OPERATOR AND UNIT MAINTENANCE
REVERSE OSMOSIS WATER PURIFICATION UNIT FOR
INLAND AND COASTAL LARGE TUG (LT)
SERVICE UPON RECEIPT AND PREPARATION FOR STORAGE
One Watercraft Engineer, 88L
SERVICE UPON RECEIPT
The Reverse Osmosis Water Purification Units (ROWPU) are factory tested and rinsed with a mild mixture of
storage chemical. The chemical allows the system to be stored up to three months without any crew interaction.
Prior to use, conduct the Fresh Water Flush (FWF) procedure (WP 0005 00) to remove any chemicals in the
product water components and piping.
Operating the high pressure pumps at the incorrect oil level, and without vented oil caps
installed, will lead to pump failure.
Upon receipt of the ROWPU, the high pressure pumps must be serviced (WP 0017 00) prior to startup. The high
pressure pumps are not shipped with the vented oil caps installed. Operating the high pressure pumps at the
incorrect oil level, and without vented oil caps installed, will lead to pump failure.
Upon receipt, the ROWPU should be started, and the readings from the initial startup recorded on the ROWPU
system readings log (table 1), and retained for comparison with future readings. The ROWPU systems readings
log is provided for the operator's use so that trends in performance of the ROWPU may be documented and
The ROWPU pump motors must be kept dry to prevent damage to the units. The controller units and electrically
controlled components are mounted in AMS 2, out of the weather. However, they can still become wet during
compartment cleaning, or during service of other systems such as the fire and general service pumps. If there is
a possibility that the components or motors could become wet due to cleaning or equipment maintenance opera-
tions, cover them with waterproof tarps until cleaning or maintenance is complete.
PRELIMINARY SERVICING OF EQUIPMENT AND PRELIMINARY CHECKS AND ADJUSTMENTS OF EQUIP-
and including, the annual level.
PREPARATION FOR STORAGE
If the ROWPU will be stored longer than three months without use, it must be fresh water flushed (WP 0005 00)
and recharged with fresh storage solution every three months. An alternative to using the storage chemical
solution is conducting a weekly fresh water flush (WP 0005 00). Failure to conduct weekly fresh water flushes or
to recharge the ROWPU storage solution every three months can damage the reverse osmosis membrane