the unit will be secured for more than 14 days. Although they do not attack the
membranes or other system components directly, high concentrations of biological
matter can block enough of the product water channels to cause a reduction of as
much as 40% of the total system capacity.
CAUTION
Failure to follow the extended shutdown procedure can result in
irreversible fouling to the RO membranes.
Bacterial contamination can be avoided by following the following procedures:
Flush the system 2 - 4 minutes every two weeks.
5.0
MAINTENANCE INSTRUCTIONS
5.1
GENERAL
The service life of most of the system equipment is directly related to the feed water
inlet conditions. Improper maintenance will also significantly reduce the life
expectancy of the major unit components (such as the membranes, filters and
pumps) as well as the reliability of the unit. Under normal conditions, and with
proper maintenance, a reverse osmosis membrane (which is the major
consumable item) should have an effective service life somewhere between 1 to 2
years with heavy use.
D
a
ily
W
e
e
k
ly
M
o
n
th
ly
Q
u
a
rt
e
rl
y
S
e
m
i-
A
n
n
u
a
lly
A
n
n
u
a
lly
A
s
R
e
q
u
ir
e
d
L
a
b
o
r
H
o
u
rs
(a
p
p
ro
x
im
a
te
)
Replace filter(s)
•
0.5
Replace membranes
•
2.0
Table 5.0 - Maintenance Task Chart
5.2
FILTER ELEMENT CLEANING OR REPLACEMENT
The filter elements should be replaced when the Feed Pressure Gauge PI-20 drops
below 5 psi.
