Village LW-160, User Manual And Reference Manual

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MAINTENANCE
14
VMT - v. JUNE 2008
5.0 MAINTENANCE
The service life of most system equipment is related to the sea water inlet conditions and proper maintenance. Under
normal conditions, a reverse osmosis membrane (which is the major consumable item) should have an effective
service life somewhere between 3 and 6 years.
NOTE: The RO unit must be cleaned when product water output drops by 15%.
Tablee 5.0: Maintenance Task Chart.
* VMT prefilter cartridges can be rinsed with freshwater and be reused up to 3 times.
**
Change pump oil after first 50 hours of RO use. After the first oil change at 50 hours, change the
pump oil every 500 hours thereafter or once annually which ever interval comes first.
FRESHWATER FLUSH / SHORT TERM STORAGE
Ideally, the Little Wonder performs optimally when the RO unit is used regularly. The likelihood of
bacterial and biological growth in the membranes increases when stagnant seawater (in extended
periods) is in contact with the membranes. A freshwater flush procedure is necessary to prevent
clogging and growth of organic contaminants in the RO system and its membranes. The flush pushes
out older stagnant seawater (saltwater) out of the membranes and replacing it with freshwater, leaving
less chance of fouling the membranes. The freshwater flush procedure should be used when the unit
will be placed idle or in “stand by” condition for more than one day. Although they do not attack the
membranes or other system components directly, high concentrations of biological matter can block
enough of the product water channels to cause a reduction of as much as 40% of the total system
capacity.
PERFORM A FRESHWATER FLUSH TO THE RO UNIT WITH NON-CHLORINATED FRESH WATER
ONLY. THE FRESHWATER FLUSH SYSTEM USES A CARBON FILTER INLINE BEFORE SYSTEM
TO REMOVE CHLORINE THAT MAY BE PRESENT IN DOCK WATER SUPPLIES.
Daily
Weekly
Monthly
Quarter
ly
Semi
-Annually
Annually
As Required Labor Hours
(approximate)
Check Belt Tension/Wear
•
0.5
Clean/inspect micron prefilter
•
0.5
Replace five micron filter
•
0.5
Replace Carbon Flush Filter
•
0.5
Clean membranes
•
2.0
Replace Membranes
•
1.0
Check pump oil level
•
0.1
Change pump oil
** •
0.5