WARNING
Ensure the correct rotary direction if the motor to avoid damage the pump and vacuum
system.
1. Observe the cooling fan from the fan cover of the motor.
2. Turn on the motor for several minutes then turn it off.
3. Check whether the cooling fan of the motor rotates in the direction shown by the arrow
on the motor mounting plate. If the direction is not correct,
Cut off the power
Remove cap of terminal box and exchange any two of L1, L2, L3. Then back the cap.
Turn on the pump and check the rotary direction of fan.
4.6
The connection between air inlet of the pump and user’s system
Use VG80 standard pipe joint to connect the pump with user
’s system. Pay attention to
following points
In order to achieve the best pumping speed, make sure that the pipe connecting with
air inlet should be as short as possible and less elbow exist. The internal diameter
should be smaller than that of air inlet.
Hold the vacuum pipes steadily in case of too much stress on the joints
If it
’s necessary, use soft bellows to reduce the vibration and stress on joints. The
withstanding pressure of soft bellows should be higher than the maximum pressure
produced by the vacuum system. If the pump is installed on the shock absorber, the
soft bellows must be used.
Use proper valves to separate the pump from user
’s system if vacuum status is
needed with the pump off.
Equip with the filter on air inlet of the pump if the pump is used for the exhausting and
inhaling of condensing steam or placed in dusty occasion.
Ensure that the surface of seals are clean and free of scratch.
4.7 The
connection between gas outlet and user’s system
