General Overhaul; Faults, Causes And Remedies - Wilo Padus UNI Einbau- Und Betriebsanleitung

en
clearance between the impeller and suction port can be
adjusted to compensate for impeller wear.
3
1
2
Fig. 9: Adjusting the impeller clearance (strainer removed)
1 Safety screws for fixing the clearance adjustment
2 Clearance adjustment
3 Dial
4 Pointer (▲)
+ Increase clearance
- Decrease clearance
‡
Strainer removed. See "Cleaning the strainer [} 47]"
‡
Baseplate cleaned. The dial and pointer are discernible.
1. Loosen the safety screws until the clearance adjustment
can be turned. NOTICE! Do not completely unscrew the
screws!
2. Turn the clearance adjustment anti-clockwise (-) until
the counterplate rests against the impeller.
3. Increase the clearance by 3 division marks: Turn the
clearance adjustment clockwise (+). Observe the pointer
when setting!
4. Tighten the safety screws. Max. tightening torque:
4 Nm (3 ft·lb)!
▶ Impeller clearance corrected. Refit the strainer.
9.5.7

General overhaul

During the general overhaul, the motor bearings, shaft
sealings, O-rings and power supply cables are checked
for wear and damage. Damaged components are re-
placed with original parts. This will ensure correct opera-
tion.
The general overhaul is performed by the manufacturer
or an authorised service centre.
50
1
4
- +
1

Faults, causes and remedies

10 Faults, causes and remedies
DANGER
Danger due to fluids hazardous to health!
Danger of death in case of pumps with fluids hazard-
ous to health! Wear the following protective equip-
ment while performing the work:
• Closed safety goggles
• Breathing mask
• Protective gloves
⇒ The equipment listed here is the minimum re-
quirement, observe the specifications of the
work regulations! The operator must make sure
that the personnel have received and read the
work regulations!
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
DANGER
Risk of fatal injury due to dangerous lone
working practices!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A second
person must be present for safety reasons.
WARNING
No persons are allowed to be present inside
the working area of the pump!
Persons may suffer (serious) injuries while the pump is
in operation! No persons may therefore be present in-
side the working area. If persons must enter the
working area of the pump, the pump must be decom-
missioned and secured against being switched on
again without authorisation.
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction
port. There is danger of limbs being severed! Protect-
ive gloves must be worn to protect from cuts.
WILO SE 2019-02