CA02B.C01
Service instructions, mixer type POPR-I
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Landia Inc.
Issued on: 12. mar. 2003
Cary, NC 27513
Rev. date: 22 november 2017
Executed by: AJ/BNV
Accepted by: SL/KT
OPERATION
The mixers have thermal sensors as standard equipment.
Often the mixers are exposed to extremely difficult operation conditions. Therefore, it is important to connect
the thermal control. Burning of the motor due to overheating can thus be avoided. If the safety function has been
activated the mixer must not be re-started until the cause of the circuit disconnect has been determined.
Among other things the disconnection can be caused by low mains voltage, a propeller blockage or an
overheated motor. The cooling period for overheated motors can be up to 1 hour.
THE UNIT MUST NOT OPERATE ABOVE LIQUID LEVEL
CAPACITY
The capacity of the mixer will always depend on the consistency of the medium, but especially on the design of
the tank.
INSPECTION
Regular inspection will ensure the mixer a long life at low costs. The oil must be changed every 6 months/4,300
hours of operation, however, min. once a year. Under difficult operation conditions more often than every 6
months.
At inspection the outer wear bushing must be checked for wear and replaced, if needed.
There are two different kinds of the outer wear bushing: a wear bushing made of stainless steel and a type
designed for extremely wearing mediums. This is a stainless steel wear bushing, covered with a ceramic
material. The ceramic coated type is characterized by its dark colour on the wearing surface.
With stainless steel wear bushing:
If the wear bushing has deep wear traces, the propeller must be removed.
A spacer can be mounted between the mechanical shaft seal and the propeller in order to move the wear area for
the exterior wear bushing. If it is impossible to move the wear area, either because it has been moved previously,
or the wear area is too wide, a new wear bushing must be installed.
With ceramic coated wear bushing:
Dismount the propeller and control if the surface is mat/porous. If this is the case the wear bushing is worn and
must be changed. It is very important to control the oil sealing ring for wear with this system.
The oil sealing ring (incl. of springs) must be controlled for wear and changed if necessary.
Mechanical shaft seal:
Dismount the propeller and make a visual control of the outer mechanical shaft seal. Remove rags, if any, and in
case the oil is dirty, dismount the seal and control it for wear.
