20
4.5 Installation
Placement
The tank must be placed in the excavation pit using suitable
equipment and positioned on the clean layer (see also chapter
“Transport”).
Please note:
Weather effects or cooling of the tank during the installation
phase (due to filling with cold water) can cause dimensional de-
viations from the data given in the catalogue.n. Therefore, please
check the height specifications in particular before installation.
Filling the tank
Fill the tank up to the outlet with water. If a leak test is required,
fill higher accordingly and then discharge back down to the
outlet level.
Backfilling the excavation pit
The tank encasing must be at least 50 cm wide. The individual
layers of fill should not exceed 30 cm. They must be compacted
using light compacting equipment (min. D
pr
=97%). Damage to
the tank wall and shifting of the tanks during and after instal-
lation must be prevented. For installation in areas driven over
by trucks (cover load class D), a load distribution slab must be
provided as the top layer. A respective formwork plan and rein-
forcement drawing can be provided by KESSEL.
Tank connection
Once the excavation pit has been backfilled and compacted up
to the bottom of the inlet and outlet pipe connections, the inlet/-/
outlet pipes must be laid at a frost-free depth and connected.
Insert the KESSEL telescopic upper section into the opening of
the separator and move to the required position.. The clamping
ring provided can now be used to fix the upper section in the
required position (aligned with the ground surface level).. The
fine adjustment to the final height is then effected using the
adjusting screws. Ground slopes can be levelled out easily by
the continuously height-adjustable and inclinable upper secti-
on. The upper section must then be sufficiently backfilled and
compacted.
For larger installation depths, the specially designed KESSEL
extension section must be used.
The maximum light liquid storage quantity of the separator with
automatic closure device, based on a light liquid density of 0.85
g/cm3 and the excess depth of
t
he stored quantity above the rele-
vant level of the wastewater inlet are given in the following table:
To prevent light liquid from escaping from the separator or upper
section, they must be installed so that the clearance height from
the bottom of the covers to the relevant wastewater inlet level
corresponds to the potential excess depth of the stored quantity.
The relevant level is
- the top of the lowest connected wastewater drain, if no
surface water is discharged into the separator.
- the highest possible surface water level, if surface water is
also discharged into the separator.
Compliance with the clearance height is a safe measure to pre-
vent discharge of light liquid.
4.6 Installation levels for probes
Tank system
LW 800
LW 1000
917801
Height of layer
thickness mea-
suring device,
measured from
the inner basen
(in mm)
410
522
917802
Height of back-
water probe,
measured from
the inner base
(in mm)
826
990
NG
Sludge trap
(l)
Oil storage
(l)
Excess depth
(mm)
1.5
1.5
1.5
LW
(mm)
400
800
100
17
130
360
17.6
70.5
110
50
50
70
4. Installation and assembly
