Electrical Connection; Water Connection; Gear Change - Weka DK26L Betriebsanleitung

4.1

Electrical connection

According the European standards EN62841-1 and EN62841-3-6, the electrical connection of diamond
core drills with water supply must be operated via a residual current device (RCD, PRCD) and to a
properly earthed socket.
In accordance with these regulations, the DK26/28/32/34 is fitted with an inline protector (PRCD) (1b)
mounted in the cord.
This contains both, RCD protection and undervoltage tripping.
The PRCD must be switched on using the ON key after the power plug has been inserted into the socket
outlet. In the event of a voltage drop, the PRCD will switch off and must then be switched on again once
the power supply has been reestablished.
The rated current, i.e. the fault current at which the PRCD switches off, is 10 mA.
The PRCD must not lie in water. It must be checked for perfect functioning always before
starting the work. Never operate a diamond core drilling machine without RCD or PRCD
directly from the mains system.
4.2

Water connection

Connect the water to the water supply via the plug-in nipple.
Attention: max. water pressure 3 bar.
Please use a GARDENA coupling as the connecting piece to the machine. This can be obtained from a
garden center or builders' merchant.
Use only clean water, as dirty water will cause the seals to wear very quickly.
4.3 Assembling at the drill rig
The safety and operating instructions for the drill rig being used are to be strictly observed.
The DK26/28/32/34 is fastened at the gear foot (see illustration) with 4 M8 screws on the rig (2). Choose
screws which a length of thread engagement of at least 15 mm. Place the machine only in a stable rig
which has precise guides free from clearance. Ensure that the machine axis is absolutely parallel to the
upright column. Only use rigs with sufficient stability.
4.4 Mains switch (1c) and integral over current 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.
Before switching the machine on again, ensure that the drill bit can be turned easily and is not jammed in
the drill hole.
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 change

The DK26/28/32/34 has a 3-speed gear.
Never use force to switch over, and only switch over when the machine is decelerating or has stopped.
Always select the appropriate speed for the drill diameter (see table and rating plate on the machine).
4.6 Friction clutch
The integrated friction clutch protects operating personnel, the machine and the tool against high
mechanical overloads.
Please ensure that the release time of the clutch is not more than 3 - 4 seconds, because
otherwise wear and heat will increase rapidly.
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