CA02A.C01
Service instruction: POP-I
Side 4/8
Executed by: HL
Issued on: 11 December 2002
Accepted by: SL
Rev. date: 22 November 2017
Power Connection
Every mixer is equipped with the above mentioned rating plate with technical motor data. It must be verified that the
other electrical parts correspond to the motor data. For each mixer there is an electrical diagram. A protective motor
switch must be applied at connection of the mixer to the mains.
Only a certified electrician is allowed to connect the unit.
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, it must be changed 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 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
Remove 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 checked 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.
