VACUUBRAND ME 4R - Manual (Page 10)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999122 / 02/09/2009
page 10 of 21
During operation:
Do not start pump if pressure difference between inlet and outlet port exceeds
max. 1 bar. Attempts to start pump at higher difference pressure may cause blockade
and damage of the motor.
☞ Obey maximally permitted pressure at the outlet.
☞ For continuous operation at inlet pressures above atmospheric pressure the inlet
pressure must not exceed the outlet pressure. The maximally permitted pressure
at the oulet is 4 mbar absolute.
Use the vacuum adjustment device at the inlet port of the pump to control the vacuum
in the system. By turning the dispensing screw the amount of gases pumped from the
vacuum system can be controlled:
➨ Turning the dispensing screw to the left: vacuum is decreased (higher pressure)
(Pump additionally takes in bleed air via dispensing screw.)
➨ Turning the dispensing screw to the right: vacuum is increased (lower pressure)
The overpressure at the outlet port of the pump is controlled accordingly via the
pressure adjustment device:
➨ Turning the dispensing screw to the left: pressure is decreased (Pump blows off via
dispensing screw.)
➨ Turning the dispensing screw to the right: pressure is increased (attention: max. 4
bar permitted!)
☞ If the pump is used as vacuum pump, ensure that the exhaust pipeline cannot
become blocked.
☞ Attention: Do not unscrew the dispensing screw completely! There are no stops at
the end of the threads!
A warm up period (approx. 15 min.) is required before the rated ultimate total pres-
sure and pumping speed are attained.
☞ Prevent internal condensation, transfer of liquids or dust. The diaphragm and valves
will be damaged, if liquids are pumped in significant amounts.
Pierce hole
after installation
C: Manometer with bore at the rear side
Pierce the hole at the rear side of the manometer. Some out-
flow of liquid is normal.
☞ Do not tilt pump during transport.
hole
B: Manometer with pin
Ventilate the manometer by lifting the pin. Do not remove the
pin completely!
☞ Repeat if necessary until dial doesn’t show a pressure dif-
ference with measuring connection ventilated to atmosphere.
pin
D: Manometer without bore, pin or pressure compensa-
tion valve
Do not ventilate the reference chamber of this manometer!