GE OSMONICS MILLENIUMTM REVERSE OSMOSIS UNIT - Manual (Page 50)

M Millenium™ RO System by GE Osmonics
14693e - 31 Mar 03 4- 13 Routine Maintenance
output after the dwell time.
6. Place the waste hose back in the cleaning solution container.
7. Using the disinfect switch, turn the RO on and operate it for five minutes.
8. Remove the product and waste hoses from the cleaning solution tank and place
them in the drain.
4.3.1.3 Post-Cleaning Rinse Procedure
1. Using the disinfect switch, turn the RO on and run cleaning solution to the drain
until the container is empty. This aids in emptying the container of cleaning
solution.
CAUTION:
DO NOT ALLOW THE PUMP TO RUN DRY. As an alternative, the solution
may be poured in the drain.
2. Rinse and drain the cleaning solution tank and the hoses then let them air dry.
3. Disconnect the disinfect hose from the RO.
4. Ensure that the water supply to the RO unit is on. If it is partially closed, rotate
the operate/flush valve to the full flush position.
5. Place the inlet water valve switch in the on position. Let water flow to the drain
for one minute.
6. Rotate the operate/flush valve to the operate position.
7. Set the RO pump power switch in the ON position. Rinse for 20 minutes with the
Operate/Flush valve in the Operate position until the % rejection and TDS
monitors’ displays normalize (e.g. 'usual' % rejection and 'usual' TDS reading).
Refer to your operating log for 'usual' readings and compare to the pre-cleaning
values.
A. During this rinse period, rotate the Operate/Flush valve to the
Flush position briefly and then back to Operate three times to
build-up and release pump pressure. This aids in flushing the
cleaner from the system.
8. Test the product water for post-cleaning pH and compare it to the pre-cleaning pH
level. The values should be the same or very close to the pre-cleaning pH. If it is
not, continue rinsing in the Operate position until equalization of the value occurs.
9. When all of the parameters (% Rejection, TDS, pH) have normalized, operate the
RO for an additional 20 minutes in rinse mode.
10. Repeat the cleaning procedure with the other pH cleaner. GE Osmonics
recommends using a low pH cleaner first, followed by a high pH cleaner after
rinsing thoroughly.