Table 3-2. Operator Troubleshooting (ROWPU) - cont.
TEST OR INSPECTION
PRODUCT WATER TOTAL DISSOLVED SOLIDS (TDS) LEVEL IS ABOVE 1000 PPM cont.
Remove the R.O. elements from the pressure vessel (para. 3-4). Check condition, lubrication, and size of
all preformed packings and installation of end connectors. Replace damaged or wrong-size preformed
packing(s), lubricating preformed packings with lubricant found in Storage chest No. 2 before installation.
Carefully install elements and end caps (para. 3-4).
Adjust product water flow for 6-12 gpm (not to exceed 960 psi for saltwater) up to 16 gpm (not to
exceed 500 psi for fresh/brackish water).
For each R.O. vessel in which preformed packings were inspected, collect a sample of product water
from each end of vessel, rinsing container three times with sample water before collecting sample. Do
one vessel at a time. Record sample as front or rear sample.
Measure TDS of each product water sample (para. 2-15c(5). If one or both samples are still high,
leaky preformed packing or faulty (cracked) connectors may still be present, or one or both R.O.
elements may be faulty. Depending upon availability of time, either repeat steps a through h, or
replace the elements (para. 3-4).
Resume normal operation.
Step 2. R.O. elements may be scaled or fouled.
Clean R.O. elements (para. 2-13).