－18－
5.2
Cautions for operation
Note
①
Do not run with opening a cover of the driver box. It causes electric shock
and the ignition.
②
If the pump evacuate a lot of moisture, replace the oil frequently. If the
pump is used with gas which contains a lot of moisture, water absorption
expands the vanes of the pump, the lubricity of the pump oil deteriorates
and corrosion of the pump’s components advance, causing the pump to
malfunction.
③
If chemicals including acid has been evacuated, the pump may become
rusty while it is not being operated (i.e. overnight), making operation
impossible. If such chemicals are evacuated, replace the pump oil
immediately.
④
Do not block the flow of air to the motor fan as the temperature of the
motor and pump will increase.
5.3
Start of operation
Show normal operational method of this pump with a system of Fig.3.
(
１
) Close main valve and vent valve, and turn on a fore pump.
(
２
) Turn on a mechanical booster pump.
(
３
) Open main valve, and start pumping for vacuum vessel.
5.4
Stopping the operation
When you stop these pumps, close main valve, and stop the mechanical
booster pump, and stop a fore pump afterwards.
Then open vent valve, and assume the pumps inside atmospheric
pressure.
Note
Let MBS-053/MBS-053-01 detects load of a pump and a condition of magnet
coupling and change operation mode of the motor automatically. Rotation can
reduce its speed in process of pumping down, but this is not a failure. Explain
details of operation mode as follows.