19
Connections, operation and maintenance
3-phase 400 V mains supply (380 V, 415 V) or 3-phase
230 V, with appropriate fuse rating: The switch elec-
tronics set the correct direction of rotation automati-
cally. Standard plug as per EN CEE 63.
The unit employs a star/delta type switch (Y-
∅
).
Starting up takes only a few seconds (max. 5 sec.).
Use an extension cable of adequate cross-sectional
area. The unit will not start if the voltage supplied is too
low or if one of the phases is too weak.
The water supply is always connected to the lower
coupling on the hydraulic unit. Water pressure should
be 4–6 bar, with a flow rate of 10 l/min. (minimum of
5 l/min. if temperature is below 20°C ). We recommend
that the jobsite water supply connection is equipped
with a non-return valve, in accordance with national
regulations.
The oil level is visible at the indicator glass or the plas-
tic tube, which also serves as a vent.
Keep the hydraulic couplings clean. When connecting
the hoses, turn the securing ring after the coupling
engages with an audible “click”.
The DS-CB 3 / CB 4 remote control unit is used to
switch on.
The water supply to the saw head is incorporated in
the FH14 hose set.
Disconnect the water supply hose after finishing work.
The hydraulic unit (oil cooler) then drains automatically.
230 V socket (max. 10 amps) for connecting a light
rotary hammer drill or electric light etc.
9.1Instructions for maintenance of the hydraulic units.
– Check the oil level
at weekly intervals and, if necessary, top up with hydraulic oil
, type HLP 46 (Hilti item no.
221201/7).
–
Change the oil and filter
every 12 months and apply the Hilti maintenance sticker
. The D-LP 30 (LP 20) has
an oil capacity of 35 litres.
– If the hydraulic unit’s power output drops or if the unit fails completely, it can be checked on the spot by a Hilti specialist.
–
Note:
If the voltage of one of the three phases is too low, the hydraulic unit will NOT start! Always check the mains
supply first! The fuses should also be checked if the unit does not start. They are located under the cover. Please
refer to section 13, fault finding.
– The hydraulic unit will not start as long as the
emergency OFF switch
is in the pressed-in position.
– If the D-LP 30 does not start or shuts down again immediately, the reason may be that the oil level is too low (top
up) or the unit has overheated due to inadequate cooling.
–
Operation in winter or at low temperatures:
The hydraulic unit should be allowed to run for a few minutes until
warm (with water running) before a load is applied.
– Do not allow the hydraulic unit to run without cooling water. Always keep the water running when operating at tem-
peratures below zero! Disconnect the water supply hose from the unit when the work is finished - the unit then
drains automatically.
Use only water supply couplings of the free-flow type (without automatic valve)
for the
water supply to the hydraulic unit!
– Maintain adequate pressure in the tyres of the wheels used for transport (max. 3.5 bar)
.
– If an electric generator is used to power the D-LP 30 (LP 20) hydraulic unit, it must provide an output of at least 40
kVA and must be earthed/grounded. A generator with a power output of approx. 60 kVA is of advantage.
Technical data:
D-LP30
D-LP20
Nominal power output:
30 kW
20 kW
Fuse rating, min.:
32 A
32 A
Fuse rating, max.:
63 A
63 A
Electric supply:
3
×
400 V/50 Hz
3
×
230 V/50 Hz
Max. operating pressure:
210 bar
210 bar
Oil flow rate:
30–100 l/min.
30–87 l/min.
Weight:
approx. 210 kg
approx. 210 kg
Electric remote control:
10 m
10 m
With extension:
20 m
20 m
Protection class:
IP44
IP44
Saw head:
DS-TS 30–54
DS-TS 30–45
Other equipment
DD-750HY, DS-WSS30,
powered:
DS-PS30, DS-TS22/C
