Maintenance and repair
en
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40
71
9.4.2
Maintenance intervals for harsh
conditions
Under the following operating conditions, shorten the specified maintenance intervals
in consultation with the customer service:
ƒ
Fluids with long-fibre components
ƒ
Highly corrosive or abrasive fluid
ƒ
Strongly gassing fluids
ƒ
Operation at an unfavourable duty point
ƒ
Unfavourable flow conditions (e.g. due to fixtures or aeration)
If there are harsh operating conditions, it is recommended to conclude a maintenance
contract.
9.5
Maintenance measures
WARNING
Risk of injury from sharp edges!
Sharp edges can form on the propeller blades. There is a danger of cuts and similar
injuries!
• Wear protective gloves!
Before starting maintenance work, meet the following requirements:
ƒ
Wear protective equipment! Observe the work regulations.
–
Safety shoes: Protection class S1 (uvex 1 sport S1)
–
Protective gloves: 4X42C (uvex C500)
–
Safety goggles: uvex skyguard NT
For detailed marking of frame and disc, see the section on “Personal protective
equipment [
}
46]”.
ƒ
The mixer has been thoroughly cleaned and disinfected.
ƒ
Motor must have cooled down to the ambient temperature.
ƒ
Workplace:
–
Clean, good lighting and ventilation.
–
Firm and stable work surface.
–
Secured against falling over and slipping.
CAUTION! Do not set the mixer down on the propeller! Provide an appropriate plat-
form.
NOTICE! Only perform the maintenance work described in these installation and op-
erating instructions.
9.5.1
Recommended maintenance
measures
Regular inspection of current consumption and the operating voltage in all three phases
is recommended for smooth operation. In normal operation, these values remain con-
stant. Slight fluctuations depend on the characteristics of the fluid.
Current consumption can provide an early indication of damage to or malfunctions in
the mixer, which can then be rectified. Larger voltage fluctuations strain the motor
winding and can cause breakdown. Regular inspections can therefore largely prevent
major secondary damage and reduce the risk of total breakdown. In this regard, it is re-
commended to use remote monitoring for regular inspections.
9.5.2
Rotating the propeller
‡
Protective equipment used!
‡
Mixer disconnected from mains.
1. Place mixer on a firm work surface in a horizontal position.
CAUTION! Do not place the mixer on the propeller! Use an appropriate platform
for the propeller diameter.
2. Secure the mixer against falling over or slipping!
3. Grip the propeller carefully and rotate the propeller.
