Pneumatic Connection; Operation - Bosch CRR 120 Instrucciones De Funcionamiento

en 14 | CRR 120 | CRR 120 equipment
5.3

Pneumatic connection

Fig. 6: Pneumatic connection
1 Compressed-air connection
Connect the compressed-air connection (Fig. 6, Pos. 1)
for the CRR 120 to a stable and dry compressed-air
supply.
The compressed-air supply must be filtered using fil-
ters (filter pore size 0.01 micrometer) Class F5 in ac-
cordance with ISO8573-1. Recommended filters from
Bosch Rexroth, Order number.: <0 821 303 433>.
Adjust the maintenance unit for the compressed-
air supply such that the compressed-air connection
(Fig. 6, Pos. 1) of the CRR 120 has an air pressure of
6.5 bar – 7 bar applied to it.
!
The system requires the offset-pressure to be deter-
mined (Chapter 7, Operation) and then added to the
set pressure. It is advisable to attach a sticky label
to the front of the device and to write the offset-
pressure on it.
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6.

Operation

Fig. 7: Operation
1 Valve for direction reversal: Return stroke (P0) / application (P1)
& measurement (P2)
2 Compressed-air outlet A <Application (P1) & measurement (P2)
3 Compressed-air connection B <Return stroke (P0)>
4 Regulator <Preselection of measuring pressure P2
5 Digital display for regulated pressure
6 Three-way switch for selecting pressure preselection P1/P2
7 Regulator <Preselection of application pressure P1
8 Main switch
9 Pressure gauge for inlet pressure
Switch on the voltage stabilizer and set to 24 V (DC),
then set the current regulator to "Maximum". Set the
compressed-air supply on the maintenance unit to
6.5 – 7 bar.
Press the main switch (Fig. 7, Pos. 8) on the CRR 120.
The operating pressure applied to the rear of the device
(Fig. 2, Pos. 1) <P0> is displayed by means of a pres-
sure gauge (Fig. 7, Pos. 9). The internal electronic cir-
cuit is switched on when the pressure level is sufficient
and the supply voltage applied. The CRR 120 is now
operational.
Robert Bosch GmbH