Shut-Down Procedure; Periods Of Inactivity; Preservation Of Pulleys And Belts; Startup After A Period Of Inactivity - Grundfos BME Montage- Und Betriebsanleitung

18. Shut-down procedure

See section

19. Periods of inactivity

when shutting down the system. These precautions must be
taken to protect the system and ensure long life of all the system
components.
Procedure
See fig. 11 or 12.
1. Stop the BME pump (high-pressure pump).
2. Wait for 5 seconds to ensure water supply while the BME
pump is being shut down.
3. Stop the feed pump.
19. Periods of inactivity
In the case of periods of inactivity, various precautions must be
taken to protect the system.
The precautions to be taken if the system is to be inactive for a
certain period appear in the table:
Action
Flushing. See section

19.4 Flushing of the modules

Fill the modules with fresh water
Preserve the pump*
Slacken and remove the V-belts.
Preserve the pulleys against
corrosion. See section
19.1 Preservation of pulleys and
belts
Rotate pump and motor shafts
manually once a month
* Use the same solution that is used to preserve the
membranes.
The normal stop procedure must be followed
Caution
step by step.

19.1 Preservation of pulleys and belts

When the belts have been removed, lubricate the pulleys with an
anti-corrosive lubricating oil.
The belts must be kept at a temperature not exceeding 30 °C and
at a relative air humidity not exceeding 70 %.
The belts must not be exposed to direct sunlight.

19.2 Startup after a period of inactivity

The precautions to be taken if the system has been inactive for a
certain period appear in the table:
Action
Remove preservative from the pulleys.
See section 19.3 Removal of
preservative before restarting
Check the V-belts
Mount the V-belts and adjust the tension
according to the values in section
15. Recommended V-belt tension
The normal startup procedure must be followed
Caution
step by step. For greasing of motor bearings, see
section 17. Motor
for precautions to be taken
x x x x
x x x x
x x x
x x x
x x
x x x
x x x
x x x
bearings.

19.3 Removal of preservative before restarting

Before restarting the system, remove the preservative with a
suitable solvent. The pulleys must be completely free from oil
before the belt is refitted.
19.4 Flushing of the modules
The booster pumps must be stopped while the system is flushed.
The booster modules can be flushed through in or against the
flow direction. See fig. 20 or 21.
Flush the system through with fresh water for approx. 10 minutes
or until the salinity is below 500 ppm. The pressure during
flushing must be minimum 2 bar. The flushing must be continued
until the modules are completely filled with clean fresh water.
If the flushing takes more than 10 minutes, the
Caution
flow must be reduced to maximum 10 % of the
rated flow.
The booster modules must be filled with clean
Caution
fresh water during periods of inactivity.
To flush the pulley head of the BME pump, start
Caution
the pump for 30 seconds to allow the fresh water
to enter into the pulley head.
The distributing pipe for nozzles must also be
Caution
flushed through.
Fig. 20 BME booster module - flow direction when flushing
Fig. 21 BMET booster module - flow direction when flushing

20. Frequency of starts and stops

Minimum 1 per year is recommended.
Maximum 5 per hour.
Maximum 20 per day.
15