VACUUBRAND HP 63B2 - Manual (Page 8)

page 8 of 20
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999069 / 24/09/2014
+ The residual leak rate of the equipment might render possible an exchange of
gas, albeit extremely slight, between the environment and the vacuum system.
Adopt suitable measures to prevent contamination of the pumped substances or
the environment.
• Ensure that no parts of your clothing, hair or fingers can be caught or drawn in at
the inlet of the pump. Never insert fingers or drop any other object into the inlet or
outlet.
• Pumping at high inlet pressure may lead to overpressure at the gas ballast valve.
Pumped gases or condensate might be expelled if the valve is open. If an inert
gas supply is connected to the gas ballast, ensure that its inlet pipeline is not
contaminated.
• Pay attention to the safety symbol ”hot surfaces” on the equipment. Hot parts
may cause burns if touched. Adopt suitable measures to prevent any danger
arising from hot surfaces or electric sparks. During normal operation the diffusion
pump becomes very hot, especially the vacuum connection. Do not touch, risk of
burning! Avoid contacting or covering the pump with burnable material, or mate-
rial which may be damaged due to high temperature, e.g., electrical power cord.
Ensure that hot surfaces of the pump do not cause burns. Provide a suitable
contact guard if necessary.
Attention: If the maximum permissible inlet pressure or the backing pressure at
the diffusion pump are exceeded, pump fluid might enter other parts of the vacuum
system.
Provide appropriate protective measures to allow for the possibility of failure and
malfunction. The protective measures must also allow for the requirements of the
respective application.
In case of overload, the motor of the rotary vane pump is shut down by a self-hold
thermal cutout in the winding.
Note: Only manual reset is possible. Switch off the pump and disconnect from the
power source. Identify and eliminate the cause of failure. Allow the pump to cool
down sufficiently before restart.
In case of excess temperature the motor of the diffusion pump is shut down by a
safety switch.
• Attention: After cooling down, the heating of the diffusion pump restarts auto-
matically. Adopt suitable measures if a restart is a potential source of danger.
Maintenance and repair
In order to comply with laws (occupational, health and safety regulations, safety at
work law and regulations for environmental protection) vacuum pumps, components
and measuring instruments can only be returned when certain procedures (see sec-
tion ”Notes and return to the factory”) are followed.
➨ Ensure that the pump cannot be operated accidentally. Never operate the pump
if covers or other parts of the pump are disassembled.
➨ Switch off the pump. Disconnect the electrical power cord and wait two minutes
before starting maintenance to allow the capacitors to discharge.
➨ Note: The pump may be contaminated with process chemicals, which have been
pumped during operation. Ensure that the pump is completely decontaminated
NOTICE