Wilo -Rexa FIT Instrucciones De Instalación Y Funcionamiento página 43

7. Clean the screw plug, replace the seal ring and screw it
back in. Max. tightening torque: 8 Nm (5.9 ft lb)!
6.4.3 Stationary wet well installation
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!
The pump is installed in the fluid for the wet well install-
ation. For this, a suspension unit must be installed in the
chamber. On the pressure side, the on-site pipe system
is connected 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 system!
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
4
3
2
1
Fig. 5: Stationary wet well installation
1 Suspension unit
2 Non-return valve
3 Stop valve
Installation and operating instructions Wilo-Rexa FIT
Installation and electrical connection
5
6
S1
S2/S3
4 Guide pipe (provided by the customer)
5 Lifting equipment
6 Attachment point for the lifting equipment
‡
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 at-
tachment 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 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.
6.4.4 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
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!
en
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