Wilo Rexa UNI Series User Manual

Installation and electrical connection en-US
Installation and operating instructions Wilo-Rexa UNI 15
6.4.4 Stationary wet well installation
NOTICE
Delivery problems due to low water level
The hydraulics are self-venting. As a result, small air
cushions are dissolved during the pump process. If
the fluid is lowered too low, it can stop the volume
flow. The minimum permissible water level must
reach up to the upper edge of the hydraulics hous-
ing!
For wet well installation the pump is installed in the
fluid. For this purpose a suspension unit must be in-
stalled in the pump 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 con-
nected pipe system must be self-supporting. The sus-
pension unit must not support the pipe system!
CAUTION!If the motor emerges during operation,
adhere to the operating mode for non-immersed op-
eration (S2-15, S3 10%*)!
* If the required cooling of the motor is ensured before
a re-activation, the operating mode S3 25% is permis-
sible! To ensure the required cooling, the motor must
be completely immersed for at least 1minute!
Work steps
1
5
6
S1
S2/S3
3
4
2
Fig.6: Wet well installation, stationary
1 Guide system
2 Non-return valve
3 Stop valve
4 Guide pipes (to be provided by the customer)
5 Lifting equipment
6 Attachment point for lifting equipment
CAUTION
Damage to the pump due to improper instal-
lation
Observe the following points during pump installa-
tion:
• Adhere to the maximum permissible tightening
torque: 15Nm (V05) or 25Nm (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 permissible!
‡ Operating space/installation site is prepared for instal-
lation.
‡ Suspension unit and pipe system have been installed.
‡ Pump is prepared for operation on the suspension unit.
1. Attach lifting equipment to the attachment point of
the pump with a shackle.
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 sus-
pension unit and is automatically coupled. CAU-
TION!When lowering the pump, hold the power sup-
ply 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.
6.4.5 Portable wet well installation
WARNING
Danger of burning due to hot surfaces!
The motor housing can get hot during operation. It
can lead to burns. Allow the pump to cool down to
ambient temperature after switching off!

Wilo Rexa UNI Series Specifications

General

Brand	Wilo
Model	Rexa UNI Series
Category	Water Pump
Language	English