3030226 Rev. D 5-6 Routine Maintenance
5.1.5 Annual Maintenance
1. An AAMI or CSA Water Quality Analysis of the product water should be
conducted at least yearly. (Refer to the “Water Quality Analysis Procedure” in
Chapter Two.)
Test RO feed water (tap water). Test for:
a. Iron presence (critical when a PAA based sanitizer is used)
b. pH alteration
c. Chlorine/chloramines shifts
d. Hardness fluctuations
CAUTION:
If RO feed water changes in its constituents, the pretreatment components may
need to be reassessed for proper capacity.
2. Check the tubing and fittings for leaks or wear.
3. Check all pre RO devices for correct operation.
5.1.6 As Required
1. Low pH chemical cleaning
a. Should be performed if the rejection rate has decreased by more than
5% from the initial value.
b. Should be performed if sufficient output flow is not obtained.
c. Should be performed as a preventive measure when a softener is not
used.
d. Should be performed as a method to remove transitional metals from
the RO membrane prior to chemical sanitization.
2. High pH chemical cleaning
a. Should be performed if organic fouling is suspected.
b. Should be performed if the rejection rate has decreased by more than
5% from the initial value and low pH cleaning has not helped to improve
product water flow.
3. Chemically sanitize the RO with MINNCARE HD. Refer to the Chemical
Sanitization Procedure in this chapter.
To Next Page
Loading...
