Spectra Watermakers LB-1800C, Installation And Operating Manual

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MB - 5 MEMBRANE CLEANING WITH DETERGENT
If the membrane has been fouled with oil it may be possible to save it by cleaning with
dish soap such as Joy. Do not use anything that contains bleach. You will need a lot
of chlorine free fresh water so either use unchlorinated product water of get a carbon
filter that will handle 6 gpm (23 lpm)
Use the “ Membrane Cleaning Procedure ”
Fill a bucket with fresh water and mix in a couple squirts of the detergent. Run the sys-
tem unpressurized (with pressure relief valve open) with the watermaker drawing water
from the bucket and discharging to an acceptable drain site. When about half the water
is gone from the bucket stop the unit and let the membrane soak for a few minutes.
Restart and pump the remaining solution overboard. Repeat until the discharge ap-
pears clean.
After most of the oil is cleaned out you can put the brine discharge into the bucket and
run the system with the soapy water circulating as you would for the other cleaning
chemicals. Run the Fresh Water Flush cycle to clean membrane, then flush for twenty
minutes using feed water. Pressurize and test.