PUMP INSTALLATION AND ALIGNMENT
GRUNDFOS
WHITE PAPER | 2
(2) Angular in horizontal plane, (3) Parallel,
side-to-side, and (4) Parallel, top-to-bottom.
•
NOTE: After any adjustment, both parallel and
angular alignment should be rechecked.
•
NOTE: Straight edge and feeler alignments
depend on couplings being square and parallel
to shaft. (Make sure they are firmly affixed to
each shaft.)
TIGHTEN TO FOUNDATION
•
Tighten foundation bolts evenly, but not too
firmly. Do not fully tighten foundation bolts
until grout has fully set. (Approximately 48
hours.)
•
Recheck alignment. At this point, again,
straight edge and feeler alignment should suf-
fice.
•
Grout. Leave shims in place.
•
Align. At this point dial or laser alignment is
recommended.
PIPING
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Pipe from the pump, taking care to properly
support all piping.
•
Check alignment and realign as necessary.
•
Check rotation
•
(To check rotation, it is best to do so without
the couplings connected. It is imperative to
disconnect the couplings if rotation is to be
checked before the unit is primed.)
PRIMING
•
Prime the pump, assuring that air is properly
bled from the unit.
•
Connect the couplings and perform a “semi-
final” alignment before starting, using dial
indication or laser alignment.
PUMP START-UP
•
Run the pump long enough for operating tem-
perature to be stabilized.
•
Shut the pump down and recheck alignment.
(Use dial indication or laser alignment.)
RUN THE PUMP
•
Run the pump for a week or more, shut it down
and recheck alignment, possibly caused by pipe
or temperature strains. (Use dial indication or
laser alignment.)
•
If alignment has remained correct, and only if
Figure 2.
Feeler and straight edge alignment
