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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
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)!
14
Installation and electrical connection
6.4.3
+/-
The pump is installed in the fluid for the wet well installation. For
this, a suspension unit must be installed in the chamber. On the
pressure side, the on-site pipe system is connected to the sus-
pension 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, observe 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 im-
mersed for at least 1 min.
Work steps
Fig. 5: Stationary wet well installation
1
2
3
4
5
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!
4
3
2
1
Suspension unit
Non-return valve
Stop valve
Guide pipe (provided by the customer)
Lifting equipment
5
6
S1
S2/S3
WILO SE 2019-02
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