Operating Instruction DCH 300 / DCH 300-X (01)

10 English 2149877
*2149877*
• The voltage provided by the power source must remain within +5 % and –15 % of the tool’s rated
voltage.
• Frequency: 50 to 60 Hz (never above 65 Hz)
• The power source must be equipped with automatic voltage regulation and starting boost.
ATTENTION
Risk of damage Switching on or switching off other power tools or appliances connected to the generator
or transformer may cause undervoltage and/or overvoltage peaks, resulting in damage to the cutter.
▶ Never operate other power tools or appliances from the generator or transformer at the same time. Where
applicable, use a generator or transformer designed for simultaneous operation of the cutter and vacuum
cleaner.
5.1.2 Use of extension cords
WARNING
A damaged supply cord presents a hazard! Do not touch the supply cord or extension cord if damaged
while working. Disconnect the supply cord plug from the power outlet.
▶ Check the appliance’s supply cord at regular intervals and have it replaced by a qualified specialist if
found to be damaged.
• Use only extension cords of a type approved for the application and with conductors of adequate
cross-section. Otherwise the performance of the appliance may be affected and the cord may overheat.
• Regularly check the extension cord for damage.
• Replace damaged extension cords.
• When working outdoors, use only extension cords that are approved and correspondingly marked for
this application.
Recommended minimum conductor cross-sections and maximum power cord lengths for 120V sup-
ply voltage
Power cord AWG 16 AWG 14 AWG 12 AWG 10
Conductor cross-section 1,31 mm² 2,08 mm² 3,31 mm² 5,26 mm²
Conductor cross-section 2,58 kcmil 4,11 kcmil 6,53 kcmil 10,4 kcmil
Power cord length 25 m 30 m 50 m 100 m
Power cord length 75 ft 100 ft 150 ft 250 ft
5.1.3 Checking the portable residual current device (PRCD)
DCH 300–X
1. Plug the power tool’s supply cord into a grounded power outlet.
2.
Press the ON button on the portable residual current device.
◁ The indicator shows.
3.
Press the Test button on the portable residual current device.
◁ The indicator goes out.
▽ The indicator does not goes out.
▶ Do not use the power tool. Have it repaired by a qualified specialist using genuine Hilti spare
parts.
5.2 Fitting a diamond cutting disc 3
@
M16 × 1.5 clamping nut
;
Ø 60 mm clamping flange
=
Diamond cutting disc
%
Ø 60 mm reversible flange
&
Arbor
1. Observe the instructions concerning correct selection of suitable cutting discs → page 9 and the
dimension and format specifications for diamond cutting discs → page 9.
2. Disconnect the mains plug from the power outlet.
3. Clean the clamping flange and the clamping nut.
Printed: 23.10.2018 | Doc-Nr: PUB / 5459266 / 000 / 00