2-9. OPERATING PROCEDURES - cont.
Set SODIUM HEX RUN/PRIME valve to RUN position (figure 2-60).
Figure 2-60. RUN/PRIME Valves.
Check that the VENT PRODUCT WATER valve (7, figure 2-46) is in the open position. The vent
product water valve allows air to escape from the product water line
Check that the REGULATE PRODUCT flow valve (4, figure 2-61) is fully open.
Slowly close VENT VESSELS gate valve (5). This allows filtered water to enter R.O. vessels.
To prevent damage to the R.O. elements, closely observe R.O. PRESSURE PSI gauge when adjusting
REGULATE PRODUCT FLOW valve. R.O. pressure will increase very rapidly toward end of adjustment
Slowly adjust REGULATE PRODUCT FLOW valve (4) to the right (clockwise). Watch for an increase
in PRODUCT WATER FLOW gauge (3), a decreased flow in BRINE FLOW gauge (1), and increased
pressure in the R.O. PRESSURE PSI gauge (2).
PRODUCT WATER FLOW should not exceed 12 gpm for seawater conditions or 16 gpm for fresh or
brackish water. R.O. PRESSURE PSI gauge should not exceed 960 psi (seawater), 500 psi (fresh or
brackish water). If gauge readings exceed these limits, refer to Section II, Chapter 3, Troubleshooting.
Close REGULATE PRODUCT FLOW valve (4) very slowly. Watch gauges until you obtain proper
balance shown in table 2-3.