TM 55-1925-282-14&P
OPERATOR MAINTENANCE
REVERSE OSMOSIS WATER PURIFICATION UNIT FOR
INLAND AND COASTAL LARGE TUG (LT)
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INCLUDING LUBRICATION
ITEM INTERVAL
MAN-
ITEM TO BE
PROCEDURE
EQUIPMENT
NO.
HOUR
CHECKED OR
NOT READY/
SERVICED
AVAILABLE IF:
1
Before
0.5
Media Filter
Backflush and rinse media as required
to prevent differential pressure from
exceeding 20 PSI (1.4 bar)
2
Before
0.2
5-Micron Filter
Verify that the filter housing is clean,
and replace the filter element if the
pressure differential across the filter
is greater than 10 PSI (0.7 bar)
3
Before
0.2
20-Micron Filter
Verify that the filter housing is clean,
and replace the filter element if the
pressure differential across the filter
is greater than 10 PSI (0.7 bar)
4
During
0.5
Media Filter
Backflush and rinse media as required
to prevent differential pressure from
exceeding 20 PSI (1.4 bar)
5
During
2.0
Reverse Osmosis
Clean RO membrane elements when
(RO) Membranes
production of product water decreases
by 10% or when salinity meter readings
indicate product water produced
contains more than 300 ppm salt
0012 00-1