Hoefer VP200 - Manual (Page 12)

3. Important information
• Install the pump on a level and stable surface in an area
with adequate air circulation to allow heat generated by the
pump to dissipate.
• Ensure that the power supplied to the pump conforms to
the specifications on the pump rating plate.
• Plug the pump into a properly grounded outlet. If plugging
the pump into the gel dryer receptacle, the gel dryer must
be plugged into a properly grounded outlet.
The color code for the power cord wires is: green or green
yellow = earth/ground; blue or white = neutral; brown or
black = live. If wires are crossed, the pump motor direction
may be reversed and the system will become pressurized
and may burst.
• Remove both protective port covers before turning the
pump on!
• Always disconnect the power cord before servicing.
• If using the VP200 pump with instruments other than the
Hoefer GD2000 Gel Dryer, ensure that the vacuum pressure
rating is suitable for the application and that the pumped
gases are compatible with the materials listed on page 7.
• Only connect the gel dryer to the inlet port of the vacuum
pump; connecting it to the outlet port will cause the system
to become pressurized. (In general, ensure that the exhaust
line is never blocked to prevent the system from becoming
pressurized.)
• The pump body will become hot under normal pump
operation. Do not touch!
• The motor may overheat at altitudes above 1000 m
(3250 ft.), which causes the motor to automatically
switch off.
• Observe laboratory safety procedures to prevent the release
of hazardous fluids; while solvent recovery is very high with
this system, the pump should be operated under ventila-
tion conditions adequate for the substances being handled.
Although not necessary, installing a cold trap between the
dryer and the pump will minimize vapors released into the
work area.
• Prevent condensation inside the pump by clearing the pump
by running at atmospheric pressure for several minutes
before turning the pump off.
• Empty the catchpots when they are approximately half full
to prevent liquid from entering the pump head. Dispose of
solvents in accordance with local regulations.
• The catchpots are safety coated to prevent fragment
dispersion in case of breakage or implosion.
• Allow the unit to equilibrate to ambient temperature if
you bring it from a cold environment into a room prior
to operation.
•
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