Stationary Wet Well Installation - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

6.4.3

Stationary wet well installation

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Fig. 5: Wet well installation, stationary
Installation and operating instructions Wilo-Rexa PRO
Installation and electrical connection
⇒ If there are metal filings in the operating fluid, inform customer service!
6. Pour in operating fluid: Rotate the pump until the hole points upwards. Pour operating
fluid into the hole.
⇒ Adhere to the information for operating fluid type and quantity! When re-using
operating fluid, the quantity must also be checked and adjusted, if necessary!
7. Clean the screw plug, replace the seal ring, and screw it back in. Max. tightening
torque: 8 Nm (5.9 ft lb)!
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 per-
missible water level must reach up to the upper edge of the hydraulics housing!
For wet well installation the pump is installed in the fluid. For this purpose a guide system
must be installed in the pump chamber. On the pressure side, the on-site pipe system is
connected to the guide system and on the suction side to the pump. The connected pipe
system must be self-supporting. The guide system must not support the pipe system!
Note for non-immersed operation
▪ P 13 motor: The motor can be run non-immersed in "non-immersed" operating mode (S1,
S2-30, S3 25 %*).
▪ P 17 motor: Running the motor non-immersed is not permitted!
* If the required cooling of the motor is ensured before a re-activation, the operating mode
S3 50 % is permissible! To ensure the required cooling, the motor must be completely im-
mersed for at least 1 minute!
Work steps
1 Guide system
2 Non-return valve
3 Stop valve
4 Guide pipes (to be provided by the customer)
5 Lifting equipment
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6 Attachment point for lifting equipment
S* Non-immersed operating mode: Observe the information on the rating plate!
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6 Operating space/installation site is prepared for installation.
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Guide system and pipe system have been installed.
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Pump is prepared for operation on the guide system.
S1
1. Attach lifting equipment to the attachment point of the pump with a shackle.
S*
2. Raise pump, guide over the pump chamber opening and slowly lower the guide claws
onto the guide pipes.
3. Lower the pump until the pump is mounted on the guide system and is automatically
coupled. CAUTION! When lowering the pump, hold the power supply cables slightly
taut!
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.
▶ Pump is installed, the qualified electrician can carry out the electrical connection.
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