Grundfos NB Installation And Operating Instructions Manual page 24

5.4.1.2 Levelling the base frame
Follow the steps below to level the base frame:
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.
A: 19-32 mm
2. Level the base frame by adding or removing
shims under the base frame.
3. Tighten the anchor bolt nuts against the base
frame.
4. Make sure the piping can be aligned to the pump
flanges without putting strain on pipes or flanges.
5.4.1.3 Grouting
If you have questions or doubts about the
grouting, please contact an expert on
grouting.
Grouting compensates for an uneven foundation,
distributes the weight of the unit, dampens vibrations
and prevents shifting. Follow the steps below to do
the grouting:
1. Use an approved, non-shrinking grout.
2. Embed reinforcing steel bars into the foundation
by means of 2K anchor adhesive glue.
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3. The number of steel bars depends on the size of
the base frame, but we recommend that you
distribute a minimum of 20 bars evenly over the
whole area of the base frame.
Example of foundation with minimum 20 bars
4. The free end of the steel bar must be 2/3 the
height of the base frame to ensure a proper
grouting.
5. Soak top of concrete foundation thoroughly, then
remove surface water.