Grundfos NK Series Installation And Operating Instructions Manual page 13
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- Installation and operating instructions manual (332 pages) ,
- Installation and operating instructions manual (13 pages) ,
- Installation and operating instructions manual (32 pages)
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7.2.1 Procedure
1. Preparing the foundation
2. Levelling of the base frame
3. Preliminary alignment
4. Grouting
5. Final alignment according to section
1: Preparing the foundation
We recommend the following procedure to ensure a good foundation.
Step
Action
Use an approved, non-shrinking concrete. Contact your
concrete supplier for advice if any doubts.
Pour the foundation without interruptions to within 19 to
1
32 mm of the final level. Use vibrators to ensure that the
concrete is evenly distributed. The top surface must be
well scored and grooved before the concrete sets. This
provides a bonding surface for the grout.
Embed foundation bolts in the concrete. Allow enough
2
bolt length to reach through grout, shims, lower base
frame, nuts and washers.
Let the foundation cure for several days before the base
3
frame is levelled and grouted.
2: Levelling of the base frame
Step
Action
Lift/jack up the base frame to the final level 19-32 mm
above the concrete foundation, and support the base
1
frame by means of blocks and shims both at the
foundation bolts and midway between bolts.
Level the base frame by adding or removing shims under
2
the base frame.
Tighten the foundation bolt nuts against the base frame.
3
Make sure the piping can be aligned to the pump flanges
without putting strain on pipes or flanges.
7.3
Alignment.
Thickness of
allowance for
Illustration
Bolt length
above base
frame
base frame
19-32 mm
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grout
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Washer
Lug
Illustration
Base frame
Wedges and
shims left in
place
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Top of foundation
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left rough
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Pipe sleeve
13
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