Hilti DD 350-CA Mode D'emploi page 31

NOTE
In addition to these operating instructions, the information given in the operating instructions for the other components
of the core drilling system, especially the operating instructions for the optional drilling feed unit, must always be
observed.
WARNING
The machine may be operated only when connected to an adequately-rated electric supply equipped with an
earth (ground) conductor.
DANGER
Use only the genuine Hilti accessories or ancillary equipment listed in the operating instructions. Use of
accessories or ancillary equipment not listed in the operating instructions may present a risk of personal injury.
2.2 Use of the system with various items of equipment
Equipment
With water collection system
System without water collection
system
The core drilling machine complies with IP55 requirements and thus features protection against sprayed water. This
allows drilling to be carried out in all directions without use of a wet-type vacuum cleaner.
The machine may be operated only when an adequate supply of cooling water is ensured (at least 0.5 l/min at a water
temperature of max. 30°C) .
When the drilling column (rail) is extended to a length of 2 m or more, an additional support or brace must be fitted,
e.g. a bracing spindle.
2.3 Indicators on the control panel for service, cooling/voltage and drilling power
Service indicator
Indicators for cooling and voltage er-
ror
Drilling performance indicator
2.4 Gears and the corresponding core bit diameters
Core bit diameter
Gear
(mm)
1 52...62
2 72...92
3 102...112
4 122
5
127...142
Core bit diameter
52...250 mm
52...500 mm
Lights
Blinks for a short time
Blinks continuously
Lights
Blinks
Orange light
Green light
Red light
Core bit diameter
(inches)
2...2³⁄₈
2³⁄₄...3¹⁄₂
4...4¹⁄₂
4³⁄₄
5...5¹⁄₂
Drilling direction
All directions
All directions
Bring the core drilling machine to a Hilti
Service Center
Faults or errors in the machine (see
Troubleshooting section)
Bring the machine to a Hilti Service
Center immediately (failure to follow
this instruction may affect entitlement
to benefits under the optional 2-year full
service agreement!)
Check the water flow rate
Check the electric supply (see
Troubleshooting section)
Low contact pressure, e.g. when start-
ing drilling
Optimum contact pressure (after the
hole has been started)
Contact pressure too high
Speed under no load
220-240 V (/min)
667
667
667
619
571
Standard working
length
500 mm
500 mm
Speed under no load
110 V (/min)
667
667
619
571
524
23
en