TM 55-1925-282-14&P
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LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
1. ROWPU System 24 Vdc Battery Charger/Power Supply (figure 1, item 1). The battery charger/power supply
provides 24 Vdc to recharge the battery bank, and it provides 24 Vdc during normal ROWPU operation.
2. 24 Vdc Battery Bank (figure 1, item 2). Stand-alone battery bank that provides power to the ROWPU system
during layup periods. The battery bank is capable of providing power to maintain fresh water flush cycles for
up to 90 days without being recharged.
3. High Pressure Pumps (figure 1, item 3). The high pressure pumps provide filtered high pressure raw water
to the RO membrane elements.
4. Fresh Water Flush Pump (figure 1, item 4). The fresh water flush pump (located beneath the high pressure
pumps) provides the fresh water needed for flushing the ROWPU system during maintenance and layup
periods.
5. Charcoal Filters (figure 1, item 5). The charcoal filters remove sediment and odors from the fresh water used
during flushing cycles. The charcoal filters also block bromine and chlorine from passing into the reverse
osmosis membranes.
6. Flow Control Panels (figure 1, item 6). The flow control panels provide the operator with the indicators
needed to monitor the quantity and quality of product water, and the means to control overall system pres-
sure.
7. System Controllers (figure 1, item 7). The system controllers monitor and control all processes accom-
plished by the ROWPU system.
8. Media Filter (figure 1, item 8). The media filter removes suspended particles 30-micron and larger from the
raw water. This provides protection and longer life to the 20-micron filter element.
9. 20-Micron Filters (figure 1, item 9). The 20-micron filters remove suspended particles 20-micron and larger
from the raw water. This provides protection and longer life to the 5-micron filter element.
10. 5-Micron Filters (figure 1, item 10). The 5-micron filters remove suspended particles 5-micron and larger
from the raw water. This provides protection and longer life to the high pressure pumps and RO membranes.
11. Reverse Osmosis (RO) Membrane Elements (figure 1, item 11). The RO membranes convert high pressure
raw water into potable drinking water.
12. ROWPU System 24 Vdc Control Panel (figure 1, item 12). The 24 Vdc Control Panel (located beneath the
high pressure pumps) provides the operator with a means of locally monitoring and securing 24 Vdc to the
ROWPU. The battery will still maintain a charge even if these breakers are OFF. This switch must remain
ON in order for the ROWPU system controllers to monitor the system and conduct fresh water flushes during
layup periods.
13. ROWPU 24 Vdc Fuse Box (figure 1, item 13). The fuse box provides 24 Vdc circuit protection to the ROWPU
system in the event of a casualty or damage to the ROWPU system 24 Vdc battery charger/power supply or
the 24 Vdc battery bank.
DIFFERENCES BETWEEN MODELS
At the time of issue for this manual, only hull number LT-803 had been outfitted with the ROWPU system up-
grade. Therefore, no differences between models currently exist. As other vessels are upgraded, this manual
will be revised to reflect those installations, and the differences between models will be identified at that time.
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