Table 2-1. Preventive Maintenance Checks and Services
Items to be
D W M Q S AR Inspected/Serviced
RO Element - continued
Turn off the RO unit.
Prepare package #2 (citric acid) from the
cleaning kit into a mixing bottle and mix
thoroughly with unchlorinated product water.
Add this solution to the RO unit as before.
Turn on the main power switch and recirculate
for 50 minutes, as with solution #1.
After 50 minutes, turn the cleaning valve to
the operational mode to divert the chemical
solution to drain.
aa. Turn off the RO unit.
bb. Reinstall the micron filter cartridges.
cc. Restart the RO unit and flush the system for
20 minutes with no back pressure.
dd. After 20 minutes, close the high pressure
bypass valve to bring the system pressure
back up to 800 psi and run for 5 minutes;
then, switch the power switch on the water
quality monitor to the ON position to resume
potable water production.
High Pressure Pump Motor Lubricate: refer to LO 55-1905-223-12.
Check product water. Refer to paragraph 2-29.
From the watermaker log, select a flow rate
representing normal flow, about 100 hours
after last cleaning of the pressure vessel
seawater element (membrane). Note the
temperature at which this flow was recorded.