Hilti DD 350, Manual

Page: 44 / 664

34 English
5.2.5 Operating the diamond core drilling machine 14
WARNING
Risk of personal injury and material damage The diamond core drilling machine may become
damaged and the risk of electric shock is increased.
▶
Use of the water collection system in conjunction with a wet-type industrial vacuum cleaner is a
mandatory requirement for wet drilling overhead.
DANGER
Risk of personal injury and material damage The wet-type industrial vacuum cleaner switches on
and off with a delay. This allows water to run over the diamond core drilling machine. The diamond
core drilling machine may become damaged and the risk of electric shock is increased.
▶
When drilling in an upward direction, the wet-type industrial vacuum cleaner must be switched on
manually before opening the water supply valve and switched off again manually after closing the
water supply valve.
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.
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 15
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.
Printed: 02.11.2017 | Doc-Nr: PUB / 5145256 / 000 / 04