RW-OUT571 Differential Oil Pressure Sensor | Bitzer Part-No.34731711

RW-OUT571 Differential Oil Pressure Sensor | Bitzer Part-No.34731711

Installation instructions

Mounting: The maximum torque of the screw-in unit is about 75Nm and has to be ensured by a ring spanner or a socket key. After mounting, check the seal. Follow the rules when working on refrigeration systems!

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               Insert the evaluation unit in the screw-in unit and screw tight by hand with the coupling ring (torque about 10Nm).Make sure that the cable outlet points down. The electrical connection needs to be carried out according to proposal in the wiring diagram.

The unit must be connected by trained electrical personnel.

Application

RW-OUT571 servers to monitor the oil differential pressure of oil pumps in refrigeration compressors. For this a screw-in part that is mounted directly in the pump housing is evaluated for differential pressure measurement.

The screw-in part is thereby connected by internal channels with the suction and high pressure side of the pump. Supplementary pipe connections are not needed. The evaluation unit is fastened by a coupling ring in the screw-in part and can be removed without opening the oil/refrigeration circuit. Once the supply voltage has been switched on, the relay trips after a 3 second delay time. With the operating recognition signal, which is applied to D1 of motor contactor (see wiring diagram), the differential pressure monitoring is activated after the expiration of a starting transition time. A missing differential pressure leads to a locked switch off after 90 seconds; with differential pressure fluctuation appropriately later (time integration).The monitoring of internal errors is always active. Any faults that occur in any operational phase lead to a locked switch off of the relay after 5 seconds. The potential-free, contact can be looped into a safety circuit without an auxiliary relay. An installation check monitors the proper assembly. The built-in LED indicates the operating state.

Flash code of the red LED

10Hz flashing: internal error

voltage supply too low

Not screwed into screw-in part

Continuous light: No differential pressure available

Off: Differential pressure OK, no error

Technical specifications