Main Features Of The Tool; Intended Uses; Before Use - Hilti DD EC-1 Mode D'emploi

Main features of the tool

– Drilling machine with TOPSPIN kinematics, i.e. delib-
erate orbital movement of the core bit and chuck
– Class I electrical protection
– Belt drive (uses no oil)
– Mechanical slip clutch
– Electronic motor protection
– Rubber-covered grip and side handle
– Chuck system for DD-C core bits (150 and 300 mm /
6" and 12" effective core depth)
– Quick-change core bit connection end system
– Infinitely variable speed control
– Automatic water on / off function
– Manual water volume regulation
– Built-in water flow rate indicator
– Lockable trigger switch
– Removable water collector holder
– Removable supply cord with keyed socket connector
and GFCI ground fault circuit interruptor
– Depth gauge
– Bubble levels

Intended uses

The tool is intended for the following uses:
– Drilling holes (diamond core drilling) of 10–35 mm
"–1 ") diameter in reinforced concrete, mason-
( 3 / 5 /
8 16
ry and natural stone.
– To be used exclusively for wet drilling and in con-
junction with the water collector and corresponding
water collector seal rings.
– The tool must be connected to a power supply pro-
viding a voltage and frequency in compliance with the
information given on the type rating plate.
– The tool may be used only when connected to a pow-
er supply equipped with a ground conductor and of
adequate power rating.
– The tool may be used only with the power supply cord
supplied with the tool, which is equipped with a keyed
socket connector and built-in GFCI.
– In accordance with national safety regulations, the
safety function of the ground conductor must be test-
ed at regular intervals.
– Before use, the GFCI must be tested for correct func-
tionality.
– Only the core bits and accessories designed for use
with this tool may be used.
The tool may be handled only as described in these oper-
ating instructions (care, maintenance, assembly, use,
etc.). Manipulation of the tool in ways other than as
described in these operating instructions may negatively
affect its functionality.
The general and specific safety rules listed in the oper-
ating instructions must be observed.
The position and dimensions of the holes drilled must
be approved by the design engineer, architect or person
in charge of the building project (building statics).

Before use

It is essential that the safety precautions print-
ed in these operating instructions are read
and observed.
The power voltage must correspond to the infor-
mation on the type rating plate.
If extension cables are used: Only extension cables
of a type approved for the intended use and of ade-
quate cross section may be used. Failure to observe this
point may result in reduced performance and could cause
the cable to overheat. Damaged extension cables must
be replaced.
The recommended extension cord AWG size maximum
and maximum lengths are:
Extension Cord Table
Conductor cross-section
Voltage 1.5 mm
110–120 V 20 m
Before beginning drilling, ensure that the nec-
essary safety rules are observed to prevent
injury or damage caused by falling cores or
water escaping from the hole into rooms or areas below
where the holes are being drilled.
Before using the tool, ensure that the chuck is clean
and the core bit to be used is not damaged (e.g.
the core bit must not wobble or run out of true when the
chuck lever is closed). Worn or broken parts on the elec-
tric tool or core bit must be replaced immediately.
When drilling overhead, for safety reasons,
the following items of equipment must be
used:
1. Water collector assembly with suitable water collec-
tor seal ring
2. DD-REC1 water recycling system, or
3. A suitable wet-type vacuum cleaner with the correct
adaptor for the water collector hose
4. Ground fault circuit interruptor (GFCI) (integrated in
the supply cord)
Use only DD-C core bits.
Do not apply excessive pressure when drilling. This will
not increase drilling performance.
Only pure water, without additives, may be used for cool-
ing and flushing when drilling. Use of the liquids listed
in the DD-REC1 operating instructions is permissible
2 2.5 mm 2 14 AWG 12 AWG
40 m 100 ft 150 ft
5