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Installation and electrical connection
20
WILO SE 2017-06
6.4.3
Stationary wet well installation
NOTICE
Delivery problems due to water level being too low
If the level of the fluid is lowered too much, the volume flow can be interrupted. Air
cushions can also form in the hydraulics, which can lead to inadmissible operational
behaviour. The minimum permissible water level must reach the upper edge of the
hydraulics housing!
The pump is installed in the fluid for the wet well installation. For this, a suspension unit
must be installed in the chamber. On the pressure side, the on-site pipe system is con-
nected to the suspension unit and on the suction side to the pump. The connected pipe
system must be self-supporting. The suspension unit must
not
support the pipe sys-
tem!
Work steps
6
1
5
2
3
4
Fig. 8:
Wet well installation, stationary
1
Gate valve
2
Non-return valve
3
Suspension unit
4
Guide pipe (provided by the customer)
5
Attachment point for the lifting equipment
6
Minimum water level
‡
Operating space/installation location is prepared for the installation.
‡
Suspension unit and pipe system were installed.
‡
Pump is prepared for operation on the suspension unit.
1. Use a shackle to attach the lifting equipment to the attachment point of the pump.
2. Lift the pump, swivel it above the chamber opening and slowly lower the guide
claw onto the guide pipe.
3. Lower the pump until it sets on the suspension unit and is connected automatic-
ally.
CAUTION! Hold the power supply cables slightly taut when lowering the
pump!
4. Loosen the lifting equipment from the lifting gear and secure it at the chamber
outlet against falling.
5. Have the power supply cables routed into the chamber by a qualified electrician
and route it outside properly from the chamber.
▶ The pump is installed, the qualified electrician can make the electrical connection.
6.4.4
Portable wet well installation
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It may cause burns. Allow the
pump to cool down at ambient temperature after switching it off!
WARNING
Separation of pressure hose!
Separation or movement of the pressure hose can lead to (serious) injuries. Securely
attach the pressure hose to the outlet! Prevent buckling of the pressure hose.
NOTICE
Delivery problems due to water level being too low
If the level of the fluid is lowered too much, the volume flow can be interrupted. Air
cushions can also form in the hydraulics, which can lead to inadmissible operational
behaviour. The minimum permissible water level must reach the upper edge of the
hydraulics housing!