Yes, please refer to the IOM for the correct procedure. 

No, it is recommended to fit a strainer further upstream protecting a number of PICVs.

Yes, please refer to the IOM for flushing procedures and guidance. 

Yes, the unit is designed with 40mm connections and equal flow and return lengths for direct connection to FCUs. More about Fan Coils >

The PICV can be installed on either flow and return. Please ensure that the valve is installed with actuator. However, IP54 rated actuators can be mounted in any orientation. The flow direction arrow in the correct direction.

Yes, a Venturi device is provided as part of the unit to provide flow measurement.