en
Operation
22
WILO SE 2020-05
⇒ Carry out at least two complete pumping procedures of all pumps when con-
ducting a test run.
⇒ Fill the pressure pipe completely with water to check the duty point. Repeat
the test run until the pressure pipe is completely full.
7. Screw the maintenance cover back on.
NOTICE! Tightly seal the inspection open-
ing on the collection reservoir!
8. Check all connections for impermeability.
⇒ If all connections are leak-proof, the lifting unit can run in automatic mode.
▶ Test run completed.
▶ Lifting unit
is put into operation
: Keep gate valve open in the
pressure pipe
.
▶ Lifting unit
in standby mode
: Close the gate valve in the
pressure pipe
.
7.5
Follow-up time
The follow-up time is pre-set at the factory to 3 seconds. The follow-up time can be
adjusted as required:
ƒ
Increasing the usable volume per pumping process.
ƒ
Extensive suction of settling sediments on base of tank through integrated depth
suction.
ƒ
Slurping operation for avoiding pressure surges.
To set the follow-up time, read the installation and operating instructions for the
switchgear!
CAUTION! Pay attention to the operating mode if the follow-up time is changed.
The operating mode indicates the activation period and the downtime!
7.6
Setting for venting screw
The swing check valve is equipped with a venting screw. The swing check valve can be
opened via the venting screw for inspection work. As a result, the remaining fluid can
flow back into the collection reservoir from the pressure pipe. You should then restore
the factory setting of the venting screw to ensure proper operation of the swing check
valve.
3
4
9
28
Fig. 8:
Position of the venting screw
3
Ventilation connection
4
Pressure connection
9
Venting screw
‡
Lifting unit in standby mode.
1. Check factory setting of the venting screw: 28 mm (1.1 in)
2. Unscrew the venting screw if it is screwed in too far (>28 mm/1.1 in).
CAUTION! If the venting screw is screwed in too far, this can cause damage to the
swing check valve. This can also lead to loud noises being produced!
8
Operation
The lifting unit operates in automatic mode by default and is switched on and off using
the integrated level control device.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It may cause burns. Allow the mo-
tor to cool down at ambient temperature after switching it off!
‡
Commissioning has been carried out.
‡
Test run has been completed successfully.
‡
The operation and functioning of the lifting unit are known.
