Wilo NPG Series Installation And Operating Instructions Manual page 16

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.
Lubrication in hours frequency* of operation
Pump type
NPG 150 - 500
NPG 200 - 250
NPG 200 - 400
NPG 200 - 500
NPG 250 - 355
NPG 250 - 400
NPG 250 - 500
NPG 300 - 400
NPG 300 - 450
NPG 300 - 500
NPG 350 - 350
NPG 400 - 500
NPG 400 - 650
NPG 500 - 500
*At least once a year
The grease used in factory for first filling is:
SHELL ALVANIA R2
Its equivalents:
• MOBIL: Mobilux EP 2,
• TOTAL: Multis 2,
• ELF: ELF MULTI
Installation and maintenance instructions Wilo-Horizontal pumps
Coupling side Pump side
4 000
6 000
8 000
4 000
8 000
8 000
4 000
8 000
4 000
3 500
4 000
3 500
3 500
3 500
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 NPG 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 NPG
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.
Added quantity in cm
Coupling side
4 000 30
6 000 15
8 000 25
4 000 30
8 000 25
8 000 25
4 000 30
8 000 25
4 000 30
3 500 50
4 000 40
3 500 50
3 500 50
3 500 50
NPG
English
3
Pump side
30
15
25
30
25
25
30
25
30
50
40
50
50
50