Nederman RBU 1300, User Manual

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RBU
and the unit started once the cause for overheating
has been found.
7.8 Inlet safety grating
The safety grating in the inlet silencer may clog if the
dust collection is poor, or the vacuum unit is located in
a very dusty area. Perform the following inlet safety
grating inspection every 500 hours of operation:
1
Turn off the unit.
2 Remove the roof from the unit.
3 Inspect the safety grating for clog, see Figure 1
item 17.
4 Refit the roof.
7.9 Motor bearings
The recommended intervals for replacing lifetime
greased bearings or re-greasing the grease nipple can
be found on the motor data label or motor manual.
The operating time before service depends on size,
environmental and operating conditions. As the fol-
lowing values are guidelines at normal operation:
• Replace permanent bearings before 15000 hours of
operation.
• Re-grease the bearings at least every 2000 hours of
operation.
7.10 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.
7.11 Vacuum level
WARNING! Risk of personal injury
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
Sec-
tion 3.6 Technical data .
4 Adjust the vacuum level if necessary, see Sec-
tion 7.11.1 Adjusting the vacuum level .
7.11.1 Adjusting the vacuum level
Do the following to adjust the vacuum level:
1
Remove the roof. Keep all enclosure panels in
place.
2 Release the regulator knob from the locked posi-
tion, see
Figure 1 item 15.
• Turn the knob anti-clockwise to decrease the
vacuum.
• Turn the knob clockwise to increase the vacuum.
3 Push down the regulator knob to the locked posi-
tion.
4 Refit the roof.
7.12 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.
8 Spare Parts
CAUTION! Risk of equipment damage
Use only N
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original spare parts and ac-
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Contact your nearest authorized distributor or
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for advice on technical service or
if you require help with spare parts. See also
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8.1 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
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• Quantity of the parts required.
9 Recycling
The product has been designed for component mater-
ials to be recycled. Different material types must be
handled according to relevant local regulations. Con-
tact the distributor or
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if uncertainties arise
when scrapping the product at the end of its service
life.
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