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Fig. 3: Minimum distances
6.4.2
Maintenance tasks
Fig. 4: Check the oil
6.4.3
Stationary wet well installation
142
Installation and electrical connection
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
After a storage period of more than 6 months, check the oil in the sealing chamber prior
to installation:
+/-
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. Dis-
pose of operating fluid in accordance with the local regulations!
⇒ Notify customer service if an operating fluid contains metal chips!
6. Pour in operating fluid: Rotate the pump until the opening points upwards. Fill-in
the operating fluid into the opening.
⇒ Comply with the specifications for operating fluid locations and quantity!
When recycling the operating 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)!
NOTICE
Pumping problems due to water level being too low
If the fluid is lowered too much, separation of the volume flow may occur. Further-
more, air cushions may form in the hydraulic system, resulting in undesirable beha-
viour 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 installation. For this, a suspension unit
must be installed in the chamber. On the pressure side, the on-site pipe system is con-
nected 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 sys-
tem!
WILO SE 2019-02
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