Notice – VACUUBRAND RZ 9 User Manual
Page 14
inlet or outlet.
• Pumping at high inlet pressure may lead to overpres-
sure at the gas ballast valve. Pumped gases or con-
densate might be expelled if the valve is open. If an in-
ert gas supply is connected to the gas ballast, ensure
that its inlet pipeline is not contaminated.
• Check oil level of the rotary vane pump (through sight
glass) every time before starting the pump.
• Pay attention to the safety symbol ”hot surfaces” on
the equipment.
During operation the surface temperature of the pumps
may exceed 176°F (80°C). Make sure not to touch the
pumps accidentally.
Hot parts may cause burns if touched. Adopt suitable
measures to prevent any danger arising from hot sur-
faces or electric sparks. Ensure that hot surfaces of
the pump do not cause burns. Provide a suitable con-
tact guard if necessary.
• A power failure may cause accidental ventilation of the
pump or the vacuum system, if the manual gas ballast
valve (RE 2.5 / RZ 2.5 / RE 6 / RZ 6 / RE 9 / RZ 9) is
open. If this constitutes a potential source of danger,
take appropriate safety measures, e.g., install a sole-
noid operated gas ballast valve.
Prevent the backpressure of gases and the backflow of
condensates at the outlet.
Provide appropriate protective measures to allow for the
possibility of failure and
malfunction. The protective mea-
sures must also allow for the requirements of the respec-
tive application.
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.
NOTICE