BUSCH R5 RE 0016 B, Installation And Operating Instructions Manual

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Long suction, discharge or pressure line with
too small diameter Use larger diameter
The valve disk of the inlet non-return valve is
stuck in closed or partially open position Disassemble the inlet, clean the screen and the
valve as required and reassemble
The oil tubing is defective or leaking
The oil return line is broken
Repair the oil tubing (Busch service)
A shaft seal is leaking Replace the shaft seal ring (Busch service)
An/The exhaust valve is not properly seated
or stuck in partially open position Disassemble and reassemble the exhaust
valve(s) (Busch service)
A vane (i) is blocked in the rotor or otherwise
damaged Free the vanes (i) or replace with new ones
(Busch service)
The radial clearance between the rotor and
the cylinder is no longer adequate Readjust the vacuum pump (Busch service)
Internal parts are worn or damaged Repair the vacuum pump (Busch service)
Version with oil return line to the suction connection:
The oil return line starts in an area vented to atmospheric pressure. Particularly on small model
pumps, a fairly large amount of air is sucked through the oil return line, which may prevent the
ultimate pressure from reaching 20 bar abs.
In order to exclude this possible cause:
squirt oil through the gas discharge (l)
The gas conveyed by the vacuum pump smells
displeasing Process components evaporating under vac-
uum
Readily volatile and thus gaseous components
of the oil, e.g. additives, particularly right after
an oil change.
Note : This is no indication of a malfunction of
the oil separator. The oil separator is able to
retain droplets of oil, however no gaseous
components of it.
Check the process, if applicable
Use a different type of oil, if applicable
There is a growing oil film on and/or around
the safety valve (a light oil film on the safety
valve is normal) Excessive pressure in the oil separator, possible
causes:
the exhaust filter is partially clogged,
throttling of the discharge line,
the flame arrestor (k) on the discharge side is
partially clogged
Replace the exhaust filter
(
Ú
page 9: Maintenance)
Check the discharge line for throttling
Warning : Risk of explosion in case of faulty
assembly! Flame arrestors must only be ser-
viced by personnel that have received specific
training for this purpose either by Busch or by
the manufacturer of the flame arrestors.
Clean the flame arrestor (k) on the pres-
sure/discharge side
The vacuum pump does not start The drive motor is not supplied with the cor-
rect voltage or is overloaded Supply the drive motor with the correct volt-
age
The drive motor starter overload protection is
too small or trip level is too low Compare the trip level of the drive motor
starter overload protection with the data on
the nameplate, correct if necessary
One of the fuses has blown Check the fuses
Version with alternating current motor:
The drive motor capacitor is defective
Repair the drive (Busch service)
The connection cable is too small or too long
causing a voltage drop at the vacuum pump Use sufficiently dimensioned cable
Troubleshooting
RE 0016 B / RE 0040 B / RE 0063 B with safety valve, without motor
0870142823
page 15