19
CARE AND MAINTENANCE
Safety precautions
Before starting work on the machine,
make sure that the machine is isolat-
ed from the power supply and can-
notbe energized.
This applies to the control circuit as
well.
To prevent injury watch out for damaged and worn
parts.
NOTE! This applies to the control circuit as well.
The following points are important in connection with
work on the machine:
— make sure that the machine has been thoroughly
cleaned.
— observe good personal hygiene.
— beware of risk of infection.
— follow local safety regulations.
The mixer is designed for use in liquids which can be
hazardous to health. In order to prevent injury to the
eyes and skin, observe the following points when
working on the machine:
— Always wear goggles and rubber gloves.
— Rinse the mixer thoroughly with clean water before
starting work.
— Rinse the components in water after disassembly.
— Hold a rag over the oil casing screw (124) when
removing it. Otherwise, pressure that may have
built up in the mixer due to leakage of liquid into the
mixer may cause splatter into the eyes or onto the
skin.
Proceed as follows if you get hazardous chemicals
in your eyes:
— rinse immediately in running water for 15 minutes.
Hold your eyelids apart with your fingers.
— contact an eye doctor.
on your skin:
— remove contaminated clothes.
— wash skin with soap and water.
— seek medical attention if required.
Make sure that the machine (or parts
of the machine) can't roll or fall over
and damage people or property.
In some installations the machine
surface and the surrounding liquid
may be hot. Bear in mind the risk of
burn injures.
Ex-version!
All work on the explosion-proof
motor section must be performed
by personnel authorized by Flygt.
Service
Major overhaul of the mixer should be made in a ser-
vice workshop.
Tendency to clog can easily be observed by means of
an amperemeter.
NOTE! Check the propeller. If the propeller is hard
worn to uneven leading edge, the motor can be over-
loaded, because of clogging.
Inspection
Inspection involves that following will be checked and
measured if required;
— replacement of all worn components.
— check all screw connections.
— check quantity and condition of the oil.
— check if there is liquid in the stator casing.
— check the cable entry and condition of the cable.
— functional check of the start equipment.
— functional check of monitoring equipment.
— check of direction of rotation.
— check the lifting device and guide bars (clearance
and wear).
— check of electrical insulation.
— replace all O-rings which are removed for inspec-
tion.
— check and rinse the space around the seals. See
also “Recommended inspection”
Inspections and service intervals
Regular inspection and preventive maintenance en-
sure more reliable operation. The maintenance sched-
ule below gives the recommended period of time when
the machine should pass inspection and major overhaul.
The maintenance schedule is divided into two groups
A and B depending on wearing and temperature.
Group Wearing/Temperature Inspection Major
overhaul
A • None or moderate/ Every 8000 Once every
40°C (104°F) hours or five years
once a or every
year 50 000 hours
B • None or moderate/ Every 4000 Once every
40°C - 90°C hours or two years or
(104°F-194°F) twice a every 20 000
• Heavy 40°C (104°F) year hours or when
• Csb inner seal inspect.
indicates.
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