Maintenance and repair
en
Installation and operating instructions Wilo-Vardo WEEDLESS-F
33
9.6.3
Replacing the cover cap and pro-
peller blades
DANGER
Danger due to fluids hazardous to health during installation!
Ensure that the installation site is clean and disinfected during installation. If contact
with fluids that are hazardous to health is possible, observe the following points:
• Wear protective equipment:
⇒ Closed safety goggles
⇒ Mouth protection
⇒ Protective gloves
• Immediately wipe up drips.
• Observe the specifications provided by work regulations! The operator must
make sure that personnel have received and read work regulations!
NOTICE
Work steps for dismantling
The individual components are dismantled in reverse order to assembly.
Propeller blade replacement is performed with the mixer installed. Observe the follow-
ing points:
ƒ
Prepare the operating space/installation site:
–
Clean, free of coarse solids
–
Dry
–
Frost-free
–
Decontaminated
ƒ
Work must always be carried out by two persons.
ƒ
Avoid any painful or tiring body postures.
ƒ
When working at a height of more than 1 m (3 ft) above the ground, use scaffolding
with a safety harness.
ƒ
Cordon off the working area around the scaffolding.
ƒ
Toxic or asphyxiating gases may build up when working in closed rooms. Ensure
there is sufficient ventilation and observe protective measures according to work
regulations (examples):
–
Measure the gas concentration before entering.
–
Carry a gas detector with you.
–
etc.
ƒ
Take immediate countermeasures if there is a build-up of toxic or asphyxiating
gases.
ƒ
To remove/install the cover cap, see “Mounting the cover cap [
}
21]”.
ƒ
To remove/install the propeller blades, see “Attaching the propeller blades [
}
18]”.
ƒ
Inspect the individual propeller blades for wear. Replace all propeller blades if neces-
sary. Consult customer service!
ƒ
Note the setting angle. A different angle changes the flow behaviour.
