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6.4.1
Base
Fig. 11: Installing the unit on a base
6.4.2
Preparing the baseplate for an-
choring
Fig. 12: Shims on the base surface
Fig. 13: Levelling screws on the base surface
Fig. 14: Levelling and aligning the baseplate
22
Installation and electrical connection
The base must be able to permanently support the unit installed on the baseplate. The
base must be level to ensure there is no tension on the baseplate or unit. Wilo recom-
mends constructing it using premium, non-shrink concrete of an adequate thickness.
This will prevent vibrations from being transmitted.
The base must be able to absorb the forces, vibrations and impacts that occur.
Guidance values for dimensioning the base:
ƒ
Approx. 1.5 – 2 times heavier than the unit.
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The width and length should each be about 200 mm longer than those of the base-
plate.
The baseplate must not be strained or pulled down onto the surface of the base. It must
be supported in such a way that the original alignment is not changed.
Prepare drilled holes for the anchor bolts. Position pipe sleeves vertically in the base at
the corresponding points. Diameter of the pipe sleeves: roughly 2½ times the diameter
of the screws. This allows the screws to be moved in order to reach their final positions.
Wilo recommends laying the base initially up to about 25 mm below the planned height.
The surface of the concrete base must be well contoured before it hardens. Remove the
pipe sleeves after the concrete hardens.
When the baseplate is laid, insert steel rods vertically into the base at regular intervals.
The required number of steel rods is dependent on the size of the baseplate. The rods
must project into the baseplate by up to 2/3.
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Thoroughly clean the base surface.
ƒ
Place shims (approx. 20 – 25 mm thick) on every screw hole on the base surface.
Alternatively, levelling screws can also be used.
ƒ
For a length spacing of the fixation bores ≥ 800 mm, shims should be additionally
placed in the middle of the baseplate.
ƒ
Apply the baseplate and level in both directions with additional shims.
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Align the unit when installing on the base using a spirit level (at the shaft/pressure
port).
The baseplate must be horizontal; tolerance: 0.5 mm per metre.
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Fit anchor bolts in the provided drilled holes.
NOTICE
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.
ƒ
Pour in anchor bolts with concrete. After the concrete has set, tighten the anchor
bolts evenly and firmly.
ƒ
Align the unit so that the pipes can be connected to the pump stress-free.
WILO SE 2020-10
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