Safety Precautions - Hilti DC-SE20 Operating Instructions Manual

Safety precautions

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Important
Always observe the enclosed safety precautions.
Notes on safety and accident prevention
● Always pull the plug out of the mains socket before working on the machine. Check the
plug and supply cord for any damage. Have a specialist replace them immediately if
any damage is discovered. Never connect a third conductor as an earth (ground) in
double-insulated machines.
● Only insert the plug into a mains socket when the machine is switched off.
● Only use an approved extension cable and coupling (plug and socket) when working out-
side.
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Printed: 08.07.2013 | Doc-Nr: PUB / 5069486 / 000 / 01
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● Keep the machine and discs in a safe place out of the reach of children.
● Always wear safety goggles, protective gloves and ear protectors when working.
● Never use the slitting machine without the side guard in place for safety's sake.
● Make sure the workplace is well ventilated.
● Only use the machine with an industrial vacuum cleaner.
● Ensure the vacuum cleaner is suitable for removing rock and stone dust, i.e. a well fun-
ctioning vacuum cleaner with a power rating of at least 1200 W, e.g. the Hilti TDA-VC40,
must be used.
● Wear respiratory protection additionally, i.e. a mask, as per EN 149 if these measures
are not sufficient. The recommended filter class is P2.
● Never slit material containing asbestos.
● Make sure that no flammable materials are in the vicinity.
● Observe national regulations, such as the accident prevention regulations of a trade asso-
ciation.
● Only use original spare parts.
Electronic regulation and control
Start-up current limitation: When the tool is switched on the current is many times higher than
the nominal current. An electronic start-up current overload protector reduces the starting cur-
rent to such an extent that the mains supply fuse is not tripped.
Idling speed limitation: An electronic speed no-load regulator keeps the idling speed constant
at 7500 /min
Motor protection
Overload protection: If the motor is overloaded by the operator applying too much pressure, the
current input is reduced so that the discs rotate only slowly. If the working pressure is reduced,
the input current increases again and the motor runs at the normal speed.
Overheating protection: If the motor is continually overloaded, an additional thermal overload
protector automatically reduces the current input. The machine can only be restarted by opera-
ting the on/off switch, but only if the motor windings have cooled down. The machine should be
run under no-load conditions for better cooling of the motor windings.
Before operation
Make sure the voltage of the mains electric supply agrees with the data on the tool rating
plate.