ABB HD4/R Installation And Operating Instructions Manual page 18

6.3.4 Closing operation
Make sure that the springs of the operating mechanism are
loaded, as indicated by the yellow signal in the window (7).
Press the closing pushbutton (4). Closing is displayed by the
letter "I" in the red part of the window (6).
If there is a shunt closing release, the closing operation can be
obtained by remote control.
NOTE. The closing pushbutton is not available for the re-
movable version of the circuit-breakers (HAD/UniAir) with-
out PR521 protection release.
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6.3.5 Opening operation
Press the opening pushbutton (3).
Opening is displayed by the letter "O" in the green part of the
window (6).
If there is a shunt opening release, the closing operation can be
obtained by remote control.