11
Flow Rates - check the product and concentrate flow rates to determine any change from the normal
conditions. Adjust the flows and pressures if necessary to maintain the proper settings. If the pump
pressure is 190 PSI and the recovery rate is too low, the membrane may be fouled and require
cleaning.
Recovery Rates - If the TDS level climbs or an odor develops, measure the amount of water coming
out from the concentrate line, and then do the same for the product water line. The difference in
concentrate to product should be approximately 5 to 1. If the ratio needs to be adjusted, it can be
done by using the adjusting screw on the pump.
NOTE 1 -
Under no conditions should you allow the membrane to dry out. Always keep moisture in the
RO membrane assembly, and always keep the ends plugged (Use threaded plugs being careful not to
over tighten, as a cracked end plug may result). If freezing weather conditions exist, drain the water from
the RO membrane assembly and plug the holes before shipping.
NOTE 2 -
For the most accurate TDS readings, let the RO unit run for at least 15 minutes.
NOTE 3 -
For the warranty to be valid, activated carbon must be used to remove the chlorine from the
water supply. Use a chlorine test kit to determine if any chlorine is in the reject water. If it is, replace the
activated carbon tank or cartridge. If chlorine passes even with a new carbon filter, you need to get a
larger one with greater capacity for chlorine removal.
If you find yourself cleaning the system frequently, a change in the feedwater chemistry may be the cause.
Only a detailed water analysis can determine the likely cause of membrane fouling. Consult your water
retailer or consult the XYLEM WET service department for information and pricing for membrane cleaning
and/or water analysis services.
DO NOT return the RO unit to XYLEM WET without first obtaining Return Merchandise
Authorization(RMA). Company will not be responsible for equipment, supplies, or materials returned
without an RMA. All shipments should be properly insured.
Summary of Contents for CAK Series
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