American Dryer Corp. AD-840 - Manual (Page 33)

American Dispensing Company 88 Currant Road / Fall River, MA 02720-4781
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12.Shut off main water valve. Remove and save the extended length 3/8” OD tubing for future cleanings.
Reattach the original 3/8” OD tubing to the sampling valve cluster. Open main water valve.
13.Reset the microprocessor.
14.Wait 24 to 48 hours and measure the base flow rate of the cleaned membrane as detailed in steps 1
through 5 of section A (pages 24 to 25). The new base flow should be similar to the original one. If
not, alkaline cleaning should be performed. The procedure for alkaline cleaning is the same as for acid
cleaning except an alkaline cleaning cartridge is used instead.
C. STORAGE AND SHIPPING OF MEMBRANE
ATTENTION: IF THE MEMBRANE IS TO BE SHIPPED OR IF THE MACHINE IS TO
BE LEFT IDLE FOR FIVE DAYS OR MORE, PRESERVATIVES MUST
BE ADDED TO THE R.O. MEMBRANE TO KEEP IT MOIST AND FREE
FROM BACTERIAL GROWTH.
WARNING: CHLORINE WILL IRREPARABLY DAMAGE THE R.O. MEMBRANE.
1. Vend six gallons of water into a container for mixing the preservative solution. Remember this water
is going into the R.O. Membrane and cannot contain chlorine. Water from the sampling valve AFTER
the carbon filter is also acceptable.
WARNING: OBSERVE ALL RELEVANT PRECAUTIONS WHEN HANDLING
CHEMICALS. WEAR PROTECTIVE CLOTHING, GLOVES AND EYE
PROTECTION.
2. Disconnect electrical power to the machine.
3. Shut off main water valve at the inlet of the machine.
4. Relieve pressure in the system by opening the sampling valve after the carbon filter. Close it after flow
stops.
5. Disconnect 1/2” O.D. tubing at the outlet of the R.O. Pump (diagram 13) and at the inlet of the back
pressure regulator (diagram 14). Disconnect the tubing by depressing the ring on the fitting and then
pulling at the tubing. Water will begin to flow out from the bottom tubing. Drain the R.O. Housing of
water.
6. Fill membrane and housing with a 2% by weight of food grade sodium bisfulfite solution. In months
when there is a possibility of freezing, add 20% by weight of glycerine to the solution. This is the
equivalent of 2.7 ounces of sodium bisulfite and 27 fluid oz. of glycerine for every gallon of water.