Grundfos CR 1s Instrucciones De Instalación Y Funcionamiento página 5

Step Action
Remove three screws from
2
the coupling.
Slacken the last screw with a
3 hexagon key, but do not
unscrew it completely.
Loosen one coupling half by
gently tapping the end of the
4
hexagon key with the flat
hand.
6
Illustration