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16
REMEDIES
Refer to Section 2.9 for proper-
ly setting concentrate and
recycle valves
See above.
Check the water temperature.
If needed, install a hot/cold
tempering valve. Permeate
production rate is dependent on
77°F (25°C). Refer to Section
2.5 (Temperature Correction
Factor).
Refer to Section 2.18 for cor-
rect membrane element
installation procedure.
Membrane elements with
damaged brine seals may be
returned for repair. For low
permeate production, it is
wise to test the permeate pro-
duction of each membrane
element.
Refer to Section 2.18 for cor-
rect membrane element
installation.
Flush and/or clean the
machine.
Reduce permeate line back-
pressure. Check for restric-
tions in permeate plumbing.
POSSIBLE CAUSES
Concentrate or recycle valve to
far open
Low operating pressure
Machine operating on cold
water
Membrane elements installed
incorrectly
Brine seal has “rolled” or been
damaged
Dirty or fouled membrane
elements
Backpressure on the permeate
line
PROBLEM
Low operating pressure
(continued)
Low permeate production
.
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