Initial operation / configuration
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5.3
Functional check
Follow the safety instructions 3 chapter 3.
5.3.1 Watertightness test in accordance with EN 13564
Only for backwater valve type 2 (two backwater flaps).
• Close the emergency closure <3> (se5.6)
• Screw the screwed sealing plug out <1>
and the funnel <2> in
• Fill water up to the testing pressure level of 10 cm in
the funnel (accessory: art. no. 70214)
• Observe the filling level in the funnel for 10 minutes,
keep to the original level by refilling if necessary
• The backwater valve is considered watertight
if no more than 0.5 litres of water have to be refilled
during this time. Subsequently: open
the emergency closure <3>, remove the funnel <2>
and screw the screwed sealing plug <1> back in
again. The backwater valve housing must not show
signs of leaks
• Open the emergency closure <3> again
1
2
3
Ill. [15]
