Electrical Connection - Weka SR25 Manual De Instrucciones

4. P R E P A R A T I O N
Convince yourself that the machine has not been damaged in transit. Check that the nominal voltage is
the same as the voltage indicated on the rating plate.
4.1

Electrical connection

Operate the SR25/38/65/68/75 only via a properly earthed socked. If required use only high-grade
extension cords with a sufficient cross-section:
SR25/38: up to 75m length
SR65/68/75: up to 75m length
When properly used, water doesn't enter the machine, so that the operation directly on the electrical
mains is possible. As, when the machine is demaged,the water protection is no longer guaranteed, we
recommend to use a RCD for saving the operator.
Take care that the extension cord is not rolled up on use for reaching a sufficient heat
removal. Consider that the SR25/38 takes the maximal power from the electrical mains.
Therefore do not connect other users to the concerning fuse, as the mains and the fuse
will then be overloaded. Please take care that the SR65/68/75 is only connected to an
earthed 16A CEE socket. If you operate the machine at a higher assured socket, you risk
in case of any fault the total burning of the electronic. By the high leakage current the
machine can electrify when touched, if the ground line is not connected correctly. In this
case absolutely disconnect the mains plug immediately and check the ground wire.
The above mentioned machines can be used at a generator or a transformator provided by the
construction site, if following conditions are kept:
- operating voltage within +5% and –10 % to nominal voltage
- integrated automatic voltage controller with start amplification
- frequency 50 – 60Hz; max. 65 Hz
- AC voltage, power output at least:
SR25/38
SR65/68/75
Do not use any other devices at the generator/transformator at the same time. The switching on and off
of other devices can cause undervoltage and / or over voltage peaks that can damage the machine.
4.2 Water connection
Connect the water to the water supply via the plug-in nipple.
Attention: max. water pressure 3 bar.
Please use a GARDENA coupling as the connecting piece to the machine. This can be obtained from
a garden center or builders' merchant.
A water coupling of brass of high value can be received directly from WEKA.
Use only clean water, as dirty water will considerably disturb the heat exchange on the cooling surface
and thereby the motor can be totally damaged. Else the seals wear out very quickly.
When water issues from the leakage hole on the water supply bush or at the back end of the
motor, the seals are to be changed at once. This is only to be done in an authorized repair center.
Attention: Under full power conditions at least 1l water per minute is required.
Open the water coupling after the operation, so that the cooling split can empty. This is
especially in cold seasons very important because of danger of frost.
4.3 Fitting up in the core drill rig
The SR25/38/68 is fastened at the gear foot (see illustration) with 4 M8 screws (SR65: 6 screws M8,
SR75: 8 screws M8) with the core drill rig (2) or through an adapter disc which is delivered by
manufacturer of the drill rig.
Choose these screws with a length of thread engagement of at least 20 mm and tighten them
with a torque of 20 Nm.
Place the machine only in a stable core drill rig which has precise guides which are free from clearance.
Ensure that the machine axis is absolutely parallel to the rig column.
Only use rigs with sufficient stability.
Only tear the drill bit without any obstacles from the bore hole, i.e. do not try to pull out a jammed drill bit, as
high angular forces on the drill spindle can break the bearing case. Take care, especially on horizontal
drilling, that the core is not pulled out with the core bit, as its high weight can also break the bearing case.
Since the rig is not included in the delivery, only a few important features are noted here.
Please pay attention to the operating instructions for the rig.
- 3G2,5 quality e.g. H 07BQ-F or H 07RN-F
- 4G2,5 quality e.g. H 07BQ-F or H 07RN-F
- 4 kVA
- 13 kVA
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