
When setting anchors, the applicable product and
test / inspection regulations must be observed.

Operation

Assembling the tool
– Take the tool out of the toolbox.
– Slide the water collector rods into the openings pro-
2
vided on the front side of the tool as far as they will
go .
– As you do so, keep button
the water collector in position on the gear housing by
releasing the button when the rods have been fully
inserted .
– Slide the button
lector to the length corresponding to the core bit used
(position 1 < 150 mm working length; position 2 :
300 mm working length)
– Always use the supplied water collector system.
– Always ensure that the diameter of the water collec-
tor sleeve used corresponds to the nominal diameter
of the core bit used.
– Always screw the side handle and depth gauge into
one of the threaded bushings provided on the gear
housing .
– Ensure that the supply cord is not plugged
in.
Inserting the core bit
– Open the chuck by lifting the operating lever
upwards .
– Check that the core bit connection end and the chuck
are clean and undamaged.
– Check that the slots in the cutting edge of the core bit
to be used still have a depth of at least 0.5 mm. If not,
the core bit should be replaced as there is otherwise
a risk of it becoming stuck in the hole
– Pivot the water collector about its mounting axis as
far as it will go.
– From above, insert the cutting edge of the core bit
into the water collector sleeve
– Guide the connection end of the core bit into the recess
in the chuck.
– Rotate the core bit in a clockwise direction while press-
ing it into the chuck as far as it will go
– Return the chuck operating lever
position.
depressed and engage
to the right to adjust the water col-
.
.
.
.
to its original
30°