TM 10-4610-241-10
TO 40W4-13-41
2-13. R.O. ELEMENT CLEANING PROCEDURE - cont.
NOTE
b.
Chlorine residual should be 5 ppm unless otherwise directed by medical personnel.
(39)
When chlorine residual and pH are within required limits, place product water line in product
water tank (figure 2-72).
(40)
Continue normal operating procedures (para. 2-9).
Surfactant (Detergent) Method.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
Perform steps (1) thru (7) in paragraph 2-13a.
Using 1000 ml graduated cylinder, measure 2160 ml of surfactant and pour into backwash tank.
Using telescopic aluminum paddle, stir solution in backwash tank.
Perform steps (9) thru (28) in paragraph 2-13a.
Operate ROWPU until suds are no longer coming out of brine hose.
Adjust REGULATE PRODUCT FLOW valve (1, figure 2-74) until PRODUCT WATER FLOW
gage (10) indicates under 16 gpm (fresh/brackish water) or 12 gpm (seawater), and R.O.
PRESSURE PSI gage indicates under 500 (fresh/brackish water) or 960 (seawater).
Close VENT PRODUCT WATER valve (7, figure 2-46).
Allow ROWPU to operate until suds are no longer coming out of product water hose.
Check product water TDS.
Only after obtaining TDS level under 1000 ppm, turn CHLORINE PRIME/RUN valve
(figure 2-60) to RUN.
Wait 5 minutes, then perform chlorine residual and pH test (para. 2-15b).
NOTE
Chlorine residual should be 5 ppm unless otherwise directed by medical personnel.
(11)
When chlorine residual and pH are within required limits, place product water line in product
water tank (figure 2-72).
(12)
Continue normal operating procedures (para. 2-9).
2-119
