Mechanical Installation; Installing Thesolution - Grundfos iGRID Montage- Und Betriebsanleitung

4.1.1 Foundation layer
• If soil analyses and information concerning the strain of the
pumping station indicate that the soil cannot support the weight
of the product, a foundation layer must be prepared.
• The bedding layer on which the pumping station is placed is not
regarded as a foundation layer.
• The foundation layer can be constructed by adding a stable
layer of suitable gravel after excavation which is compacted in
layers of no more than 30 cm corresponding to approximately
20 cm after compaction. A foundation layer is also necessary if
the hole was mistakenly dug too deep.
4.1.2 Bedding layer
• The material for the bedding layer must be compactable and
composed so that neither its properties nor the compaction will
cause damage to the pumping station.
• Particle size over 16 mm must not occur.
• The content of particles between 8 and 16 mm must not exceed
10 %.
• The material must not be frozen.
• Sharp flint and similar must not occur.
• The bedding layer must have a thickness of 10 cm.
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5. Mechanical installation

5.1 Installing the solution
Install a sensor to detect water on the floor and to cause
an alarm to sound in case of flooding and malfunctions in
the pit.
Do not alter the design of the solution.
DANGER
Fall hazard
Death or serious personal injury
‐
Make sure to mark off the area around the solution.
‐
Follow local regulations when working at the solution.
‐
Use the ladder and handles when descending into the
pit.
WARNING
Risk of being hit by a vehicle
Death or serious personal injury
‐
Make sure to mark off the area around
the solution when working in the pit.
‐
Follow local regulations when working at the solution.
WARNING
Overhead load
Death or serious personal injury
‐
Do not stand under or close to hanging load.
‐
Follow local regulations when working at the solution.
WARNING
Overhead load
Death or serious personal injury
‐
Make sure that the lifting equipment is appropriate for
lifting the load before lifting the solution. See the
weight on the nameplate.
WARNING
Overhead load
Death or serious personal injury
‐
Position the support for the lifting equipment at a safe
distance away from the hole to prevent it from
collapsing.
‐
Follow local regulations when working in and in
proximity to the pit.
‐
Before installing the pit, make sure that the foundation
and bedding layer have been carried out according to
the guidelines in section about preparing the
foundation.
Check for external damage to the solution before lowering it into
place. Once the solution is installed, no claims can be made against
Grundfos for any damage.
To install the solution, do the following:
1. Place the pit on the bedding layer.
• Check that the pit is level or leaning slightly towards
the drainage pump.
2. Perform the backfill. Make sure that the backfill is carried out
according to the guidelines in section about backfill.
• Groundwater must not rise above the bedding layer until the
backfill is completed.
• Compact the backfill around the pit up to the lower part of the
pipe connection before connecting the pipes.
Related information
4.1 Preparing the foundation
5.1.3 Backfill