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Water Quality
- In order to protect the package components in contact with the cooling water against
attack by corrosive and fouling agents, we recommend that the cooling water meet the following quality
standards
Total Dissolved Solids (TDS)..................
<500 ppm
Iron.......................................................
<2 ppm
Total Hardness......................................
<60 ppm
Silica ....................................................
<25 ppm
Oil and Grease......................................
<5 ppm
Sulfate..................................................
<50 ppm
Chloride................................................
<50 ppm
Nitrate...................................................
<2 ppm
Corrosivity.............................................
Langelier Index between 0 to 1
Unlike the internal injection water system, the cooling water system does not have any form of filtration or
treatment. It is the responsibility of the end user to ensure that cooling water of adequate quality is used.
The water quality tests described in the “RO Water Filtration System”, SECTION 8, may also be used to
monitor the quality of the cooling water.
Water Flow Requirements
- The following conditions of service are recommended to achieve adequate
cooler core performance:
Water Cooler
Pressure
40 HP
50 HP
60 HP
Water flow for 30
°
F rise (gpm....................................
All
7.2
8.9
10.6
Water Flow for 15
°
F rise (gpm) .................................
All
14.4
17.9
21.3
Maximum water flow and pressure loss (gpm @ psi) ...
All
-------
55 @ 12.6
-------
Operating pressure range (psi) ..................................
All
-------
40 to 150
-------
Operating temperature range (
°
F) .............................
All
-------
60 to 90
-------
Aftercooler
Water flow for 30
°
F rise (gpm....................................
All
0.5
0.7
0.9
Water Flow for 15
°
F rise (gpm) .................................
All
1.1
1.4
1.9
Maximum water flow and pressure loss (gpm @ psi) ...
All
-------
55 @ 10.7
-------
Operating pressure range (psi) ..................................
All
-------
40 to 150
-------
Operating temperature range (
°
F) .............................
All
-------
60 to 90
-------
Notes:
•
Estimate of core pressure drop at lower than maximum flowrate = (GPM/GPM max.).
•
Flows exceeding maximum rate will cause severe erosion and will void unit warranty.
•
Water temperature below 60
°
F may:
-
produce excessive cooling and condensate formation, overtaxing the separation
device and allowing water carryover into the customer pipe works.
-
result in low water velocities (e.g., to check cooling rate) which promote tube
fouling.
•
Water temperature above 90
°
F may cause recurring high discharge temperature
shutdowns.
Summary of Contents for PUREAIR EWD99E
Page 7: ...13 11 608 Page 2 Figure 1 2 PACKAGE ILLUSTRATION AIR COOLED 302EWD797 A Ref Drawing...
Page 8: ...13 11 608 Page 3 Figure 1 3 PACKAGE ILLUSTRATION WATER COOLED 303EWD797 A Ref Drawing...
Page 9: ...13 11 608 Page 4 Figure 1 4 WATER COOLED SCHEMATIC 300EWD797 D Ref Drawing...
Page 10: ...13 11 608 Page 5 Figure 1 5 AIR COOLED SCHEMATIC 301EWD797 D Ref Drawing...
Page 30: ...13 11 608 Page 25 Figure 4 2 FLOW CHART FOR SETUP PROGRAMMING 300EWC1255 Ref Drawing...
Page 44: ...13 11 608 Page 39 301EWD546 B Ref Drawing Page 2 of 2...
Page 46: ...13 11 608 Page 41 302EWD546 B Ref Drawing Page 2 of 2...
Page 48: ...13 11 608 Page 43 303EWD546 B Ref Drawing Page 2 of 2...