Hilti DD 160 Manual page 39

6.2 Operating 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 mains plug into an earthed/grounded power outlet.
2. Press "I" or "RESET" on the portable residual current device (PRCD).
➥ The drilling performance indicator shows orange.
3. Press "0" or "TEST" on the portable residual current device (PRCD).
➥ The drilling performance 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 "I" or "RESET" on the portable residual current device (PRCD).
➥ The drilling performance indicator shows orange.
6.3 Operating diamond core drilling machine without a wet-type industrial vacuum extractor
1. Slowly open the water flow regulator until the water flows at the desired rate.
The diamond core drilling machine can be operated with or without water collection system. With
the water collection system, the cooling water is drained away through a hose, without the water
collection system the water runs off in an uncontrolled manner. For operation with water collection
system, first install the water collection system → page 31.
In both applications, upward drilling is not allowed.
2. Push the ON/OFF switch to the "I" position.
3. Release the carriage lock.
4. Turn the hand wheel until the diamond core bit is in contact with the work surface.
5. When you start drilling apply only light pressure until the core bit has centered itself and only then,
increase the pressure against the working surface.
6. Observe the drilling performance indicator.
Initially, the drilling performance indicator shows orange. Optimum drilling performance is achieved
when the drilling performance indicator shows green. Reduce the pressure against the work
surface if the drilling performance indicator shows red.
6.4 Operating diamond core drilling machine with a wet-type industrial vacuum extractor
WARNING
Danger of electric shock! There is a possibility of water flowing over the motor and cover if the vacuum
removal system is faulty.
▶ Cease operations immediately if the vacuum removal system is not working.
1. Install the water collection system → page 31 and connect the wet-type industrial vacuum extractor.
2. Switch on the wet-type industrial vacuum extractor; do not use automatic mode.
3. Slowly open the water flow regulator until the water flows at the desired rate.
4. Push the ON/OFF switch to the "I" position.
5. Release the carriage lock.
6. Turn the hand wheel until the diamond core bit is in contact with the work surface.
7. When you start drilling apply only light pressure until the core bit has centered itself and only then,
increase the pressure against the working surface.
8. Observe the drilling performance indicator.
Initially, the drilling performance indicator shows orange. Optimum drilling performance is achieved
when the drilling performance indicator shows green. Reduce the pressure against the work
surface if the drilling performance indicator shows red.
*434951*
Printed: 09.08.2019 | Doc-Nr: PUB / 5069586 / 000 / 08
434951
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English 33