en
Installation and electrical connection
16
WILO SE 2019-02
Work steps
1
6
5
3
4
2
S1
S2 / S3
Fig. 6:
Portable wet well installation
1
Pump support foot
2
Pipe elbow with hose connection or Storz pipe coupling
3
Storz hose coupling
4
Pressure hose
5
Lifting equipment
6
Attachment point
‡
Pump support foot mounted.
‡
Pressure connection prepared: Pipe elbow with hose
connection or pipe elbow with Storz coupling mounted.
1. Use a shackle to attach the lifting equipment to the at-
tachment point of the pump.
2. Lift the pump and lower it at the intended location
(chamber, pit).
3. Place the pump on a solid bearing surface.
CAU-
TION! Sinking must be prevented!
4. Lay the pressure hose and fasten it to a certain point
(e.g. drainage).
DANGER! Separation or movement of
the pressure hose can lead to (serious) injuries! Se-
curely attach the pressure hose to the outlet.
5. Lay the power supply cable properly.
CAUTION! Do not
damage the power supply cable!
▶ The pump is installed, the qualified electrician can make
the electrical connection.
6.4.5
Level control
With a level control device, the current fill levels are determined
and the pump is switched on and off automatically depending on
the fill levels. Fill levels are recorded by using different sensor
types (float switches, pressure and ultrasound measurements or
electrodes). The following must be observed when using a level
control device:
ƒ
Float switches can move freely!
ƒ
The water level must
not fall below
the minimum permissible!
ƒ
The maximum switching frequency
must not be exceeded
!
ƒ
If the fill levels fluctuate strongly, a level control with two
measuring points is recommended. This makes it possible to
achieve larger differential gaps.
Use of attached float switch
The “A” version is equipped with a float switch. The pump is
switched on and off depending on the fill level. The switching
level is determined by the cable length of the float switch.
Use of on-site level controls
When using an on-site level control device, refer to the manufac-
turer’s own installation and operating instructions for specifica-
tions on the installation.
6.4.6
Dry-running protection
Dry-running protection must prevent the pump from operating
without fluid and air from entering the hydraulics. The minimum
permissible fill level must be determined with the help of a signal
transmitter. Once the specified limit value is reached, the pump
must be deactivated with an appropriate signal. Dry-running pro-
tection can expand the available level controls by an additional
measuring point or function as an independent switch-off
device. Depending on the system security, the pump can be re-
started automatically or manually. Installation of dry-running
protection is recommended for optimum operational reliability.
6.5
Electrical connection
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
ƒ
The mains connection must match the specifications on the
rating plate.
ƒ
Power supply on mains side for three-phase current motors
with clockwise rotating field.
ƒ
Lay the connection cable in accordance with the locally ap-
plicable regulations and connect it according to the wire as-
signment.
ƒ
Connect the monitoring devices and check their function.
ƒ
Earth the device properly in accordance with applicable local
regulations.
