-5-
For safe operation
CAUTION
Prevent foreign
matter from
entering
Danger of foreign matter entering
inlet
If you use the seal material or the
adhesive, etc. to prevent Leak of the joint
when piping with internal screw of inlet, be
careful not to enter the seal material or the
adhesive into an inlet.
The seal material or the adhesive entering
inlet can cause failure.
Start or stop
after closing
isolation valve
Danger of vacuum break and
pollution
Be sure to close isolation valve between
vacuum pump and vacuum system
(chamber) during start-up and stop.
Start-up or stop with isolation valve in the
open position can draw back gas and
debris attached to inside of pump to
vacuum chamber due to pressure
differential, resulting in vacuum break and
pollution on vacuum chamber side.
Bew are
temperat ure
of intake gas
Danger of exceeding permissible
temperature of intake gas
If intake gas temperature is over 50
℃
, be
sure to install a chiller or trap
between vacuum pump and vacuum
chamber so that gas intake temperature of
vacuum pump keeps below 50
℃
.
If not, vacuum pump temperature can
increase, resulting in failure.
Operate while
opening air-flush
port
Danger of remaining moisture
When evacuating moisture, be sure to
open air-flush port (air-flush opened
operation).
If you evacuate vapor while air-flush port
is closed, condensed water will remain
inside vacuum pump and cause failure.
Caution after
exhausting vapor
Danger of insufficient vapor
exhaust
After evacuating vapor, do air-flush
opened operation for at least one hour.
If you close air-flush port or stop vacuum
pump soon after evacuating vapor,
condensed water will remain inside
vacuum pump which will cause failure.
Beware of intake
gas volume
Danger of exceeding permissible
intake gas volume
When sending N
2
gas or dry air into
air-flush port, pressure should be the
same as atmospheric pressure and flow
rate should be less than 5L/min.
If not, it can increase pressure inside
vacuum pump, resulting in failure.
Caution for
frequent
start/stop and
short interval
Risk of motor malfunction
Refrain from frequent start/stop operation.
It induces malfunction of motor such as
burn out.
Please consult your distributor or factory
representative for details.
Appropriate operating mode with
adequate interval and frequency of
start/stop is varies owing to operating
condition.