Quincy QSV 2200, Instruction Manual

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Section II - General description
18 Quincy Vacuum Pump-QSV Series
2.4 Condensate system
When discharge piping is used, water in the discharge air can condense in the piping and is accumulated in
the collector of the outlet pipe, where a drain point (Dr) is available.
The pump leaves the factory, with this drain point connected and the external valve (EV) supplied as loose
part. Preventing condensate collection in the oil separator will extend oil life.
Consult local regulations, which are applicable for water drainage.
2.5 Regulating system
Description
If the vacuum process demand is less than the throughput of the vacuum pump, the vacuum pressure
decreases. When the pressure is lower than the set-point (desired vacuum pressure), the regulator
decreases the motor speed.
If the vacuum pressure decreases and the motor operates at minimum speed, the regulator stops the motor.
When the motor is stopped automatically and the vacuum pressure comes to the set-point, the regulator
starts the motor again.