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Installation and operating instructions Wilo-DrainLift M1/8
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7.3.5 Drainage of cellars
To automatically drain the installation area of faeces lifting units, a pump sump is to be put
in place in accordance with EN=12056-4 (Fig. 12).
• Design pump (item 10) according to the delivery head of the unit. The dimensions of the
pit in the floor of the installation area should be at least 500 x 500 x 500 mm.
• By switching, a 3-way cock (item 11, accessories) allows both the tank to be manually drai-
ned as well as the pump sump using a diaphragm hand pump (Pos. 12).
Fig. 11: Suction pipe connection for the diaphragm hand pump
3. Bevel the suction pipe (outer Ø 50 mm) at the
suction end (approx. 30° to 45°) and push it
through the seal all the way to the floor using
a lubricant.
4. Make sure the seal has an exact fit. Secure
the suction pipe using clamps so that it
doesn't slip out of the tank opening.
Fig. 12: Installation example
T
Backflow level (usually upper edge of street)
1
Ventilation pipe (over roof)
2
Pressure pipe
3
Inlet
4
Gate valve for inlet pipe
5
Fitting support for weight relief
6
Gate valve for pressure pipe
7
Non-return valve
8
Tank draining pipe
9
Pump sump drainage pipe
10
Drainage pump
11
3-way cock
12
Diaphragm hand pump
13
EC-Drain LS1 switchgear
EC-Dr
ain LS
13
12
10
9
8
7
6
5
3
4
2
1
11
