5. Start the pump system using the appropriate control source, that is,5.
using the Start button in manual control mode refer to
; the Start/Stop control input in parallel
control mode or a Start command in serial control mode.
6. Open the vacuum system isolation valve (if installed).6.
Use the following procedure to start the 3-phase pump:
1. Make sure that the vacuum system isolation valve is closed (if installed).1.
2. With the mains electrical supply isolated, make the electrical connection2.
from the mains electrical supply outlet to the pump.
3. Check that the exhaust-extraction system is not restricted, and that any3.
valves in the exhaust-extraction system are open.
4. Apply power.4.
5. As the pump is direct-on-line, the pump will start as soon as power is5.
applied.
6. Open the vacuum system isolation valve (if installed).6.
7.7To achieve ultimate vacuum
In or
der to achieve the best possible vacuum, the pump should be operated
with the gas ballast control turned off. However, if the pump, or elements
of the vacuum system it is attached to, are new or have been newly tted,
some atmospheric moisture may be present. If atmospheric moisture is
present, run the pump with gas ballast on for 20 minutes before turning gas
ballast off. If moisture is allowed to remain, the performance of the pump will
be impaired.
7.8To pump condensable vapours
Select gas ballast ON when there is a high proportion of condensable
vapours in the process gases. This will assist the vapours to pass through
the pump without condensing and keep the pump performance from
degrading.
7.9Shut down
CAUTION: PUMP DAMAGE
Risk of damage to the pump. If the gas-ballast control is open and the motor
is switched off for any reason, the pump drive shaft may rotate in the reverse
direction, causing a system pressure rise. To prevent this, use a gas-ballast control
valve.
CAUTION: ELECTRIC SHOCK
Risk of electric shock. Do not disconnect the pump from the electrical supply until
the pump has stopped completely.
Note:
42 300668736_002_C7 - © Leybold
Operation
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