Start-Up And Vacuum Limiting Valve; Vacuum Level; Adjusting The Vacuum Level; Pump Service - Nederman RBU Serie Manual De Usuario

• Replace permanent bearings before 15000 hours of
operation.
• Re-grease the bearings at least every 2000 hours of
operation.
8.10 Start-up and vacuum limiting valve
Figure 1 item 14 shows the vacuum limiting rub-
ber-coated valve disc. Only replace the valve disc
if damaged. The circular 'ridge' must face the com-
pressed air cylinder.
Perform the following start-up and vacuum limiting
valve inspection every 500 hours of operation:
1 Start the unit.
2 Place your hand on the motor cooling air outlet,
Figure 3 item 16.
3 The valve works correctly when:
• Air is sucked into the motor cooling air outlet
during Y mode.
• Hot air is blown out from the motor cooling air
outlet during D mode.
8.11 Vacuum level
WARNING! Risk of hearing impairment
Use a hearing protector when verifying the
vacuum level. The sound level is very high
when the unit is run with the enclosure roof re-
moved.
Perform the following vacuum level inspection every
500 hours of operation:
1 Close all valves at work sites.
2 Start the unit.
3 Verify the level on the vacuum meter corres-
ponds with the working vacuum specified in
tion 3.1 Technical data.
4 Adjust the vacuum level if necessary, see
tion 8.11.1 Adjusting the vacuum
8.11.1 Adjusting the vacuum level
Do the following to adjust the vacuum level:
1 Remove the roof. Keep all enclosure panels in
place.
RBU
2 Release the regulator knob from the locked posi-
tion, see
• Turn the knob anti-clockwise to decrease the
• Turn the knob clockwise to increase the vacuum.
3 Push down the regulator knob to the locked posi-
tion.
4 Refit the roof.
8.12 Pump service
The 3-lobe roots pump must be dismantled for re-
placement of bearings and gear wheels after 30000
hours of operation. This service must be carried out by
qualified personnel. Contact your local Nederman rep-
resentative for more information.
9 Spare Parts
Contact your nearest authorized distributor or
Nederman for advice on technical service or
if you require help with spare parts. See also
www.nederman.com.
9.1 Ordering spare parts
When ordering spare parts always state the following:
• The part number and control number (see the
product identification plate).
• Detail number and name of the spare part (see
www.nederman.com/en/service/spare-part-
search).
• Quantity of the parts required.
Sec-
10 Recycling
Sec-
The product has been designed for component mater-
level.
ials to be recycled. Different material types must be
handled according to relevant local regulations. Con-
tact the distributor or Nederman if uncertainties arise
when scrapping the product at the end of its service
life.
Figure 1 item 15.
vacuum.
CAUTION! Risk of equipment damage
Use only Nederman original spare parts and ac-
cessories.
EN
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