Weka DK08 Betriebsanleitung Seite 16

4. P R E P A R A T I O N
Make sure that the machine did not get damaged by the transport. Check that the rated voltage indicated
on rating plate conforms with main voltage.
4.1 Connection to the power supply
According to the general safety precautions the electric connection of diamond core drills with water
supply is on principle to be done by a ground fault current interrupter (GFCI).
Likewise, those machines are only to be used at sockets with protective plug reception, earthed
according to the regulations.
According to those regulations WEKA core drills with water supply are provided with a PRCD inline
protector assembled between the cord.
The PRCD includes a ground fault current interrupter as well as an undervoltage breaker.
The PRCD is ready for service after connecting the electric main by pressing the ON button. If the
voltage is disconnected, the PRCD switches off and is, after the voltage returns, to start once more.
ATTENTION: Do not put the PRCD into water. It is regularly to be checked on perfect
functioning by pressing the TEST-key. Never use a core drill without a GFCI being directly
connected to the mains connection (machines without PRCD: Never operate the machine
without an isolating transformer).
4.2 Water supply
Connect the machine with the water supply by using a GARDENA coupling to the Quick Connect Nipple.
ATTENTION: maximum water pressure 3 bar.
Use only clean water because the sealing wears more quickly with dirty water.
If water comes out of the indicator hole the rotary shaft seals are to be replaced immediately.
It is preferable to have this done in an authorized specialist´s workshop only.
4.3 Installation in the drill stand
In the drill stand, the machines are fastened by clamping the gearbox (Ø 60 mm). Put the machine into
a solidly designed drill stand that is equipped with a clamping ring that exactly fits the machine. Divided
clamping devices which do not tighten exactly in the middle of the gear's neck are unsuitable and
damage it.
Be careful that the machine's axis is absolutely parallel to the stand column. We recommend our drill rig
KS13.
4.4 Motor switch (1e) and overload protection
After having switched on the motor starts softly. If the machine is being overloaded, the motor electronic
switches over to the pulsating operation for showing the operator the overload. If the force is then not
reduced, the motor switches off after a few seconds. After switching the machine off and on again, the
motor start again softly.
The motor electronic can temporarily be used on 260 Volt (resp. 140 Volt on 110 Volt machines). Higher
voltages however can cause irreparable damages. Please note that when operating the machine via a
generator, this does not generate higher voltage peaks.
4.5 Gear changing
The DK16/17/18 is equipped with a 3-speed gear unit. The DK08/09 has a 2-speed gear. Please do
never change gears forcibly but only when the machine is just coming or has already come to a stop.
4.6 Safety clutch
The integrated safety clutch protects the operator, the machine and the tools against high mechanical
overstrain.
Please notice that the safety clutch is activated after only 2-3 seconds because otherwise the
wear and the development of heat increases greatly.
5. C O M I S S I O N I N G
5.1 Diamond core bits
The tool fixture is prepared for standard drill bits with G ½", 1 1/4" UNC or the new M33/3 thread.
Additional description 03 (e.g. DK 1603) - combined spindle with female thread G ½" + male thread 1
1/4" UNC. So it is possible to fix tools with G ½" as well as 1 1/4" UNC thread.
Additional description 08 (e.g. DK 1108) - external thread M33/3.
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