The setting of 60 or 20 ml/min set earlier was only to prevent overdosing of
polymer. This rate may be adjusted during operation to improve clarity.
(8) Run ROWPU for 5 minutes, and repeat steps (4) and (5). If both bullseye and black disc can
be seen clearly, proceed to step r; if not, proceed to step (9).
(9) Increase control knob setting by 0.5.
(10) Repeat steps (8) and (9) until water is clear.
Unless source water is noticeably turbid, it should not be necessary to increase
POLYMER setting beyond 2.5.
Figure 2-60. Nameplates
Set SODIUM HEX valve to RUN position (fig. 2-10).
Check that the vent product water valve (fig. 2-6) is in the OPEN position. The vent product water
valve allows air to escape from the product water line and lowers product water pressure. it should be closed
once product water has been produced.
Check that the REGULATE PRODUCT flow valve (3, fig. 2-64) is fully open.
You are now ready for full operation under normal circumstances. A few more
adjustments are required while you produce water and store it in tanks for future
Slowly close VENT VESSELS valve located behind VENT VESSELS outlet. This allows filtered
water to enter R.O. vessels.