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once you checked that the device works properly,
switch the S lever to ON, and press the button (P)
what gives power to the sockets. On the contrary,
the button O cuts power to the sockets;
if, when working, the residual current device goes
off, cutting power to the machine: stop drilling, turn
the ON/OFF switch off (figure 5.2) and eliminate the
cause of dispersion asking to an authorized service
centre.
on the rear of the twin-motor core drill motor are
located two lights shown in figure 5.2 with I. When
both lights are on the two electric motors are
working properly. If one light is off, means that the
corresponding motor has a problem, for example
the motor brushes are worn. When a light goes off
stop drilling and bring ask an authorized service
centre to fix the problem.
ON/OFF switch
Refer to figure 5.1 and 5.2 in order to understand how to use
the on/off switch:
single phase core drill motors use the switch shown
in figure 5.1;
twin-motor core drill motors use the switch shown in
figure 5.2;
Warning: for your safety, you must get
familiar
with
understand how you can switch the machine
off in case of emergency.
Connection to a water supply
Wet drilling needs insertion of water into the core drill motor.
Refer to figure 2.
use only the water pipe provided with your core drill
motor. The water pipe includes also a valve (C) and
a quick hose connector (D);
the maximum pressure of incoming water is 4 bar;
use just clean water;
prevent water from entering the electric motor or
other electrical components;
check at regular intervals that none of the water
system components are damaged. Check in
particular the valve (C), the quick hose connector
(D) and the pipe.
Checks
and
precautions
structural damage and damage to the
plant
Before starting any drilling activity, talk with the construction
manager or the planner in order to make sure that the
drilling doesn't:
make any damage to the structure of the building
and doesn't change the structural characteristics of
the construction;
damage any water or gas pipeline or any electric
mains.
Checks and precautions to avoid damage
caused by the fall of the core
before drilling, make sure that the possible falling
out of core from the other side of the hole doesn't
make any damage. In any case, bound the area
where the core can fall and signal the danger;
if the possible fall of the core can make damage,
make a system that holds the core when drilling is
completed.
the
switch
in
order
to
avoid
Core bit choice
The maximum and minimum core bit diameter is reported on
the data plate on your core drill motor. Do not use core bit
with different diameter from the one prescribed.
Warning: for your safety do not use different core
bits from the ones prescribed for your specific
application
The core bit is different depending on the material to be
drilled: consult your dealer about the correct core bit for your
application. The not suited core bit or a core bit not sharp
can overload the motor leading to: damage to the motor,
long drilling time and excessive diamond segments wearing.
Diamond
replacement
Follow these directions, refer to figure 4:
before mounting or removing the core bit (F) always
unplug the core drill motor;
lubricate the core bit and the core bit spindle thread
in order to make easier, after use, to remove the
core bit;
if you your core bit connection doesn't match the
core bit spindle (ex. 1/2 G), use a proper adapter
available among BERNER accessory;
to
if available interpose a quick release device (E)
between the core bit spindle and the core bit (as
shown in figure 4);
before starting to drill make sure that the core bit is
firmly screwed on the core bit spindle.
Stand
Warning: for your safety, make sure that the drill
stand you are using is compatible with the
diameter of the core bit and that it is compatible
with the power of your core drill motor, shown on
the data plate.
The minimum number of bolts you must use to fasten your
drill motor is written on the Technical Data sheet.
Fastening the work piece and size of the
work piece
if the work object is a block and not part of a
structure, fasten it in order to prevent its movement;
prevent the work piece from shifting, moving or
falling when you are cutting.
Environmental conditions
don't expose the machine to rain, ice or snow;
prevent water or any other liquid from coming into
contact with the electric parts of your machine;
do not use the core drill in explosive atmospheres,
for instance in presence of inflammable liquids, gas
or dust. The electric core drill motor produces
sparks which can ignite dust or smoke.
Overhead drilling (ceiling drilling)
You can perform overhead drilling (upward) when the core
drill is used in the dry mode. Overhead drilling is allowed in
the wet mode ONLY if you use proper water collecting
devices in order to avoid water coming into contact with any
electrical parts. These devices are available as BERNER
accessories.
Warning: the possible drop of the core can be
dangerous. Watch out!
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