Bell & Gossett DN0141D Domestic Pump 2′ NPSH Horizontal Pumps Series DB-F - Manual (Page 3)

3
LEVELING
Place the pump on its concrete foundation supporting it with
steel wedges or shims totaling 1" in thickness. These wedges
or shims should be put on both sides of each anchor-bolt to
provide a means of leveling the base. (See below.)
IT IS VERY IMPORTANT THAT THE PUMP-BASE BE SET
LEVEL TO AVOID ANY MECHANICAL DIFFICULTIES WITH
THE MOTOR OR PUMP. THIS PUMP WAS PROPERLY
ALIGNED (IF FURNISHED WITH A MOTOR) AT THE FACTORY.
HOWEVER, SINCE ALL PUMP BASES ARE FLEXIBLE THEY
MAY SPRING AND TWIST DURING SHIPMENT. DON’T PIPE
THE PUMP UNTIL IT IS REALIGNED. AFTER PIPING IS
COMPLETED AND AFTER THE PUMP IS GROUTED IN AND
BOLTED-DOWN, ALIGN IT AGAIN. IT MAY BE NECESSARY
TO RE-ADJUST THE ALIGNMENT FROM TIME TO TIME
WHILE THE UNIT AND FOUNDATION ARE NEW.
NOTE:
TO KEEP SHIMS IN PLACE
ALLOW NON-SHRINKING
GROUT TO FLOW AROUND
HOLD DOWN LUGS
ALLOW 1" FOR SHIMS.
PLACE ON BOTH SIDES
OF ANCHOR BOLTS
APPROX.
1" GAP
GROUT ONLY TO
TOP OF BASE RAIL
PUMP BASE RAIL
CONCRETE FOUNDATION
GROUT
PUMP BASE
LEVELING OF PUMP BASE
ON CONCRETE FOUNDATION
FLEXIBLE COUPLING ALIGNMENT
(SERIES DB-F PUMPS ONLY)
Check parallel alignment by placing a straight edge across the
two coupling flanges and measuring the maximum offset at
various points around the periphery of the coupling. DO NOT
rotate the coupling. If the maximum offset exceeds the .015,
realign the coupling.
Check angular alignment with a micrometer or caliper. Measure
from the outside of one flange to the outside of the other at
intervals around the periphery of the coupling. DO NOT rotate
the coupling. The difference between the maximum and min-
imum must not exceed .056".
If a correction is necessary, be sure to recheck the parallel
alignment.
(Note: For maximum life, keep misalignment values as near to
zero as possible.)
If the coupling employs the two-piece sleeve with the wire ring,
force the ring into its groove in the center of the sleeve. It
may be necessary to pry the ring into position with a blunt
screwdriver.
All alignment should be done by moving or shimming the motor
only. Adjustments in one direction may alter alignment in
another. Therefore, check alignment in all directions after a cor-
rection is made.
If couplings are to operate at speeds higher than 1800 RPM,
greater accuracy of shaft alignment will be required. A dial indi-
cator should then be used.
STRAIGHT EDGE
.015 MAX
CHECK PARALLEL ALIGNMENT
ANGULAR ALIGNMENT CHECK ANGULAR ALIGNMENT CHECK
DISTANCES ACROSS
COUPLER FLANGES
SHOULD BE EQUAL
(CHECK 4 PLACES)