Elmo Rietschle L-BV3 - Manual (Page 21)

Operation
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For automatic operation (Fig. 7, Pg. 19):
 Switch off the pump-motor unit.
 The solenoid valve (Item 4) closes,
and feeding of the operating liquid is cut off.
 The following applies for the control valve
(Item 3) for setting the operating-liquid flow
rate:
In case of an interruption in operation, the
valve setting (i.e. the valve position or the
open valve cross-section) is not changed.