Hilti DD 150-U Manual De Instrucciones página 44

▶ The product may be operated only when connected to an adequately rated electric supply equipped with
an earth (ground) conductor.
▶ Before beginning work, check the working area (e.g. using a metal detector) to ensure that no concealed
electric cables or gas and water pipes are present. External metal parts of the product can become live,
for example, when an electric cable is damaged accidentally. This constitutes a serious risk of electric
shock.
▶ Make sure that the supply cord cannot be damaged as the carriage advances.
▶ Never operate the product without the supplied PRCD (for products without PRCD: Never operate the
machine without an isolating transformer). Test the PRCD each time before use.
▶ Check the machine's supply cord at regular intervals and have it replaced by a qualified specialist if
found to be damaged. If the machine's supply cord is damaged it must be replaced with a specially
prepared and approved supply cord available from Hilti Customer Service. Check extension cords at
regular intervals and replace them if found to be damaged. Do not touch the supply cord or extension
cord if it is damaged while working. Disconnect the supply cord plug from the power outlet. Damaged
supply cords or extension cords present a risk of electric shock.
▶ Never operate the product when it is dirty or wet. Dust (especially dust from conductive materials) or
dampness adhering to the surface of the machine may, under unfavorable conditions, lead to electric
shock. Dirty or dusty machines should thus be checked by Hilti Service at regular intervals, especially if
used frequently for working on conductive materials.
▶ Tip the diamond core drilling machine in order to empty a filled core bit. Make sure that the water does
not get onto the diamond core drilling machine.
Workplace
▶ Approval must be obtained from the site engineer or architect prior to beginning drilling work. Drilling
work on buildings and other structures may influence the static equilibrium of the structure, especially
when steel reinforcing bars or load-bearing components are cut through.
▶ If the drill stand is not properly fastened, always move the diamond core drilling machine mounted on
the drill stand all the way down in order to prevent the stand from falling over.
▶ Keep the supply cord, extension cord, water hose and vacuum hose away from rotating parts of the
machine.
▶ Use of the water collection system in conjunction with a wet-type industrial vacuum extractor is a
mandatory requirement for wet drilling overhead.
▶ Use of the vacuum securing method without an additional means of fastening is prohibited for drilling in
an upward direction.
▶ For horizontal drilling, the drill stand may not be used without being additionally secured.
▶ In the hand-guided mode, always hold the diamond core drilling machine securely with one hand on the
on/off switch.
▶ Do not switch on the diamond core drilling machine until it is in the desired position.
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