Elmo Rietschle S-VSI 300(44) - Manual (Page 23)

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Commissioning and decommissioning
6.1.1 Checking the rotation direction
The drive shaft direction of rotation is shown
by the rotation direction arrow (Fig. 2/O) on the
motor flange.
a) Start the motor briefly (max. two seconds) to
check the direction of rotation. When looking at
the motor fan, it must rotate clockwise.
NOTICE
Incorrect direction of rotation
Operating in the wrong direction of rotation leads
to damage to the pump.
6.1.2 Post-run
If operating for less than 2 hours, in order to remove
condensation from the pump, let the vacuum
pump run at 28"Hg with dry air for a minimum of
10 minutes.
CAUTION
Condensate formation and impurities
After pump shutdown, condensation may form
inside the pump and deposit impurities on the
claw rotors and cylinder surfaces which may
prevent a pump start-up in the future. It is best to
preform a post-run as described above.
Depending on the application, a post-run with a
specific type of purge gas may be required. Contact
Engineering for further advice.