Incoming pipes 4 1 3 min 350 mm DN 20 DN 125 min 550 mm DN 150 2 Ongoing pipes Flow Return Return Flow min 350 mm DN 20 DN 125 min 550 mm DN 150 21 8 2014 FLEXWELL district heating cable FHK Subject to technical changes 5 505 Loop in method Building entries Facilities for drainage or venting must be provided by the customer or others depending on the elevation high low points For the size and positioning of wall openings see worksheets FHK 5 555 and FHK 5 560 Structure 1 FLEX W E L L district heating cable 2 Connector 3 Wall leadthrough 4 Wall opening sealed watertight by customer or others

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