Installation
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Powerlift prefabricated pumping station
Outdoor cabinet for accommodation of a backflow loop
Specifications:
■
The construction materials used and installation method must not cause any harmful
deformations, damage or unfavourable load cases for the outdoor cabinet.
■
Install the backflow loop not necessarily “filling the cabinet”. It is sufficient if the pipe
bottom of the backflow loop is located above the backflow level on site.
An outdoor cabinet for accommodating
the backflow loop can be purchased
from ACO as an optional product.
Î
Make a hole in the ground for the
outdoor cabinet (3), note the buried
depth (1) (
outdoor cabinet data
sheet).
Î
Make the foundation (2) for the outdoor
cabinet (3).
Î
Install and fix the outdoor cabinet (3)
onto a foundation (2).
Î
Install the on-site pressure pipe in the
outdoor cabinet as a backflow loop (4).
Î
Backfill the excavated hole.
4
3
2
1
3.3.11 Backfilling the excavation
Specifications:
■
The construction materials utilised and installation method must never cause any
harmful deformations, damage or unfavourable load cases for the manhole base section
and shaft components.
■
Bed in the manhole base section all round (
≥
0.50 m) with a fine-grained sand-gravel or
sand-crushed rock mixture of the soil groups GW or GI according to DIN 18196.
■
The backfill material must be placed in layers (
≤
30 cm high) and compacted with
lightweight compacting equipment to a Proctor density of Dpr
≥
97%.
■
The frame of the cover should never be higher than the surfacing, rather the surfacing
should be slightly higher and drawn up at the edge of the frame.
■
On laying the surfacing (e.g. asphalt surface) the cover must not be moved.
■
The shaft structure may not be loaded until the excavated pit has been completely
backfilled and the materials used have cured sufficiently.
Î
Backfill the excavation pit.
