Wilo DrainLift WS 50 Basic Einbau- Und Betriebsanleitung Seite 53

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6.4.7 Connect the inlet
52
Installation and electrical connection
2 Pressure connection
Observe the following information when connecting the pressure pipe:
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Flow rate in the pressure pipe: 0.7 m/s (2.3 ft/s) to 2.3 m/s (7.5 ft/s)!
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Reducing the pipe diameter is not permitted!
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All connections must be completely tight!
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Lay the pressure pipe so that it is protected from frost.
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Install the gate valve.
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Building installation: Install the pressure pipe as a "pipe loop" to avoid backflow
from the public sewer.
At its highest point, the bottom edge of the pipe loop must be above the locally de-
termined backflow level!
‡
Pump chamber installed properly.
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Pressure pipe installed correctly to the discharge port according to consulting doc-
uments.
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Installation materials available:
1x clamp bolting or thread fitting
1. Push the clamp bolting onto the discharge port.
2. Insert the on-site pressure pipe into the clamp bolting.
3. Screw on the clamp bolting.
▶ Pressure pipe connected. Next step: Connect the inlet.
The inlet can be in the areas indicated for the chamber wall, as desired.
Fig. 7: Inlet areas
Note the following when connecting the inlet:
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Connect the inlet within the marked areas. If the inlet is outside the marked areas,
the following problems can occur:
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The connection leaks.
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Statics of the pump chamber are affected.
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Backflow into the inlet pipe.
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Avoid an inlet surge and air intake into the pump chamber. Lay the inlet properly.
CAUTION! Inlet surges or air intake into the pump chamber can cause the level
control device to malfunction!
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Lay the inlet pipe with a slope to the pump chamber so that it can drain automatical-
ly.
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All connections must be completely tight!
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Install gate valve in the inlet!
WILO SE 05