Adjustable pressure switching val‐
ue
The minimum flow of the Bartec control device, type 07-3711-2213/1002, is
preset for motors of frame size 100 ... 180. With this initialization, a drive sys‐
tem can be operated.
The purging time must be set according to the dimension of the total system
(purge hose length and number of motors within the purging cycle) on site.
For calculation see fig. 10-1 "Determine total purge volume" on page 54.
Risk of explosion due to incorrect adjusted
pressure switching values on the control de‐
vice!
The initialization of the BARTEC controller cannot be accepted for the motors
with frame size 225. Are motors used with frame size 225 or controllers from
other manufacturers, determine the appropriate pressure switching values for
motor purging and set them manually.
Heed the details in tab. 10-3 "Preset pressure switching value (Bartec)" on
page 55, "Purge volume motor and tube" on page 53 and fig. 6-2 " Ex-iden‐
tification plate on Ex-type motors" on page 26 to adjust the pressure switch‐
ing values. In general, the locally test of the pressure switching values and
before startup must be ensured by the user of the total system.
Designation
Pressure
switching value
DIFF A / DIFF B (traverse value on the pressure monitoring mod‐
ule)
2.0 mbar
MIN A / MIN B (minimum housing inner pressure, deactivation val‐
ue)
1.0 mbar
MIN P (arbitrary prewarning) 2.0 mbar
DP 1 (minimum or nominal operating pressure) 2.5 mbar
MAX (maximum housing inner pressure) 23.0 mbar
MAX 1 (maximum scavenging pressure) 20.0 mbar
Tab. 10-3: Preset pressure switching value (Bartec)
10.3 Preparation
1. Have the documentations of all products used ready at hand.
2. Check the products for damage.
3. Check all mechanical and electrical connections (incl. the potential
equalization line).
4. Activate the safety devices and monitoring systems of the installation.
5. Get a commissioning log ready.
10.4 Procedure
Once all requirements are met, proceed as follows:
1. Activate the fan for the MAD motor or the external cooling system to
cool the MAF motor.
2. Check the given values on the designation plate on the motor, like scav‐
enging gas volumen, scavenging gas, purging time, etc. (see fig. 6-2 "
Ex-identification plate on Ex-type motors" on page 26). The values must
DOK-MOTOR*-IDYN*A*EXPD-IB05-EN-P Bosch Rexroth AG 55/69
Rexroth MAD and MAF Motors in EX px d Design acc. to ATEX Directive 2014/34/EU
Commissioning
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