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4.2 Starting
Close the leak valve (B), open the vacuum valve (A) which is connected to the intake,
turn the pump power supply switch on, and start the pump. The pump starts to suck
and exhaust.
(Refer to Fig. 4.)
The pump may rotate slowly for several seconds to a minute and be difficult to start
when starting for the first time after not having been used for a long time or after
being disassembled and reassembled. This is due to the pump being overloaded
because the pump oil is not sufficiently distributed inside the pump. Either leave the
pump running in that condition to allow the pump oil to distribute throughout the
pump, or perform jogging (switching the pump on and off quickly) several times.
Operation may be possible if the leak valve (B) is opened. After the pump begins to
operate normally, close the leak valve (B), and return to normal operation. (Refer to
Fig. 4.)
(1) Failure to do so may result in burns. The pump gets hot during operation
(40-80ºC), so don’t touch the motor or pump body.
(2) Oil mist comes out of the exhaust when the pump is operated at high pressures.
Either attach an oil mist trap or attach a duct connected to outside the building.
The temperature of the oil inside the pump reaches 50-90ºC after a few hours of
operation.
If the oil temperature exceeds this range, it may indicate that something is wrong with
the pump, so please inspect the pump or contact Ulvac.
4.3
Operating when it is cold
The pump may rotate slowly for several minutes and be difficult to start when starting
for the first time when used when the ambient temperature is low. This is due to the
pump being overloaded because the pump oil viscosity has increased. Either leave
the pump running in that condition to allow the pump to warm up, or perform jogging
(switching the pump on and off quickly) several times. Operation may be possible if
the leak valve (B) is opened. After the pump has warmed up, close the leak valve (B),
and return to normal operation. (Refer to Fig. 4.)
Caution
Attention
