GE F-801 - Manual (Page 55)

F-801 Internal RO System by GE Osmonics
12552e – 27 Feb 04 4- 15 Routine Maintenance
6. Ensure that the water supply to the RO unit is on. If it is partially closed, rotate
the dialyze/flush valve to the full flush position.
7. Turn ON the F-801 RO unit and operate in the flush mode for 5-10 minutes.
This will aid in rinsing the system quickly.
CAUTION:
Some pump noise (chattering) is normal in the flush position. Excessive pump
noise (chattering) can be damaging to the pump. The RO is in “flush” from the
full open (flush) position to just before the fully closed (dialyze) position. Adjust
it by partly closing the flush valve to reduce chattering of the pump.
8. Rotate the dialyze/flush valve to the dialyze position.
9. Turn the F-801 RO unit ON. Rinse for 20 minutes with the Dialyze/Flush valve
in the Dialyze 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 Dialyze/Flush valve to the
Flush position briefly and then back to Dialyze three times to
build-up and release pump pressure. This aids in flushing the
cleaner from the system.
10. 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 Dialyze position until equalization of the
value occurs.
11. When all of the parameters (% Rejection, TDS, pH) have normalized, operate
the RO for an additional 20 minutes in rinse mode.
NOTE:
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.
12. Turn the F-801 RO unit OFF.
13. Close the product valve and then disconnect the clear accessory flush tubing
from the product line (white QD / valve) and store properly. Reconnect the
product line to its original connection and open the product valve.
14. Remove the “Do Not Use/Contains Cleaner” warning label.
CAUTION:
The F-801 RO unit must be disinfected after the cleaning procedure.