Total
dissolved
solids
(mg/l)
A
Temperature
(°C)
B
Ca hardness
(ppm CaCO
3
)
C
M-Alkalinity
(ppm CaCO
3
)
D
86 - 91
0.7
356 - 446
2.2
356 - 446
2.6
92 - 95
0.6
447 - 563
2.3
447 - 563
2.7
564 - 707
2.4
564 - 707
2.8
708 - 892
2.5
708 - 892
2.9
893 - 1000
2.6
893 - 1000
3.0
Interpretation of the values obtained:
• RSI < 6: boiler scale formation
• 6 < RSI < 7: neutral water
• RSI > 7: corrosive water
As a general rule, the RSI index should be between 5.6 and 7.5. If that is not the case, contact
a specialist.
5.
Free chlorine (Cl
2
)
Disinfecting with chlorine is
not done in closed systems, neither in energy recovery systems
.
A continuous level of 0.5 ppm should not be exceeded. For shock treatments, a maximum limit of 2 ppm
for maximum 30 minutes/day applies.
6.
Chlorides (Cl
-
)
Chloride ions will create pitting corrosion on stainless steel. Their concentration should be limited,
depending from the RSI value.
RSI < 5.5
5.6 < RSI < 6.2
6.3 < RSI < 6.8
6.9 < RSI < 7.5
7.6 < RSI
Cl
-
(ppm)
200
350
500
350
200
For energy recovery systems, the limit is 100 ppm.
7.
Sulphates (SO
4
2-
)
Sulphate (ppm)
Type of cooling system
Standard
Energy recovery
Single pass
< 1000
< 200
Recirculating (with tower)
< 1000
not applicable
Closed loop
< 400
< 200
8.
Iron and Manganese
Dissolved iron (ppm)
Dissolved manganese (ppm)
Type of cooling
system
Standard
Energy recovery
Standard
Energy recovery
Single pass
< 1
< 0.2
< 0.2
< 0.05
Recirculating (with
tower)
<
1
not applicable
<
0.2
not applicable
Closed loop
< 1
< 0.2
< 0.2
< 0.05
Instruction book
2920 1796 01
73
Summary of Contents for CPF 270
Page 1: ...CPF 270 CPF 340 Instruction book ...
Page 2: ......
Page 61: ...Instruction book 2920 1796 01 59 ...
Page 93: ...Vent filler and drain plugs on air cooled compressors Instruction book 2920 1796 01 91 ...
Page 120: ......
Page 121: ......
Page 122: ...No 2920 1796 01 2013 02 ...
