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Installation and operating instructions • Wilo-Rexa MINI3-V05...-AU • Ed.01/2022-01
•
Frost-free location.
•
Lay the connection cable properly. No danger situations during
operation (stumbling, damage, and so on).
•
Float switch capable to move freely!
5.2.1
Stationary wet well installation
min. 450x450 mm
min. 18x18 in
min. 500 mm
min. 20 in
335 mm
13 in
238 mm
9 in
113 mm
5 in
416 mm
16 in
1
2
3
Fig. 2: Installation dimensions and switching points
1
Level: switch on
2
Level: switch off
3
Minimum water level for continuous operation (S1). Below
this level only intermittent operation (S3).
For stationary wet well installation, install the pump directly at the
pressure pipe. Observe the following points:
•
The connected pressure pipe is self-supporting. Do not support
the pressure pipe at the pump.
•
During operation, the pump may vibrate slightly. These vibra-
tions must transfer via the pressure pipe to the foundation.
•
Ensure a stress-free connection at the discharge port – do not
screw the pipe in too deep.
•
The pressure pipe must not be smaller than the discharge port.
•
Seal pipe connections with Teflon tape.
•
Install all specified valves in accordance with local requirements
(gate valve, non-return valve).
•
Lay the pressure pipe frost-proof.
•
Avoid air intake! Air in the pump and in the pipe system can lead
to delivery problems. Remove air pockets using ventilation sys-
tems!
•
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 determined backflow level!
✓
Place of use is prepared.
✓
Pressure pipe properly installed.
✓
Prepared pipe, with the length from discharge port to pressure
pipe.
✓
Pre-assembled hose nozzle removed. Unscrew the hose
nozzle from the discharge port.
1.
Screw the prepared pipe into the discharge port.
2.
Place the pump at the place of use.
CAUTION! To prevent the pump from sinking on soft sub-
strate, use a hard underlay at the place of use.
3.
Connect the prepared pipe to the pressure pipe (for example,
using a flexible hose section).
4.
Mount the connection cable at the pressure pipe and lay it to
the socket/power supply.
▶
Pump is installed.
5.2.2
Portable wet well installation
At portable wet well installation, the pump can be installed at any
point at the place of use. Observe the following points:
•
Secure the pump against falling over and moving (creeping)
during use.
•
Fasten securely the pressure hose at the hose nozzle.
✓
Place of use is prepared
✓
Min. inside diameter of pressure hose: 53 mm (2")
✓
Inside diameter of hose clip: 55 ... 70 mm (2.2 ... 2.8 in)
✓
Check the pre-assembled hose nozzle. The hose nozzle is
screwed into the pressure port as far as it goes.
1.
Slide the hose clip over the pressure hose.
2.
Slide the pressure hose onto the hose nozzle.
3.
Mount the pressure hose at the hose connection using the
hose clip.
4.
Position the pump at the place of use.
CAUTION! To prevent the pump from sinking on soft sub-
strate, use a hard underlay at the place of use.
5.
Lay the pressure hose. Fasten the pressure hose at an appro-
priate place (for example, drainage).
CAUTION! If the pump
places in a filled pit, hold the pump at a slight angle during
immersing. This action allows the air to escape from the
pump!
6.
Lay the connection cable to the socket/power supply.
▶
Pump is installed.
6
Electrical connection
•
Mains connection with correctly installed protective earth con-
ductor.
•
Install a residual-current device (RCD) with 30 mA.
•
Mains connection fuse protection: max. 15 A.
•
Check voltage (U) and frequency (f) data on the rating plate.
The values must correspond to the data of the mains connec-
tion.
Do
not
connect the pump if:
•
The connection cable is damaged.
Replace the connection cable by a qualified electrician or the
customer service.
•
A stand-alone inverter is in use.
A stand-alone inverter is used in autonomous power supplies,
for example, solar power supply. An inverter can generate over-
voltages. Overvoltages may destroy the pump.
•
A multiple plug socket or power strip is in use.
•
An energy-saving plug is in use.
The plug reduces the energy supply to the pump. The pump
may heat up too much.
6.1
Connection: Pump with plug
Provide a socket (type I) with earthing contact. To connect the
pump, insert the plug into the socket.
