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Owner Manual
1.3A-28001-B97
Subject to change without notice
• Change-over valve housing (1) operates as a 4/2- or 3/2 way
valve and is actuated by the DC gear motor (3).
• The motor (3) is started by the signal of the end-of-line pressu-
re switch.
Fig. 8: electric motor-operated change-over valve: principle of operation
1036b95
• The rotating motion of the motor (3) is converted by the eccen-
tric (6) and the connecting link (2) into a stroke of the piston (5)
which performs the reversing process.
• Once the piston has reached its opposite position the position
switch (4) switches the motor (3) off. The piston (5) remains in
its position until the motor starts again.
Mode of Operation
