Wilo Rexa UNI Instrucciones De Instalación Y Funcionamiento página 43

1. Place the pump horizontally on a firm surface. The screw
plug points upwards. WARNING! Risk of hands being
crushed. Ensure that the pump cannot fall over or slip
away!
2. Unscrew the screw plug.
3. Place a suitable tank to collect the operating fluid.
4. Drain the operating fluid: Rotate the pump until the
opening points downwards.
5. Check the operating fluid:
⇒ If the operating fluid is clear, reuse operating fluid.
⇒ If the operating fluid is contaminated (black), fill
with new operating fluid. Dispose of operating fluid
in accordance with the local regulations!
⇒ Notify customer service if an operating fluid con-
tains metal chips!
6. Pour in operating fluid: Rotate the pump until the open-
ing points upwards. Fill-in the operating fluid into the
opening.
⇒ Comply with the specifications for operating fluid
locations and quantity! When recycling the operat-
ing fluid, check the quantity and if required adjust it!
7. Clean the screw plug, replace the seal ring and screw it
back in. Max. tightening torque: 8 Nm (5.9 ft lb)!
6.4.4 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
Installation and operating instructions Wilo-Rexa UNI
Installation and electrical connection
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. 6: Wet well installation, stationary
1 Suspension unit
2 Non-return valve
3 Stop valve
4 Guide pipe (provided by the customer)
5 Lifting equipment
6 Attachment point for the 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!
‡
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.
en
5
6
S1
S2/S3
43