Adding Fluid And Bleeding The System; Position Transmitter - Vexve Hydrox HCU Remote Installation, Operation And Maintenance Instructions

6.5. Adding fluid and bleeding the system

1. The hydraulic fluid reservoir volume is 2 liters and should be filled to ¾ of its volume. The hydraulic
fluid should be selected according to the hydraulic actuator supplier's recommendations.
2. Bleed all air from the system in accordance with the actuator supplier's instructions.

6.6. Position transmitter

Before the HCU Remote can operate, the hydraulic actuator position transmitters need to be calibrated.
Calibration is done in accordance with the position transmitter instruction manual.
HCU Remote is based on the assumption that the actuators are equipped with position transmitters that
send signals in accordance with the following:
· 2 digital signals at end positions (open / closed)
· An analog signal 4-20 mA, which covers the whole valve travel (4 mA = valve closed and 20 mA =
valve open)
· The HMI display that shows the whole range from 0% and 100% of valve travel is defined to match
the 4-20 mA signal from a 0-degree to a 90-degree turn. If the position detection does not work as
desired, then the sensor needs to be recalibrated.
Position transmitters provided by Vexve for use with this control cabinet comply with the above definitions.
Position transmitter signal cables are connected to the M12 5-pin connectors that are available at the
electrical cabinet of the Hydrox HCU Remote. These cables follow standard sensor wiring from M12 con-
nectors as shown in figure 10 and table 11.
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