Installation, Operating and Maintenance Instruction
Model LSN
LSN 100-english
page 13
Revision 00
Article No 4264611
Issue
05/2003
Be particularly careful not to touch hot machine
parts and when working in the unprotected shaft
seal area. Remember that automatically
controlled systems may switch themselves on
suddenly at any time. Suitable warning signs
should be affixed.
6.4 Limits of Operation
The operating limits of the pump / unit regarding
pressure, temperature, performance and speed
are shown in the data sheet and / or order
confirmation and must be observed under any
circumstances!
Do not exceed the output given on the motor
name plate.
Avoid
sudden
changes
in
temperature
(temperature shocks).
The pump and motor should run evenly and
without vibrations; check at least once a week.
6.4.1 Flow min. / max.
If no other data are given in the curves or data sheets,
the following is valid:
Q
min
= 0,1 x Q
BEP
for for short time operation
Q
min
= 0,3 x Q
BEP
for continuous operation
Q
max
= 1,2 x Q
BEP
for continuous operation *)
Q
BEP
= Flow in efficiency optimum
*) on condition that NPSH
facility
> (NPSH
pump
+ 0,5 m)
6.4.2 Abrasive Media
On pumping liquids with abrasive components
an increased wear at hydraulic and shaft sealing
must be expected. The intervals of inspection
should be reduced compared to the usual
times.
6.4.3 Permitted number of starts
The permitted number of starts of the pump must not
be exceeded, see diagram 6.
1,0
10,0
100,0
1
10
100
1000
Motor power [kW]
m
a
x
.
p
e
rm
.
s
ta
rt
s
/h
diagram 6
With electric motors, the permitted number of starts is
given in the attached motor operating instructions.
If two different figures are given, the lower figure is
valid.
6.5 Lubrication of Bearings
6.5.1 Oil lubrication
The bearing bracket must be filled up with oil.
For quality of oil refer to chapter 7.4.1.
For qantity of oil refer to chapter 7.4.1.
The pumps are delivered without oil filling!
Oil level sight glass (standard design)
Remove oil filling plug (637) and fill oil
into the connection opening (GF1).
Fill in oil up to the middle of the oil level
sight glass (642) (pic 7). Keep level
exactly. Overfilling leads to increased
bearing temperature and possibly oil
leakage. If oil level is too low this can
cause shortcoming of lubrication.
pic 7
Constant level oiler (special design)
Supplied loose.
Unscrew the reservoir from the main body (right
threaded) and set aside.
Seal the main body into the bearing bracket (330),
through a PTFE sealing tape, at connection for
constant level oiler (638). Tighten until threaded
boss is in vertical position (picture 8).
Remove the oil filling plug (637) (upper side of
bearing bracket) and fill in oil through the
connection opening (GF1), until the oil level
reaches almost the middle of the oil level sight
glass in the main body.
Using a funnel, fill the reservoir (picture 8).
Make sure that o-ring is on reservoir spout.
Place thumb over reservoir spout, invert, and
insert the spout into the internal threaded boss on
the main body. Tighten reservoir (picture 8).
Now the oil is flowing from the reservoir into the
bearing chamber.
Repeat filling till the reservoir stays full to 2/3
rd
.
Refill oil as soon as the oil level falls below 1/3
rd
.
pic 8
6.5.2 Grease lubrication
For quality of grease refer to chapter 7.4.2.
For quantity of grease refer to chapter 7.4.2.
The bearings are already filled with lithium based
grease at the factory and are thus ready for use.
The grease provided is suitable for a temperature
range from -30° to +90°C (measured at surface of
bearing bracket).
