Notice – VACUUBRAND RZ 9 User Manual
Page 29
propriate equipment such as cold trap, separator, oil
separator, full flow oil filter, shut-off valve (see “Acces-
sories”, pg. 36) as well as special oil.
The
ambient temperature should be at least 54°F (12
°C). Otherwise the pump may not start because of the
high oil viscosity at low temperature.
Pumping down can be started at any pressure at the inlet
below atmospheric pressure.
Do not start the pump, if the
pressure at the outlet port
exceeds 16.0 psi (1.1 bar) absolute.
Continuous operation is possible at any pressure below
atmospheric pressure. For pumps RE/RZ 16 with oil mist
separator, continuous operation is only possible below 75
Torr (100 mbar).
Oil consumption will increase at inlet pressures above 75
Torr (100 mbar). Check oil level more frequently.
Prevent internal condensation, transfer of liquids or dust.
The pump unit will be damaged if liquids are pumped in
significant amounts. Check the pump regularly for exter-
Check the pump regularly for exter-
Check the pump regularly for exter-
nal soiling and deposits. Clean the pump if necessary to
avoid an increase of the pump’s operating temperature.
Single-phase motors are protected by a self-hold ther-
mal cutout in the winding.
Three-phase motors are protected by a circuit-breaker
isolating all poles in case of overload.
Note: Only a manual reset is possible. Switch off the
pump and disconnect the electrical power cord. Identify
and eliminate the cause of failure. Wait approximately five
minutes before restarting the pump.
Avoid high heat supply (e.g., due to hot process gases).
See “Technical data”, pg. 17, for maximum permitted
gas and ambient temperatures.
A warm up period (approximately 30 min.) is required to
ensure that the rated ultimate vacuum and pumping speed
NOTICE