Grundfos LSV Serie Montage- Und Betriebsanleitung Seite 7

3.2.5 Building up the foundation
The foundation procedure has three steps:
1. pouring of foundation
2. shimming of base frame
3. grouting.
Pouring of foundation
We recommend the following procedure to ensure a
good foundation:
1. Pour the foundation without interruptions to
within 19-32 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.
2. Embed anchor bolts in the concrete as shown in
figs. 6-7. Allow enough bolt length to reach
through grout, shims, lower base frame, nuts and
washers.
Bolt length
above base
frame
Thickness of
base frame
19 to 32 mm
allowance for
grout
Washer Lug
Fig. 6 Typical anchor bolt design
Anchor bolts for
supporting the base
Wedges or shims,
as required
Fig. 7 LSV anchor bolt installation
Let the foundation cure for several days before the
base frame is shimmed and grouted.
Base frame
Wedges and
shims left in
place
Top of
foundation left
rough
Pipe sleeve
LSV stands
Grouted pad for
anchoring or
housekeeping
Shimming of base frame
Fig. 8 Shimming of base frame and levelling of
pump
1. Lift or jack up the base frame to the final level
19-32 mm above the concrete foundation, and
support the base frame by means of blocks and
shims, both at the anchor bolts and midway
between bolts. See fig. 8.
2. Level the base frame by adding or removing
shims under the base frame. See fig. 8.
3. Tighten the anchor bolt nuts against the base
frame. Make sure the pipes can be aligned to the
pump flanges without putting strain on the pipes
or flanges.
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