Installation And Assembly; Preparation Of The Excavation; Preparation Of The Modules And The Connecting Piece - Graf DN 400 Notice D'installation Et D'entretien

6.1

Preparation of the excavation

So that sufficient work space is available and the shaft can be compacted evenly, the floor area of the
excavation pit must be larger than the shaft dimensions by at least 300 mm on each side. If necessary an
embankment is to be created according to DIN 4124. The building ground must be horizontal and even
and must guarantee a sufficient load capacity. The depth of the excavation pit must be dimensioned such
that the maximum installation depth to the shaft bottom is not exceeded. As a stable substrate, a layer of
rounded gravel (granulation 8/16 according to DIN 4226-1) must be laid with a thickness of at least
100 mm.
Important: In order to be able to use the system all year round, the water carrying parts must be installed
in frost-free areas.
6.2

Preparation of the modules and the connecting piece

6.2.1 Shortening of the VS-Shaft System DN 400
The desired installation depth can be reached by cutting the distributor module, the extension module or
the inlet module.
Infiltration distributor module DN 400
Effective length: 650/ 1000 mm

6. Installation and assembly

330340
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Infiltration connecting piece DN 400
Effective length: 250/ 500 mm
21 / 50
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