Xylem LMN - Manual (Page 45)

Installation, Operating and Maintenance Instruction Model LM, LMN
LM ger/fr/eng Page 41 Revision 06
Article No 771073101 Issue 08/2013
3.3.2 General informations
The reuse of mech. seals that have already
been used for a longer time can lead to leaking
at the seal faces after reinstallation. Therefore
the replacement of the mech. seal with a new
one is recommended. The removed mechanical
seal can be reconditioned by the manufacturer
and serve as a replacement mech. seal.
3.3.3 Informations for the mounting
Pay attention to the utmost cleanness!
Especially the seal faces must be clean, dry and
undamaged. Don’t apply lubrication on the seal
faces of the mech. seal.
 If a lubricant is provided with the replacement
mech. seal, you should use this.
Use mineral grease or oil only if you are
completely sure that the elastomers of the
mech. seal are oil resistant. Use no silicone.
Use only lubricants with which you are certain
that no dangerous reaction can occur between
the lubricant and the pumped medium.
Have all required parts prepared so that
assembly can be completed quickly. The
lubricants are only effective for a short time.
After that, the axial mobility and thus the
automatic adjustment of the elastomers is lost.
Never push elastomers over sharp edges. If
necessary, use mounting devices.
During installation, push the mech. seals with a
bellows in such a way that the bellows is
compressed and not stretched (danger of
tearing apart!).
3.4 Bearings
The motor bearings also serve as pump bearings. The
bearings are greased for life and are thus
maintenance-free.
3.5 Condensation
For motors which are used at high temperature
differences and places with extreme climatic situations
with high humidity, we recommend to use a motor with
anti-condensation heater to prevent the unit of
condensation water inside the housing. During motor
run the anti-condensation heater must not be switched
on.
3.6 Approximate Value for Sound
Pressure Level
Nominal
power
P
N
in kW
Sound pressure level L
pA
in dB(A)
Pump alone Pump + Motor
2950
min
-1
1450
min
-1
2950
min
-1
1450
min
-1
0,55 50,5 49,5 58,0 52,0
0,75 52,0 51,0 59,0 54,0
1,1 54,0 53,0 60,0 55,5
1,5 55,5 55,0 63,5 57,0
2,2 58,0 57,0 64,5 59,0
3,0 59,5 58,5 68,5 61,0
4,0 61,0 60,0 69,0 63,0
5,5 63,0 62,0 70,0 65,0
7,5 64,5 63,5 70,5 67,0
11,0 66,5 65,5 72,0 69,0
15,0 68,0 67,0 72,5 70,0
18,5 69,0 68,5 73,0 70,5
22,0 70,5 69,5 74,5 71,0
30,0 72,0 71,0 75,0 72,0
37,0 73,0 76,0
45,0 74,0 77,0
55,0 75,5 78,0
Sound pressure level L
pA
measured in 1 m distance
from pump surface acc. to DIN 45635, part 1 and 24.
Room and foundation influences are not considered.
The tolerance for these values is
3 dB(A).
Addition with 60 Hz-operation:
Pump alone:

Pump with motor: +4 dB(A)
3.7 Permitted Nozzle Loads and Torques
at the Pump Nozzles ...
... following the Europump-Recommendation for
pump acc. to ISO 5199.
The data for forces and torques are only valid for static
piping loads.
All values for forces and torques refer to standard
materials 0.6020 (Type LMN) and/or 0.6025 (Type
LM).
pic. 1