This is a motor for the Drypumping System microprocessor controlled, modular, dry pump package that provides unparalleled control and monitoring facilities. i/QDP pumps have enclosed, water-cooled motors and are therefore suitable for applications in clean environments where fan cooling is unacceptable.The pump-motor is cooled by water flowing through a cooling jacket which surrounds the motor. The pump-motor cooling circuit is separate from the pump cooling circuit. The cooling-water supply and return pipelines are connected to the pump by connectors on the water services panel at one end of the pump.

The iQ dry pumping system has integrated sensors, which continuously monitor key system performance parameters and give advanced warning of problems including pump and motor temperature, by way of integrated sensors. Three motor-protection thermistors are fitted to the pump-motor (one on each winding). These thermistors are solid-state devices which have an electrical resistance of 100 to 500 Ohms at normal pump-motor operational temperature. When the pump-motor is too hot, the electrical resistance rises quickly to 3000 Ohms. The thermistors are connected in series and you can use the output of the thermistors to shut down the pump because the motor is too hot. These motors are supplied configured for ‘low voltage’ operation (200-208 V at 50 Hz or 200-230 V at 60 Hz). To change the QDP80 Pump-motor to ‘high voltage’ operation, remove the pump-motor terminal-box cover, then remove the wires from the U1, V1 and W1 terminals. Reconnect the wires to the W2, U2 and V2 terminals, as per p.22 of the Edwards DRYSTAR QDP-40 IQDP-40 Operating Instructions (see downloads, at left).