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Installation and operating instructions • Wilo-Rexa PRO-S • Ed.01/2022-03
17
- Do not immerse the cable end in the fluid.
- Observe the bending radii.
▶
Pump installed, make the electrical connection.
6.4.4
Portable wet well installation
Attach the pump support foot (available separately as an accessory) to the pump. The
pump support foot allows the pump to be positioned anywhere at the place of use. A pres-
sure hose is connected on the discharge side.
•
Use a hard surface or underlay at the place of use to prevent sinking on a soft bearing
surface.
•
If the pump is used at the same location for a longer period of time, bolt the pump sup-
port foot to the floor. This reduces vibrations and enables quiet operation.
1
6
5
3
4
2
OFF!
S1
S2, S3
Fig. 5: Wet well installation, portable
1
Pump support foot
2
Pipe elbow with hose connection or Storz fixed coupling
3
Storz hose coupling
4
Pressure hose
5
Lifting equipment
6
Attachment point
S*
Non-immersed operating mode: Observe information on the rating plate!
✓
Place of use prepared.
✓
Pump support foot mounted.
✓
Discharge connection prepared: Hose connection or Storz coupling fitted.
✓
Soft bearing surface: solid surface available.
1.
Use a shackle to attach the lifting equipment to the attachment point on the pump.
2.
Lift and align the pump at the installation location.
3.
Place the pump on a firm bearing surface. Avoid sinking!
4.
Secure the pump against moving and falling over: Bolt the pump support foot to the
floor.
5.
Lay the pressure hose and fasten it properly at the appropriate place (e.g. drainage).
6.
Correctly route the connection cables.
CAUTION! Do not damage the connection
cables!
- No chafing or kinking.
- Do not immerse the cable end in the fluid.
- Observe the bending radii.
▶
Pump installed, make the electrical connection.
6.4.5
Level control
Provide a level control on site for level-dependent control of the pump.
DANGER
Risk of explosion due to incorrect installation!
If the level control is installed within a potentially explosive area, the sig-
nal transmitter must be connected via an Ex cut-off relay or a Zener bar-
rier. There is a risk of explosion if connected incorrectly! Connection
must be carried out by a qualified electrician.
6.4.6
Dry-running protection
Dry-running protection prevents the pump from being operated without fluid and air from
entering the hydraulics. For this purpose, the minimum permissible fill level is monitored
using an external control. When the minimum fill level is reached, the pump is switched off.
Furthermore, depending on the control, a visual and acoustic alarm is triggered.
The dry-running protection can be integrated into existing controls as an additional meas-
uring point. Alternatively, the dry-running protection can also work as a stand-alone shut-
off device. Depending on the system security, the pump can be restarted automatically or
manually.
Installation of dry-running protection is recommended for optimum operational reliability.
