Technical Information
Description of the TwisTorr 304 FS
TwisTorr 304 FS User Manual / 87-901-027-01 247/304
During normal operation, the motor is fed with a voltage of 54 Vac
three-phase at 1010 Hz. To reduce losses during start-up to a
minimum, the frequency increases according to a ramp with a higher
initial voltage/frequency ratio.
WARNING!
The pump must always be cooled before starting using it. Running the pump
without cooling it could damage inside components.
The pump can be water cooled or air cooled: in the first case the
customer can use the dedicated channels on the pump body, in the
second case an external optional fan is available (model X3500-
68011). A thermistor sensor is mounted near the upper bearing to
prevent the pump from overheating.
If the thermistor reading exceeds 60 °C the pump fails and stops with
Error Code = 2. If the thermistor reading is below 0 °C, the pump
fails and stops with Error Code = 1 (see Controller Manual),
The pump can operate in any position and can be supported on the
high vacuum flange. The connection of the forevacuum on the side of
the pump is a KF 16 NW flange (KF25 – optional).
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