Landia POP-1, Руководство пользователя

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AA02B.C01
Service instruction POPR-I
Page 5/7
Executed by: AJ/CML Issued on: 12. March 2003
Accepted by: SL/KT Rev. date: 12 March 2021
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 installed between
the mechanical shaft seal and the propeller in order to move the wear area of the outer oil sealing ring. 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
Remove the propeller and check whether the surface of the wear bushing 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
Remove the propeller and make a visual control of the
outer mechanical shaft seal. Remove rags, if any, and in
case the oil is dirty, remove the seal and control it for
wear.
A. Grease nipple
B. Grease chamber
C. Wear bushing
D. Oil sealing ring
E. Mechanical shaft seal
F. Support disk (not shown)