VACUUBRAND MZ 8C - Manual (Page 31)

page 31 of 52
eration. This may reduce or block the fans’ air supply.
Check fan regularly for dust/dirt. Clean fan guard grill if
necessary to avoid a reduction of ventilation.
A warm up period (approximately 15 min.) is required to
ensure that the rated ultimate vacuum and pumping speed
are attained.
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.
➨
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.
For condensable vapors (water vapor, sol-
vents, etc.):
- ME 16C / MZ 8C / MD 8C: The gas ballast
valve is open if the arrow on the gas ballast
cap is pointing towards the side of the pump
with the rating plate.
MD 12C / MV 10C: The gas ballast valve is
open if the arrow on the gas ballast cap is
pointing away from the pump‘s inlet.
NOTICE