Installation Requirements; Filling Material; Excavation Pit; Installation - Kessel 85323/120A Bedienungsanleitung

During the intermediate storage of the rainwater filter
and until completion of the installation work, suitable sa-
feguarding measures must be taken at the building site
to prevent accidents and damage to the rainwater filter.
The chapter "Safety instructions" must be heeded!
Installation must only be carried out by companies who are

4.2.2 Installation requirements

in possession of the technical experience, suitable imple-
ments and equipment as well as adequately trained person-
nel.
A measurement of the soil conditions with a view to its struc-
tural suitability must have been carried out (soil classificati-
on for structural purposes DIN 18196). The maximum gro-
undwater level that can occur must be established. A suffi-
cient drainage of seepage water is compulsory for soils that
are impermeable to water. The types of loads occurring such
as maximum travelling loads and installation depth must
have been clarified.

4.2.3 Filling material

Subbase: Round-grain gravel (max. graining
8/16) acc. to DIN 4226-1)
Tank bed: sand
tank encasing: Round-grain gravel (max. graining
8/16) acc. to DIN 4226-1)
Area outside the
tank encasing: material of suitable consistence
Top layer: Topsoil or similar
The foundation soil must be horizontal and level, so that the

4.2.4 Excavation pit

system can be put down onto its full surface, in addition, the
foundation soil must guarantee a sufficient load bearing ca-
pacity. As subbase a compacted round-grain gravel (max.
graining 8/16, thickness minimum 30 cm, Dpr≥95%) and on
top of that 3 - 10 cm compacted sand are necessary. The
clearance between excavation pit wall and tank must be at
least 70 cm. The slopes must comply with DIN 4124. .
Immediately before placing the tank into the excavation pit,
4..2.5. Tests before installation
the technical expert of the company that has been commis-
sioned to carry out the installation has to check and certify
the following:
- The sound condition of the tank wall;
- The proper condition of the excavation pit with a view to its
dimensions and base bedding;
- Consistence of the filling material graining.
4. Installation and assembly
≥ 70cm
Unterbau: Rundkornkies (max. Körnung 8/16) nach DIN 4226-1
verdichtet mit D
Behälterbett: verdichteter Sand
Regenwasserfilterschacht
Behälterumhüllung: Rundkornkies (max. Körnung 8/16) nach DIN 4226-1
verdichtet mit D
Bereich außerhalb
Behälterumhüllung: Material geeigneter Beschaffenheit
Deckschicht: Humus o.ä.
Once the excavation pit has been prepared, the inlet, outlet

4.2.6 Installation

and, if appropriate, ventilation pipes must be laid and
connected. The following points must be heeded
• Sufficient gradient in the direction of flow according to DIN
1986.
• The inlet pipe to the filter should be routed as a straight pipe
1 to 2 metres upstream from the filter. If bends cannot be
avoided for technical reasons, 90° bends should be avoi-
ded and be replaced by 2 x 45° or even better 3 x 30°.
These measures slow down the inflow to the filters and thus
increase efficiency.
• If a back-flushing unit is being used or is planned for later,
the pressure pipe (pressure hose) should be laid now. At
least the outlet to the rainwater storage tank should be as
short as possible and free of bends.
The tank encasing must be produced in a width of at least
Backfilling excavation pit
50 cm. The individual layers should not exceed a height of
30 cm. They must be compacted using light compacting
equipment (Dpr≥95%). Damage to the tank wall and a dis-
location of the tank during and after installation must be
ruled out.
22
≤ 20cm
≤ 30cm
≤ 30cm
3-10cm
≥ 30cm
≥ 70cm
≥95%
pr
≥95%
pr