Installation and Service Manual – L Series Reverse Osmosis System
Systems and Components
Membranes
,
Filters
,
Chemicals
2325 Cousteau Ct., Vista, CA 92081 USA • www.appliedmembranes.com • E-mail: [email protected]
Page 22
Copyright © 2008 Applied Membranes, Inc. All Rights Reserved.
System Maintenance
Maintain proper operating conditions.
(See section: “Design Basis” on pages 3-4)
Sediment Pre-Filter Cartridge
When to Change Sediment Prefilter Cartridge
Sediment cartridge Filters should be changed regularly to maintain proper pump
pressure and flow. If the pressure drop across the cartridge filter (as indicated by
the differential between the filter inlet and filter outlet pressure gauges) increases
by 10 psi, the cartridge filters should be changed.
Changing Cartridge Filters
1. Turn unit off.
2. Close inlet supply valve.
3. Un-assemble the filter housing (twist the sump counter-clockwise).
4. Remove and inspect the cartridge. Replace as needed.
5. Before replacing housing, insure that O ring seal is lubed and placed in groove
of housing. Inspect seal and replace as needed.
6. Assemble housing (turn the sump clockwise into the cap until tight).
Membrane Cleaning
When to Clean Membranes
In normal operation, the membrane in reverse osmosis elements can become fouled by mineral scale, biological matter,
and grime. These deposits build up during operation until they cause loss in water output or loss of salt rejection, or both.
Elements should be cleaned whenever the water output rate drops by 10 percent from its initial flow rate
(the flow
rate established during the first 24 to 48 hours of operation), or when salt content in the product water rises noticeably.
Note:
Check water temperature and apply temperature correction (page 19) to determine if flow loss
is due to low feedwater temperature. A malfunction in the pretreatment, pressure control or pump can cause
a drop in feedwater delivery pressure, feedwater flow, or product water output, or an increase in salt
passage. If such adjustments are needed, the element may not require cleaning.
Common Foulants and Their Associated Symptoms
Foulant
Symptoms
Solution/Cartridge Part #
Biological
Growth
Element may have strong odor, possible mold growth on scroll end.
Element will likely exhibit low permeate flow, but salt rejection will
usually be as good if not better than original test.
Alkaline Cleaner: AM-22
Cartridge: C-C2520-A22
Carbonate Scale
Usually on tap water or brackish water elements only. The element
may be noticeably heavier than normal. Element will exhibit low
permeate flow and poor salt rejection.
Acid Cleaner: AM-11
Cartridge: C-C2520-A11
Iron Fouling
Rust coloring seen on end of scroll. Possibly some large rust flakes
from iron plumbing. Element will exhibit low permeate flow and poor
salt rejection. Rust colored reject water may be seen on start of
baseline test
Acid Cleaner: AM-11
Cartridge: C-C2520-A11
