Grundfos CR Serie Instrucciones De Instalación Y Operación página 22

13.2.5 CR, CRN 32, 45, 64, 90, 120, and 150
1. Make sure pump shaft is all the way down. Tighten the set
screws on the mechanical shaft seal.
2. Place the plastic adjusting fork under the cartridge seal collar.
See fig. 19.
Fig. 19 Coupling adjustment CR, CRN 32, 45, 64, 90, 120,
and 150
3. Fit the coupling on the shaft so that the top of the pump shaft
is flush with the bottom of the coupling chamber. See fig. 20.
Fig. 20 Coupling adjustment, CR, CRN 32, 45, 64, 90, 120,
and 150
To avoid damaging the coupling halves, ensure
Caution
that the motor shaft keyway is centered in the
coupling half as shown in fig. 16.
4. Lubricate the coupling screws with an anti-seize, lubricating
compound. Tighten the coupling screws (finger tight) while
keeping the coupling gap equal on both sides and the motor
shaft keyway centered in the coupling half as shown in fig. 16.
When the screws are tight enough to keep the coupling in
place, then cross-tighten the screws.
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5. Tighten coupling screws to 62 ft-lbs (75 and 100 hp motors to
74 ft-lbs). Remove the adjusting fork from under the cartridge
seal collar and replace it to the storage location. See fig. 21.
Fig. 21 Adjusting fork storage CR, CRN 32, 45, 64, 90, 120,
and 150
6. Check to see that the gaps between the coupling halves are
equal. Loosen and readjust, if necessary.
7. Make sure the pump shaft can be rotated by hand. If the shaft
cannot be rotated or it jams, disassemble and check for
misalignment.
8. Prime the pump.
9. Follow the wiring diagram on the motor label for the correct
motor wiring combination which matches your supply voltage.
Once this has been confirmed, reconnect the power supply
leads to the motor.
10. Check the direction of rotation by bump-starting the motor.
Direction of rotation must be left to right (counter-clockwise)
when looking directly at the coupling.
11. Switch off the power, then mount the coupling guards.
When the coupling guards have been mounted, the power can
be switched on again.