Ulvac DA-20D Series, Инструкция по эксплуатации

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7. CAUTIONS IN OPERATION
For safe and trouble-free operation, please pay attentions for the following items in operating pump.
7.1 Cautions in Operation
(1) This pump is designed exclusively for vacuum pumping. So backing pressure of the pump is
needed to keep lower than 30kPa (Gauge pressure) by a reasonable means.
(2) Use the pump at an ambient temperature of 7~40°C.
(3) Use the pump in an environment where it is not likely that dust, dirt, etc. are admitted into the
pump.
(4) This pump is not designed explosion-proof. So do not use it in the vicinity of inflammable
solvent or the like, which can be very dangerous.
(5) This pump is only for dry air. When a large amount of vapour enters, it causes the breakdown.
(6) Start the pump with the suction side and exhaust side under atmospheric pressure. Otherwise,
it is not so easy to start the pump.
(7) If the pump is stopped under reduced pressure and is started immediately after that, the pump
may not restart. To restart it, vent the pump to atmospheric pressure.
If the pump is used for other applications, consult with us.
7.2 Startup in Cold Season
In a cold season, it may sometimes be difficult to start the pump due to hardened bearing grease,
diaphragm or others. In that event, proceed as follows.
(1) Vent the suction port to atmospheric pressure and turn ON/OFF the power switch until the pump
starts.
(2) Operate the pump for several minutes with the suction port vented to atmospheric pressure to
warm up the pump.
(3) Operate the pump as usual after the pump is warmed up.
7.3 Thermal Protector
(1) This pump incorporates a auto reset type thermal protector. It automatically cuts off the motor
power circuit to prevent the motor from being damaged by burning when the pump stops rotating
due to trouble or when the pump is energized with an overcurrent due to overload during
operation.
(2) If the thermal protector is activated, turn OFF the power switch and contact our representative or
ULVAC KIKO. Never touch the motor, which is still very hot.
(3) Restart operation after eliminating the cause of trouble and verifying that the motor temperature
has lowered.
Characteristics of the t
hermal protector
Operation temperature
135±5
℃
Reset temperature
85±10
℃