AmeriWater MRO2X, Operation & Maintenance Manual

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MRO2X
– 5X Manual
- 21 -
98-0058
Rev. R
PRODUCT WATER hose connection. After each container of PAA solution is drawn into
the MRO, then the MRO must be stopped without delay, and each water outlet must be
tested for PAA at the minimum amount. Continuing to run the MRO after all the PAA
solution is drawn out of the PAA container will only result with diluting the strength of the
PAA, which reduces the disinfecting capability.
If the PAA at each water outlet has not been found to be positive at the minimum
required amount, another container must be drawn into MRO, and into the loop, until the
minimum strength is tested and verified using a PAA test strip. If the minimum required
level of PAA cannot be achieved after a reasonable number of volumes from the PAA
container (usually around 5, or determined by your facility manager)
, refer to the “large”
loop disinfection procedure outlined in the following section.
UNTIL THE PAA IS FOUND TO BE POSITIVE AT EACH WATER OUTLET TEST
POINT AT 0.5% MINIMUM, THE LOOP SYSTEM CANNOT BE RELIABLY
DISINFECTED.
WARNING: DO NOT RECIRCULATE THE PAA SOLUTION FROM THE LOOP THROUGH
THE MRO AND THEN, BACK INTO THE LOOP USING THE “CIP” SWITCH IN
THE “ON” POSITION WHEN THE MRO IS IN THE “DISINFECTION” MODE.
17.
Label the MRO with appropriate WARNING signs (Example: “DO NOT USE /
CON
TAINS DISINFECTANT”).
18.
Leave the MRO in the DISINFECT ENABLED mode, and allow the PAA solution to soak
for 60 minutes within the MRO (and the loop, if connected to one).
WARNING: Soaking longer than twelve hours may cause damage to the membrane.
19.
Record the Start and Stop times on the Log to have a record of how long the membrane
soaked in PAA disinfecting solution.
20. After the required soak time is achieved in the DISINFECT mode, flush the residual PAA
from the disinfectant draw plumbing
a. Rinse and fill the PAA Container to the red line with dechlorinated water from the
Incoming Tap Water Test Port and connect the PAA tubing to the PAA connection on
the front of the RO+.
b. Press and hold the LEFT ARROW key and then, press the RIGHT ARROW key. This
will access the DISINFECT MODE. The controller display will show DISINFECT
ENABLED and the keys can be released.
c. Press and hold the ENTER key to turn on the Disinfect Draw function and THE
DISPLAY WILL READ DISINFECT ENABLED DRAW . Continue to hold the ENTER
key, until all of the water is drawn in and you begin to see air bubbles in the draw tube.
This will flush out any residual PAA left in the injection plumbing.