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7.3.2 Preparing the baseplate for
anchoring
Fig. 6: Shims on the base surface
Fig. 7: Levelling screws on the base surface
Fig. 8: Levelling and aligning the baseplate
Fig. 9: Anchor bolts
69
The baseplate must be mounted on a firm base, which must be made
of high-quality concrete of sufficient thickness. The baseplate must
NOT be strained or pulled down on the surface of the base, but must
be supported so that the original alignment isn't changed.
Drilled holes for the anchor bolts must be provided in the base using
pipe sleeves. The diameter of the pipe sleeves is equivalent to about
2 ½ times the diameter of the screws, so that these can be moved to
reach their final positions.
Wilo recommends initially pouring the base up to about 25 mm below
the planned height. The surface of the concrete base should be well
contoured before curing. Remove the pipe sleeves after the concrete
cures.
If it is planned to pour out the baseplate, then a sufficient number of
steel rods (depending on the size of the baseplate) should be placed
evenly distributed in the base. The rods should project into the base-
2
plate by up to
/
.
3
• Thoroughly clean the base surface.
• Place shims (approx. 20-25 mm thick) on every screw hole on the
base surface (see Fig. 6). Alternatively, levelling screws can also be
used (see Fig. 7).
• For a length spacing of the fastening bores ≥ 800 mm, shims should
be additionally placed in the middle of the baseplate.
• Apply the baseplate and level this in both directions with additional
shims (see Fig. 8).
• Align the complete unit when installing on the base using a spirit level
(at the shaft/pressure port) (see Fig. 8). The baseplate should be hor-
izontal with a tolerance of 0.5 mm per meter.
• Fit anchor bolts (see Fig. 9) in the provided drilled holes.
NOTE:
The anchor bolts must fit in the fastening bores of the baseplate.
They must meet the relevant standards and be sufficiently long, so
that a firm fit in the base is guaranteed.
• Pour in anchor bolts with concrete. After the concrete has set, the
anchor bolts can be evenly and firmly tightened.
• Align the unit so that the pipes can be connected to the pump stress-
free.
WILO SE 07/2013
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