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]
Copyright © 2008 Applied Membranes, Inc. All Rights Reserved.
Page 19
System Operation Temperature
The water temperature is one of the key factors in the performance of the reverse osmosis membrane element. A higher
temperature will result in more product flow and a lower temperature will result in less product flow.
All reverse osmosis membrane elements and systems are rated at 77° Fahrenheit (25° Celsius).
To find the membrane permeate rate at a different temperature, follow these steps:
Find the temperature correction factor (TCF) from the below table. Divide the rated permeate flow at 77° Fahrenheit by
the temperature correction factor. The result is the permeate flow at the desired temperature.
Feed Water Temperature
TCF for
Thin Film
C º
Fº
1
33.8
3.64
2 35.6
3.23
3
37.4
3.03
4 39.2
2.78
5
41
2.58
6 42.8
2.38
7
44.6
2.22
8 46.4
2.11
9
48.2
2.00
10 50
1.89
11
51.8
1.78
12 53.6
1.68
13
55.4
1.61
14 57.2
1.54
15
59
1.47
16 60.8
1.39
17
62.6
1.34
Feed Water Temperature
TCF for
Thin Film
C º
Fº
18
64.4
1.29
19
66.2
1.24
20
68
1.19
21
69.8
1.15
22
71.6
1.11
23
73.4
1.08
24
75.2
1.04
25
77
1.00
26
78.8
0.97
27
80.6
0.94
28
82.4
0.91
29
84.2
0.88
30
86
0.85
31
87.8
0.83
32
89.6
0.80
33
91.4
0.77
34
93.2
0.75
Feed Water Temperature
TCF for
Thin Film
C º
Fº
35
95
0.73
36 96.8
0.71
37
98.4
0.69
38 100.4
0.67
39
102.2
0.65
40 104
0.63
41
105.8
0.61
42 107.6
0.60
43
109.4
0.58
44 111.2
0.56
45
113
0.54
46 114.8
0.53
47
116.6
0.51
48 118.4
0.49
49
120.2
0.47
50 122
0.46
Troubleshooting
General Troubleshooting
PROBLEM
POSSIBLE CAUSE
SOLUTION
Inlet pressure low
Low supply pressure
Correct incoming supply pressure
Cartridge filters plugged
Change filters
Solenoid valve malfunction
Replace solenoid valve and/or coil
Permeate flow low
Low water temperature
Adjust water temperature
Low system pressure
Adjust control valve
Membranes fouled
Clean membranes
Pump noisy
Low inlet flow
See “Inlet pressure low”
Permeate quality poor
Low inlet flow
Adjust control valve
Low system pressure
See above
Recovery too high
Reduce recovery
Membranes fouled
Clean membranes
Membranes damaged
Replace membranes
Feed pressure present, even
after tank full
Solenoid malfunction
Replace solenoid
Coil malfunction
Replace coil
Controller malfunction
Inspect or replace
