Hilti DD-REC 1 Mode D'emploi page 19

Carefully remove dirt from the surfaces of the seals.
Ensure that the main filter is seated securely. Check
that the air release valve moves easily
– Place the cover on the container. Take care to ensure
that it is positioned correctly, the right way round (the
lugs at both corners of the cover located in the cor-
responding recesses in the container
nipple block is then positioned at the same side as
the container water level sight glass. When the cov-
er is placed in position, take care to ensure that the
container latches and the float hose are not pinched
between the container and the cover. Care must also
be taken to ensure that the suction hose hangs down
into the water and that the float ball is free to float
– Close the container latches. To do this, first engage
the latches on the container and then press the latch-
es towards the cover. The container latches must be
heard to engage. It may be necessary to press the
cover down slightly.
– Always use all four container latches. Never use
the unit when the container latches are dam-
aged.
– Lift the container by its handle and insert it carefully,
the right way round, in the housing. When doing so,
the guide ribs on the container must be carefully insert-
ed into the corresponding openings in the housing. Do
not allow the container to drop into the housing
– Fold the container handle down to the nipples side
until it is flush with the top surface of the housing. It
may be necessary to press the cover down slightly.
– Never attempt to fill the unit through the hoses. It
must always be filled as described above.
Operation
– Check the sight glass
is in the container.
– Connect the unit to the mains supply. Use the supply
cord with the built-in PRCD residual current device
(supplied with the diamond core drilling machine).
Insert the keyed plug in the socket as described above.
Insert the mains plug in the mains socket.
– Switch on the residual current device by pressing the
green button. The self-test function of the unit is then
activated. All warning lamps light briefly and an acoustic
signal is emitted.
– Test the residual current device for correct func-
tionality. To do this, press the black test button.
The ON indicator on the unit must extinguish. After
testing, switch on again by pressing the green button.
– Switch on the unit by turning the ON / OFF switch in
a clockwise direction as far as it will go. It then takes
about 20 seconds for the internal parts of the system
to fill with water. During this time, the water supply
system is not fully operational. Subsequently, the
green ON indicator lights to show that the unit is ready
for use.
– Start the water supply system by operating the switch
on the DD EC-1 diamond core drilling machine. Adjust
the water volume as desired by turning the regulator
on the diamond core drilling machine and begin drilling
Printed: 06.11.2015 | Doc-Nr: PUB / 5139941 / 000 / 01
.
and ). The
to ensure that sufficient water
(please refer to the operating instructions for the DD
EC-1 diamond core drilling machine).
– Automatic filter flushing begins (takes about 15 to 20
seconds) when the switch on the DD EC-1 diamond
core drilling machine is not operated for several sec-
onds. The unit supplies no water during this time.
– After completion of the filter flushing procedure, the
unit is again ready for use and the next drilling oper-
ation can be started (ready mode).
– Stand-by mode: If the switch on the diamond core
drilling machine is not pressed for a period of more
than 15 minutes, the unit automatically releases pres-
sure and enters stand-by mode. In this case, before
. beginning the next drilling operation, the switch on
the diamond core drilling machine must be pressed
briefly in order to re-pressurise the unit. After a few
seconds, the unit is again ready to supply water.
Warning indicators
– Acoustic warning signal (without warning lamp): This
indicates inadequate water flow which could be caused
by incorrect adjustment of the regulator valve in man-
ual operation or other malfunctions (please refer to
the "Troubleshooting" section).
– Water warning lamp
ing signal): This indicates inadequate water pressure.
.
Could be caused by the container being empty, blocked
filter or other malfunctions (see "Troubleshooting" sec-
tion).
– Temperature warning lamp
warning signal): This indicates excessively high water
temperature. Stop using the system immediately (see
"Troubleshooting" section).
– Water level / slurry volume sight glass
cates the drilling slurry level and the remaining quan-
tity of water in the container. It provides useful fault-
finding information in case of malfunctions and makes
it possible to estimate the number of holes which can
be drilled before emptying and refilling. Due to wide-
ly varying conditions (diameter, depth, etc.), it is not
possible to give an exact indication of the number of
holes which can be drilled.
Cleaning the container
The container should be emptied and cleaned in the fol-
lowing cases (it is generally recommended that the main
filter is cleaned at the same time):
– Malfunctions caused by the slurry level being too high
or the water level being too low (see "Troubleshoot-
ing" section).
– Unit is switched off permanently (e.g. at the end of
the working day).
– Remove the container from the housing and open
it as described above. Observe the safety precau-
tions.
– Dispose of the container contents in accordance with
the information in the "Disposal" section and under
observance of local regulations.
– Rinse out the remaining slurry and, if necessary,
(simultaneous acoustic warn-
(simultaneous acoustic
: This indi-
15