Installation for typ 70 70....
In automatic mode the level control can be operated via level controllers, level electro-
des or a oat switch, the possible connection options are as follows (take the required
sealing kits and bridge from the enclosed accessory pack):
Connection of level-electrodes in combination with submersible pumps
Insert sealing set with 2 x 5 mm leadthrough in cable entry M20. Connect upper level-
electrode to terminal B1, and lower level-electrode to terminal B2. Connect terminal PE
level controller and terminal B3 with enclosed bridge.
Connection of level-electrodes in combination with dry installed pumps
Insert sealing set with 3 x 5 mm leadthrough in cable entry M20. Connect the upper
level-electrode to terminal B1 and the lower level-electrode to terminal B2. Connect
earth electrode to B3. (please refer to the connection diagrams in the enclosed opera-
ting instructions for nder level-control-relay 72.01)
Connection of level-controllers in combination with submersible pumps or dry
installed pumps
Insert sealing set with 2 x 6 mm leadthrough in cable entry M20. Connect the upper
level-controller (normally open contact) to terminals B1 and B3, connect the lower
levelcontroller (normally open contact) to terminals B2 and B3. Connect PE of both level
controllers to terminal PE level control.
Connection of a oat switch
Insert the connecting cable of the oat switch through the M20 cable entry and con-
nect the normally open contact to terminals B1 and B3, connect PE of the oat switch
to terminal PE level control. The NOLTA KR2 oat switch (order number 40 0035 ..) is
recommended for use with low voltages.
Installation for typ 70 71....
In automatic mode, the level control can be controlled via a oat switch, to do this,
connect the cable ends of the oat switch as follows:
Insert the oat switch cable through the M20 cable entry. Connect the two wires of the
normally open contact to terminals S1 and S2 and the PE to terminal PE level control.
