Maintenance Tasks - Wilo Rexa CUT GI Instrucciones De Instalación Y Funcionamiento

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Fig. 3: Minimum distances
d Diameter hydraulics housing
Minimum distance from the wall:
A - alternating operation: min. 0.3 × d
1
- parallel operation: min. 1 × d
Distance to pressure pipes
A - alternating operation: min. 1.5 × d
2
- parallel operation: min. 2 × d
6.4.2

Maintenance tasks

After a storage period of more than 6 months, check the
oil in the sealing chamber prior to installation:
Fig. 4: Check the oil
+/ Screw plug sealing chamber
-
‡
Pump is not installed.
‡
Pump is not connected to the mains.
‡
Protective equipment has been put on!
1. Place the pump horizontally on a firm surface. The screw
plug points upwards. WARNING! Risk of hands being
100
Installation and electrical connection
6.4.3
+/-
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)!
Stationary wet well installation
NOTICE
Pumping problems due to water level being
too low
If the fluid is lowered too much, separation of the
volume flow may occur. Furthermore, air cushions
may form in the hydraulic system, resulting in un-
desirable behaviour during operation. 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.
WILO SE 2019-02