Hilti DD 150-U Mode D'emploi page 23

6.5 Selecting the speed
CAUTION
Risk of wear and tear Risk of damage to the gearing
▶ Do not attempt to change gear while the machine is running. Wait until the arbor comes to a complete
stop.
▶ While using one hand to turn the core bit, set the switch to the recommended setting.
6.6 Portable residual current device (PRCD)
An isolating transformer must be used for diamond core drilling machines without PRCD.
1. Plug the diamond core drilling machine's supply cord into a grounded socket outlet.
2. Press the "I" or "RESET" button on the PRCD.
➥ The indicator lights up.
3. Press the "0" or "TEST" button on the PRCD.
➥ The indicator goes out.
WARNING
Risk of injury due to electric shock! Do not continue operating the diamond core drilling machine if the
indicator on the ground fault circuit interrupter does not go out when the 0 or the TEST button is pressed.
▶ Have your diamond core drilling machine repaired by Hilti Service.
4. Press the "I" or "RESET" button on the PRCD.
➥ The indicator lights up.
6.7 Hand-guided dry drilling
Allowing dust to build up in quantity inside the core bit can cause imbalance.
▶ Remove the dust from the core bit.
6.8 Dry-drilling with dust removal
Allowing dust to build up in quantity inside the core bit can cause imbalance.
▶ To prevent electrostatic effects, use an anti-static vacuum extractor.
6.9 Use of the two-part hole-starting aid
CAUTION
Risk of injury caused by incorrect use! Parts can come off the hole-starting aid if it is not pressed against
the work surface.
▶ When a two-part hole-starting aid is used, do not run the diamond core drilling machine without the
hole-starting aid pressed against the work surface.
A different hole-starting aid is required for each core bit diameter.
1. Fit the hole-starting aid into the open end of the diamond core bit.
2. When you start drilling apply only light pressure until the core bit has centered itself. Then apply more
pressure. Drill a guide cut 1/8"-3/16" deep.
3. Release the on/off switch to stop the machine. Wait until the core bit comes to a complete stop.
4. Remove the hole-starting aid from the core bit.
*434950*
Printed: 09.08.2019 | Doc-Nr: PUB / 5069547 / 000 / 06
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434950 English 15