Blastrac 2-20DT, Operating Instructions Manual

Page: 17 / 32

17
5. Operation
During operating the machine, the following additional safety instructions must be followed closely.
Before switching on the machine make sure that no-one can be endangered when the machine starts up.
Make sure that no vehicles, such as forklift trucks and other equipment run over the electric cable and the dust
hose.
5.1 Before switch on

Check if the distance from magnet to the floor is 8 – 10 mm. Check this height with aluminium strips.

Check the distance from brush sealing to the floor. This may be max. 1 mm.

Fill the separator equally with the selected abrasive up to the bottom of the separator tray. The
abrasive valve must be closed whilst doing this.

Connect the blast machine and dust collector with the dust hose. This connection must be reliable.

Connect the power supply cable of the dust collector with the main power supply / generator. Be sure
that the electrical power supply is correct.
5.2 Checking the turning direction of the motor(s)
 Start the mach ine for a few seconds by pressing the green ‘Blastmotor ON’ button.
 Stop the machine by pressing the red ‘Blastmotor OFF’ button.
 Check the rotating direction of the Blastmotor (indicated with an arrow).
Correcting the turning direction of the motor(s)
 Switch off all motors and put the main power switch to the OFF-position
 Wait for a complete standstill of all drives.
 Take the plug out of the power source.
 Change the phases.
 Check the turning direction of the motor again.
5.3 Switching the machine on

Before switching on the blast machine, switch the dust collector on. The dustcollector is needed to
vacuum off all the created dust and helps to cool the blast machine.
 Press the green push button “Blastwheel ON” and check the rotating direction of the blastmotor. The
correct direction is given with an arrow on the housing of the motor.
If the blastmotor turns the wrong way, correct this immediately.
 Select the speed using the speed control knob on the steering handle.
 When the machine is traveling pull the abrasive control lever towards you to open the magnetic valves.
Observe the ammeters. They may indicate the full load amperage. After having blasted aprox. 2 m,
close the abrasive valves, stop the machine and check the blasted surface.
 If the ‘hot spots ’ is too much on the right, turn the cage a little bit clockwise.
Never adjust the cages during blasting!
When blast cleaning concrete the abrasive magnetic valves may only be opened
when the blast cleaning machine is travelling! If the machine is at a standstill and the
valves are open deep holes may be blasted into the concrete surface within seconds.
All persons in the proximity of the machine must wear safety glasses with lateral
protection as well as safety shoes and ear protection. The operator is obliged to wear
close-fitting protective clothing and a dust mask.