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NMFIRE NFPA20 - 4.2.1 Install check before starting

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43
4. Check the alignment.
5. Adjust the position of the
motor,Loosen the base
screw holding the motor.
6. Fill the gap sheet with
suitable thickness.
7. Again tighten the base
screw to the correct torque.
Back to Step 3, re-check the
alignment.
8. Measure S2: check the S2
distance of the entire
circumference of the
coupling.
If the S2 value is within the
allowable error range, the
alignment over. If the
allowable error is exceeded,
go back to step 5.
Note: S2 is the diaphragm thickness plus the allowable clearance. It is recommended that

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