Elecro Engineering H.R.UV-C SPA-PRO, Инструкция по установке и эксплуатации

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The Flow can be reversed by rotating the flow switch 180 degrees (i.e. ½ turn - see Fig. 6).
WARNING:
The flow switch paddle can be damaged when reversing the flow direction if it is
lifted by more than 5mm from its housing and turned with force. If the flow switch
has been rotated it is important to ensure that it is finally locked in the correct
orientation perpendicular (at right angles) to the flow of water.
3.4 Connection
The unit is supplied with unions to allow connection to 2" or 63-mm rigid pipe. Reducers are also supplied
to allow connection to 50-mm or 1½" rigid pipe - see Fig 7.
For pipework 63-
mm or 2” in diameter.