Types Of Work; Selecting The Speed; Portable Residual Current Device (Prcd) - Hilti DD 350 Manual Del Usuario

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5.2 Types of work

5.2.1 Keep the danger zone clear
The shaded area in the illustration defines the danger zone round the diamond core drilling machine.
• When operating the machine, always keep at least 15 cm clear of the core bit.
• Position yourself behind the drill stand while drilling is in progress.

5.2.2 Selecting the speed

Note
Press the switch only when the tool is stationary.
1. Set the selector switch to suit the diameter of the core bit used.
2. Turn the switch to the recommended setting while turning the core bit by hand at the same time.

5.2.3 Portable residual current device (PRCD)

1. Plug the diamond core drilling machine's supply cord into a grounded socket outlet.
2. Press the ON button on the PRCD.
◁ The indicator lights up.
3. Press the TEST button on the PRCD.
◁ The indicator goes out.
WARNING
Risk of injury Risk of electric shock.
▶ If the indicator continues to light up, further operation of the diamond core drilling machine
is not permissible. Have your diamond core drilling machine repaired by Hilti Service.
4. Press the ON button on the PRCD.
◁ The indicator lights up.
5.2.4 Using the hole-starting function
1. Advance the core bit as close as possible to the work surface without brining it into contact with the work
surface.
2. Press the ON switch on the diamond core drilling machine.
3. Press the ON switch on the diamond core drilling machine again.
◁ The core bit rotates slowly (21 rpm)
4. Press the core bit against the base material.
5. After approx. 5 seconds, press the ON switch again.
◁ The core bit rotates at normal speed.
6. Continue the drilling operation.
Printed: 02.11.2017 | Doc-Nr: PUB / 5145256 / 000 / 04
English 33