Hilti DD 350 Mode D'emploi Original page 24

WARNING
Risk of personal injury and material damage The water collector cannot function correctly during
drilling in an upward direction at an angle. The diamond core drilling machine may become damaged
and the risk of electric shock is increased.
▶ Do not drill in an upward direction at an angle.
1. Slowly open the water flow regulator until the water flows at the desired rate.
2. Press the ON switch on the diamond core drilling machine.
3. Release the carriage lock.
4. Turn the hand wheel until the core bit is in contact with the base material.
5. When you start drilling apply only light pressure until the core bit has centered itself. Then apply more
pressure.
6. Watch the drilling performance indicator and adjust contact force accordingly.
5.2.6 Operating the diamond core drilling machine dry
DANGER
Risk of personal injury and material damage The diamond core drilling machine may become
damaged and the risk of electric shock is increased.
▶ When drilling in an upward direction, stop working if the suction removal system stops working
(e.g. the wet-type industrial vacuum cleaner is full).
WARNING
Risk of personal injury and material damage The water collector cannot function correctly during
drilling in an upward direction at an angle. The diamond core drilling machine may become damaged
and the risk of electric shock is increased.
▶ Do not drill in an upward direction at an angle.
Note
Wear a dust mask
1. Switch on a dust extractor and compressed air.
2. Set the 3-way valve on the core drilling machine to dry drilling.
3. Press the ON switch on the diamond core drilling machine.
4. Release the carriage lock.
5. Turn the hand wheel until the core bit is in contact with the base material.
6. When you start drilling apply only light pressure until the core bit has centered itself. Then apply more
pressure.
7. Watch the drilling performance indicator and adjust contact force accordingly.
5.2.7 Switching off the diamond core drilling machine
WARNING
Risk of personal injury and material damage The diamond core bit fills with water during overhead
drilling. The diamond core drilling machine may become damaged and the risk of electric shock is
increased.
▶ As a first step, carefully allow the water to drain away after completing overhead drilling. This is
done by disconnecting the water supply from the water flow regulator and draining the water by
opening the water flow regulator. Do not allow the water to run over the motor and cover.
14 English
Printed: 18.10.2017 | Doc-Nr: PUB / 5236054 / 000 / 02
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