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and eliminate the cause of failure. Wait approximately five
minutes before restarting the pump.
•
Note
: In case of
supply voltage below 100V
, the lock
of the breaker may not latch and the pump might re-
start on its own after sufficient cooling. Take appropri
-
ate precautions, if an automatic restart of the pump
may lead to a dangerous situation.
A warm up period (approximately 15 min.) is required to
ensure that the rated ultimate vacuum and pumping speed
are attained. Avoid overheating (e.g., due to hot process
gases).
Important notes regarding the use of gas bal-
last
Gas ballast is a continuous purge to keep the pump’s in-
terior as clean as possible and to reduce the possibility of
condensation inside the pump.
➨
Oxygen enters the pump if using air as gas ballast.
➨
Air and pumped media might react inside the pump or
at the outlet of the pump and form hazardous or explo-
sive mixtures, when you use air rather than inert gas
for the gas ballast. This constitutes a risk of significant
damage to equipment and/or facilities, a risk of per-
sonal injury or even loss of life.
+
Make sure that air/gas intake through the gas ballast
valve can never lead to hazardous, explosive or other-
wise dangerous mixtures. If in doubt, use inert gas.
To reduce condensation in the pump, do not pump vapor
before the pump has reached its operating temperature.
Open the gas ballast valve when pumping condensable
vapors. Turn gas ballast cap to open valve.
NOTICE
NOTICE
