Excavation Pit; Tests Before Assembly; Assembly; Installation Requirements - Kessel NS 25 Bedienungsanleitung

During interim storage of the separator and up to the end
of the installation work, suitable safety measures must be
taken on the construction site to avoid accidents and da-
mage to the light fluid separator.
The Chapter Safety Instructions must be observed!

5.1 Installation requirements

The installation must be carried only by companies who have
the necessary specialist experience, suitable equipment and
adequately trained personnel for the task.
The soil characteristics must be investigated for technical con-
struction suitability (soil classification for technical construction
purposes, DIN 18196). The maximum ground water level likely
to occur must also be established. The ground water level must
not exceed the level of the outlet. Adequate drainage of see-
page water is also essential in the case of soils impermeable to
water. The types of stresses occurring, such as maximum traf-
fic loads and installation depth, must also be clarified.
The separators for ground installation should be installed out-
side the building, as near as possible to the outlets. If neces-
sary, the connection pipes of the inlets to the separator should
be laid with heat insulation, or heated. The required frost-free
installation depth is achieved by the use of telescopic attach-
ment pieces, which also allows easy adjustment to feed and ou-
tlet pipes (drainage system). The covers for the load classes A
/ B and D are not bolted and comply with EN 124.

5.2 Filling material

Substrate: Round-particle gravel
(max. particle size 8/16) to DIN 4226-1
Tank bed: Sand
Tank jacketing: Round-particle gravel
(max. particle size 8/16) to DIN 4226-1
Area outside tank jacketing:
Material with suitable properties
Covering layer: Humus or similar
5.3 Construction pit
The foundation must be horizontal and level in order to be able
to set up the system over the full surface, and must also afford
adequate load-bearing capability. The substrate consists of
compacted round-particle gravel (max. particle size 8/16, mini-
mum depth 30 cm, Dpr=95%), covered by 3 - 10 cm of com-
pacted sand. The spacing between the construction pit wall
and the tank must be at least 70 cm. The embankments must
be constructed to DIN 4124. The depth of the construction pit
should be such that the limits of the earth covering are not ex-
ceeded.
MIN ≤ TEÜ ≤ MAX (see dimension drawing in the Chapter on
Technical Data).
● Root penetration
In case of installation in the vicinity of trees or shrubbery, pe-
netration by roots must be reliably prevented.
● Installation on a sloping site
In case of installation of the separator on a sloping site, care
must be taken to ensure that the laterally-acting soil pressure

5. Installation and assembly

of unsecured soil is absorbed by a suitably dimensioned sup-
porting wall.
● Frost-free depth for all-year-round use
Always take care to observe the locally established frost-free
depth when installing the separator. In order to ensure the
smooth operation even in winter, the inlet and outlet pipes must
also be laid at a frost-free depth during installation.

5.4 Tests before installation

Immediately before installation of the tank in the construction
pit, the responsible specialist of the company carrying out the
installation must test and certify the following:
- the integrity of the tank wall;
- the proper condition of the construction pit, in particular with
regard to the dimensions and substrate bedding;
- the particle size of the filling material.
≥ 50cm
yyyyyyyyyy
§ nach
DIN 4124
≥ 70cm
Subbase: round-grain gravel (max. graining 8/16) according to DIN 4226-1
compacted with Dpr=95%
Tank bed: compacted sand
Tank
Tank encasing: round-grain gravel (max. graining 8/16) according to DIN
4226-1 compacted with Dpr=95%
Area outside tank encasing: material of suitable consistence
Top layer: topsoil, road surface, concrete or similar
Installation in groundwater is possible as long as groundwater
level does not rise above base of outlet.
5.5 Installation
The float and coalescence insert, if fitted, remain in the tank du-
ring installation.
● Insertion
The tanks must be placed carefully in the construction pit with
the aid of suitable lifting equipment and positioned on the sub-
strate bedding (see also the Chapter "Transport").
● Filling of the tank and the backfilling construction pit
In order to avoid deformation of the tank, the filling of the tank
with water and the construction pit should take place in paral-
lel. The tank jacketing should be applied to a width of at least
50 cm. The backfilling around the tank should take place in 30
cm incremental layers. Each layer should be compacted with
light compaction devices (min. Dpr=95%). Damage to the tank
wall and displacement of the tank during and after installation
must be avoided. The self-actuating closure keeps the system
closed during the complete filling process.
26
≤ 20cm
≤ 30cm
≤ 30cm
≤ 30cm
≤ 30cm
≤ 30cm
≥ 50cm
≤ 30cm
≤ 30cm
≤ 30cm
≤ 30cm
3-10cm
≥ 30cm
≥ 70cm