Kessel EasyClean ground Multi NS 4 Einbau- Und Betriebsanleitung Seite 37

4.4 Digging out the excavations
The size of the excavations must include at least 50 cm
all round the outside of the tank as working space.
Excavate the slope angle β according to the in-situ soil
requirements.
Place subbase layer consisting of 30 cm deep compacted
crushed stone (0-16 mm grading range; 97% D
Place a levelling layer of sand (3-10 cm).
Influence zone of adjacent foundations:
Minimum distance from foundations (a = distance
between bottom edge of the chamber and bottom edge of
the foundation a = ΔH x 1.73).
4.5 Positioning and connecting the tank
Position and align the tank as described in the transport instruction.
Connect the inlet and outlet pipe.
Install the lip seals, upper sections and cover plates to ensure protection during the construction period. Ensure that the
upper section is level with the planned ground level.
Wastewater pipes and fittings made of the following materials may be connected to the inlet and outlet of the separator:
Polyvinyl chloride (PVC-U)
Polyethylene (PE)
Polypropylene (PP)
The following technical instructions must be followed:
The inlet and outlet must be laid with gravity flow.
The inlet and outlet pipes must be laid at a frost-free depth.
The inlet pipe should be connected to the downpipe with two 45° bends. A stilling section with length equal to approx. 10
times the diameter of the inlet pipe should be included in the design.
The inlet pipe must be routed additionally above the roof as a ventilation pipe. If the inlet pipe is laid over more than 10 m
(horizontally), a further ventilation pipe must be attached near the separator.
Do not make any additional connections to the tank.
Perform a leak test on the connections before back filling the excavations.
Do not drill into the tank!
Do not attach any additional inlets or outlets.
4.6 Prepare the cable duct
Notes on installing or preparing the layer thickness measuring device for grease separators:
The connection distance between the separator and the control unit must be kept as short as possible and must be laid
with a constant slope down to the tank.
Always make changes in direction with 45° bends.
Lay cable duct DN 40 (OD 50 mm).
Dismantle the cable gland of the cable gland set.
Pass through cable using a pull wire.
Connect the cable duct (1) to the tank using the cable
duct provided by the customer.
Pass through the probe cable, tightly close the cable
gland.
KESSEL recommends that a cable duct be installed for
all grease separators installed in the ground to enable
the layer thickness measuring device to be retrofitted at a
later date.
016-302E
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Installation and operating instructions
Fig.: Figure showing a cable duct on a tank
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