30
During the intermediate storage of the grease separator
and until completion of the installation work, suitable safe-
guarding measures must be taken at the building site to
prevent accidents and damage to the grease separator.
The chapter "Safety instructions" must be heeded!
5.1 Installation conditions
I
nstallation must only be carried out by companies who are in
possession of the technical experience, suitable implements
and equipment as well as adequately trained personnel.
A measurement of the soil conditions with a view to its structu-
ral suitability must have been carried out (soil classification for
structural purposes DIN 18196). The maximum groundwater
level that can occur must be established. A sufficient drainage
of seepage water is compulsory for soils that are impermeable
to water. The types of loads occurring such as maximum tra-
velling loads and installation depth must have been clarified.
The grease separator for underground installation should be in-
stalled outside the building as close to the drains as possible.
If necessary, the inlet connection pipes to the grease separator
should be routed heat-insulated or heated. The necessary frost-
free installation depth is achieved using telescopic upper sec-
tions and adaptation to the inlet and outlet pipe (sewer). The
covers for the load classes A / B / D are screwed odour-tight
and correspond to DIN EN 124.
Wastewater pipes and fittings made of the following materials
may be connected to the inlet and outlet of the separator system:
- Polyvinyl chloride (PVC-U ) acc. to DIN EN 1401-1 in connec-
tion with DIN 19534-3,
- Polyethylene (PE) acc. to DIN EN 12666-1 in connection with
DIN 19537-3 or
- Polypropylene (PP) acc. to DIN EN 1852-1
The specifications in DIN EN 124 and DIN EN 476 must always
be fulfilled.
5.2 Filling material
Subbase:
Round grain gravel (max. graining 0/16)
Tank base:
Sand
Tank encasing:
Round grain gravel (max. graining 0/16)
Area outside the tank encasing:
Material of suitable consistence
Top layer:
Topsoil or similar
5.3 Excavation pit
Prerequisites for the ground to be used
The foundation soil must guarantee sufficient load-bearing ca-
pacity According to ATV-DVWK-A 127, the separator system
may only be installed in soils of
- Group G1 or G2 or
- Group G3 or G4 compacted with at least Dpr = 97%, whereby
in this case provision must be made for the sufficient drainage
of seeping water.
Preparation of the excavation pit
The foundation soil must be horizontal and level so that full-
surface set-up is possible. Compacted gravel 0/16 (at least 30
cm deep, Dpr=97%) must be planned as the subbase, and
must be compacted layer by layer with a maximum layer thickn-
ess of 30cm/layer. 3-10 cm sand are required for the bed, com-
pacted to Dpr=97%. The clearance between excavation pit
wall and tank must be at least 50 cm. The requirements of DIN
4124 must be fulfilled with regard to the slope angle. The depth
of the excavation pit must be dimensioned in such a way that
the limits of soil cover are not exceeded.
MIN ≤ DSC ≤ MAX (see "Dimensional drawing" chapter).
5. Installation and assembly
햲
Subbase:
Gravel 0/16 compacted with Dpr ≥ 97%
햳
Tank bed: Sand compacted with Dpr ≥ 97%
햴
Separator: According to static calculation
햵
Backfilling:
Gravel 0/16 compacted with Dpr ≥ 97%
햶
Foundation soil:
G1 or G2 according to ATV-DVWK-A 127 or
G3 or G4 according to ATV-DVWK-A 127
compacted with Dpr ≥ 95%, whereby in this
case provision must be made for the suffi-
cient drainage of seeping water
햷
Top layer:
For Class E (SLW 60) load distribution plate
according to static calculations.
For Class E (passenger cars) load
distribution layer
햸
Top of the tank
3-10cm
≥30cm
≥
≥50cm
≥70cm
≥70cm
6
4
5
1
2
3
≥50cm
b nach
DIN 4124
7