Wilo Rexa UNI Series, Installation And Operating Instructions Manual

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en Installation and electrical connection
44 WILO SE 2019-02
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 automatically. 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.
6.4.5 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
Pumping problems due to water level being
too low
The hydraulics are self-venting. Smaller air cushions
are resorbed during pumping. If the fluid is lowered
too much, separation of the volume flow may occur.
The minimum permissible water level must reach the
upper edge of the hydraulics housing!
For portable installation, the pump is equipped with a
pump support foot. The pump support foot ensures min-
imum ground clearance in the suction area and enables
secure footing if placed on a solid bearing surface. In this
installation type, the pump can be installed anywhere in
the operating space/installation site. A hard base must
be used at the installation location to prevent sinking in
case of soft bearing surfaces. A pressure hose is connec-
ted on the pressure side.
CAUTION! If the motor emerges during operation, ob-
serve the operating mode for non-immersed operation
(S2-15, S3 10 %*)!
* Operating mode S3 25 % is permitted if the necessary
motor cooling is guaranteed before the motor is
switched on again! To ensure the required cooling, the
motor must be completely immersed for at least 1 min.
Work steps
1
2
3
4
5
S1
S2, S3
6
Fig. 7: Wet well installation, portable
1 Pump with integrated pump support foot
2 Pipe elbow with hose connection or Storz pipe coupling
3 Storz hose coupling
4 Pressure hose
5 Attachment point
6 Lifting equipment
CAUTION
Damage to the pump due to incorrect installa-
tion
Observe the following points during the installation of
the pump:
• Observe the max. permissible tightening torque:
15 Nm (11 ft·lb) (V05) or 25 Nm (18 ft·lb) (V06)
• Do not insert an additional gasket between the
flange and the accessories! A gasket is mounted
on the pump flange!
• Only use accessories with a flange shape in ac-
cordance with EN 1092-2, type A. The use of
other flange shapes is not permitted!
‡
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.