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6.5
Installing the pump unit on a base
6.5.1
Base
Fig. 5: Installing the unit on a base
6.5.2
Preparing the baseplate for an-
choring
Fig. 6: Shims on the base surface
Fig. 7: Levelling screws on the base surface
18
CAUTION
Danger of property and material damage!
A missing foundation or incorrect installation of the unit on the base can
lead to a malfunction of the pump. Incorrect installation is not covered
by the warranty.
• Only have the pump unit installed by qualified personnel.
• A professional from the concrete sector must be hired for all base
work.
The base must be able to support the unit installed on the baseplate indefinitely. The base
must be level to ensure there is no tension on the baseplate or unit. Wilo recommends using
premium, non-shrink concrete of an adequate thickness for manufacturing. This would pre-
vent oscillations from being transmitted.
The base must be able to accommodate the forces, oscillations and impact that occur.
Guidance values for dimensioning the base:
•
Approx. 1.5 to 2 x heavier than the unit.
•
The width and length should each be about 200 mm greater than the baseplate.
The baseplate must not be strained or pulled down on the surface of the base. It must be
supported so 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: Around 2½ x the diameter of the screws.
This allows the screws to be moved in order to achieve their final positions.
Wilo recommends initially pouring the base up to about 25 mm below the planned height.
The surface of the concrete base must be well contoured before curing. Remove the pipe
sleeves after the concrete cures.
When the baseplate is poured out, insert steel rods vertically into the base at regular inter-
vals. 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.
•
Thoroughly clean the base surface.
•
Place shims (approx. 20 – 25 mm thick) on every screw hole on the base surface.
Alternatively, levelling screws can also be used.
•
For a length spacing of the fixation bores ≥ 800 mm, shims should be additionally placed
in the middle of the baseplate.
•
Apply the baseplate and level in both directions with additional shims.
•
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.
•
Fit anchor bolts in the provided drilled holes.
NOTICE
The anchor bolts must fit in the fastening bores of the base-
plate.
They must meet the relevant standards and be sufficiently long, so that a
firm fit in the base is guaranteed.
Installation and operating instructions • Wilo-Atmos GIGA-NHT • Ed.01/2023-10
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