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a drill bit. This feature also prevents the gearing and
electric motor from stalling. The torque limiting clutch
has been factory-set and cannot be adjusted.
Electronic Overload Protection
The electronic overload protection offers additional
safety: if the current approaches a certain limit,
the warning indicator LED (c) lights up to indicate
that the machine switches into overload mode if
operation is continued at the same pressure level.
Reduced operator pressure on the machine makes
the electronics switch back into normal mode.
If continuous overload pressure is applied, the
machine switches off. Thus, overheating of
the motor windings is avoided. The machine is
operational again after the load has been released.
Thermal Protection
After the machine has worked in overload for a
long period of time, the thermal protection shuts
off the machine to protect the motor. The machine
will be operational after the thermal protection has
cooled down. The time of cooling down depends
on the overheating of the motor and the ambient
temperature.
Water Supply
The integrated water swivel works directly through
the motor shaft to provide continuous cooling of the
core bit in wet drilling applications.
Electrical Safety
The electric motor has been designed for one
voltage only. Always check that the power supply
corresponds to the voltage on the rating plate.
Your D
WALT tool is double insulated in
E
accordance with EN 60745; therefore no
earth wire is required.
If the supply cord is damaged, it must be replaced
by a specially prepared cord available through the
D
WALT service organization.
E
Using an Extension Cable
If an extension cable is required, use an approved
3–core extension cable suitable for the power
input of this tool (see technical data).The minimum
2
conductor size is 1.5 mm
; the maximum length is
30 m.
When using a cable reel, always unwind the cable
completely.
Mains Plug Replacement
(U.K. & Ireland Only)
If a new mains plug needs to be fitted:
• Safely dispose of the old plug.
• Connect the brown lead to the live terminal in
the plug.
• Connect the blue lead to the neutral terminal.
Follow the fitting instructions supplied with good
quality plugs. Recommended fuse: 13 A.
Fitting a Mains Plug to 115 V Units
(U.K. & Ireland only)
• The plug should be fitted by a competent
person. If you are in doubt, contact an
authorized D
WALT repair agent or a qualified
E
electrician.
The plug fitted should comply with BS EN 60309
(BS4343), 16 Amps, earthing contact position 4th.
DI-switch (in-line protector PRCD)
(fi g. 1)
The machine is equipped with a portable residual
current device (PRCD) (u), which protects the user
against electric shock by interrupting the circuit
when a leakage current of 10 mA or greater is
detected. For 115 V units the rated leakage current
is 6 mA.
WARNING: Never operate the machine
without the PRCD in place. Do not
use the machine if the PRCD does not
function properly. For the PRCD to work,
the machine must be connected to an
earthed wall socket.
TO SWITCH ON THE RCD
I = ON (red LED lights up).
Switch on the machine (also refer to the section
Switching On and Off).
To switch off, proceed in reverse order.
TO TEST THE RCD
O = Test button: the switch must break the circuit
(machine switches off).
WARNING:
• If in the test mode the switch does
not break the circuit, we recommend
that the unit is inspected by an
authorized D
WALT repair agent.
E
EN GL IS H
37
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