English
Installation and maintenance instructions Wilo-Horizontal pumps
NP
G
recommendations are to be followed.
5.8.1 Cleaning prior to operation
Pumps that are to be used for a food or drinking
water application should be cleaned before being
put into initial operation and after the installation
of spare parts that are in contact with the liquid.
Cleaning once the pump has been commissioned
will depend on the application and operating con-
ditions. The user must ensure that the cleaning
procedures are suitable for the application and
operating conditions, and local regulations.
6 Maintenance
6.1
General
It is the plant operator's responsibility to ensure
that all maintenance, inspection and assembly
work is carried out by authorized and qualified
personnel who have adequately familiarized
themselves with the subject matter by studying
this manual in detail (see also section 1.6.2.).
Any work on the machine must be performed
when it is at a standstill. It is imperative that the
procedure for shutting down the machine is follo-
wed, as described in section 5.6.
On completion of work all guards and safety
devices must be re-installed and made operative
again.
Before restarting the machine, the relevant
instructions listed in section 5, Commissioning,
start up, operation and shut down must be obser-
ved.
Oil and grease leaks may make the ground slip-
pery. Machine maintenance must always begin
and finish by cleaning the ground and the exte-
rior of the machine.
Before working on the pump, take measures to
prevent an uncontrolled start. Put a warning board
on the starting device with the words:
"Machine under repair: do not start".
With electric drive equipment, lock the main
switch open and withdraw any fuses. Put a war-
ning board on the fuse box or main switch with the
words:
"Machine under repair: do not connect".
Never clean equipment with inflammable solvents
or carbon tetrachloride. Protect yourself against
toxic fumes when using cleaning agents.
6.2
Maintenance schedule
6.2.1 Standard maintenance
Roller bearing
6.2.1.1 For NP
G
150-200, 200-315, 200-355, 250-250,
250-315, 300-300, 65-315A, 100-315A
The bearing housings are provided with sealed for
life ball bearings. No maintenance is required.
6.2.1.2 For other NP
G
The bearings fitted are prepacked with grease at
the factory. When the regressing period is reached
it is necessary to remove as much of the old grease
as possible with a clean lint free cloth and repack
the bearings with fresh grease.
The grease used in factory for first filling is:
SHELL ALVANIA R2
Its equivalents:
• MOBIL: Mobilux EP 2,
• TOTAL: Multis 2,
• ELF: ELF MULTI
Lubrication in hours frequency* of operation
Added quantity in cm
3
Pump type
Coupling side
Pump side
Coupling side
Pump side
NP
G
150 - 500
4 000
4 000
30
30
NP
G
200 - 250
6 000
6 000
15
15
NP
G
200 - 400
8 000
8 000
25
25
NP
G
200 - 500
4 000
4 000
30
30
NP
G
250 - 355
8 000
8 000
25
25
NP
G
250 - 400
8 000
8 000
25
25
NP
G
250 - 500
4 000
4 000
30
30
NP
G
300 - 400
8 000
8 000
25
25
NP
G
300 - 450
4 000
4 000
30
30
NP
G
300 - 500
3 500
3 500
50
50
NP
G
350 - 350
4 000
4 000
40
40
NP
G
400 - 500
3 500
3 500
50
50
NP
G
400 - 650
3 500
3 500
50
50
NP
G
500 - 500
3 500
3 500
50
50
*At least once a year
