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3. START-UP PROCEDURES - CHECK LIST
In all cases motors are designed for operating voltages plus or minus 10 % of the normal rating
(See motor nameplate specifications)
1. Check to be certain that the voltage that is going to be used matches the specification in the
decal at the end of the cable. Check the ON-OFF switch to be sure it is in the OFF position (O)
before you plug the pump to the outlet. Check to be certain the gas ballast valve is closed.
2. The pump is shipped without oil in the reservoir, which is delivered separately.
Before starting the pump it must be filled with oil. Remove the oil fill cap and add oil untill it is
visible in the middle of the sight glass, and replace the oil fill cap. After opening the isolation valve
and removing one of the connection caps proceed to switch ON ( I ) the pump. As soon as the
noise changes, close the isolation valve and let the pump run for one minute. Once the pump is
switched OFF ( O ) check the sigh glass for proper oil level, if necessary add oil.
A high oil level is not recommended, the oil can be carried out together with the air that is being
evacuated from the system, producing an oil fog at the exhaust. On the other hand, a low oil level
will produce poor vacuum.
WARNING:
Before connecting your pump to the system, be sure to eliminate the remaining gas inside the
pump in an acceptable way. Do not begin the evacuation of a system which is still under pressure,
it may cause damage to the pump.
4. USE OF THE GAS BALLAST
When vacuum is being performed in the system, there is always moisture inside as vapor which
tends to condense into liquid and combine with the vacuum pump oil. This reduces the pump's
ability to reach the ultimate deep vacuum level for which it was designed.
The gas ballast purges a small quantity of atmospheric air through the exhaust chamber to
prevent vapor condensation inside the pump.
To operate the gas-ballast, while the pump is producing vacuum, unscrew it 1 turn, to let the air in
for 1 minute, then close it again to let the pump reach the final vacuum level.
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