Atlas Copco GA 110 VSD+ Instruction Book page 74

In case water is not in line with recommended values or if any doubt, please refer to Atlas Copco.
Technical specifications
Parameter
1 pH
2 Conductivity
3 Total Dissolved
Solids
4 Ca-hardness
5 Total Alkalinity
6 Ryznar Stability
Index (RSI)
7 Chlorine
8 Chlorides
9 Nitrates
10 Sulphates
11 Chemical
Corrosion Index
12 Iron
13 Manganese
14 Copper
15 Ammonium
16 Suspended
Solids (max
10µ)
17 Oil or Grease
18 Biology
Remarks on the technical specifications
Parameter
1 pH
2 Conductivity
6 Ryznar Stability Index (RSI) Recommended actions : see table for RSI
7 Chlorine
8 Chlorides
72
Unit Single Pass
(65°C /
149°F)
6.8 - 9.3
µS / cm < 1500
mg / L TDS to be measured for calculating RSI.
ppm < 500
CaCO
3
ppm No limits indicated. To be measured for calculating RSI.
CaCO
3
5.6 - 7.5
ppm < 0.5
ppm < 500 (*)
ppm No limits indicated. To be measured for calculating RSI.
ppm < 1000
< 5
ppm < 1
ppm < 0.2
ppm < 1
ppm < 0.5
ppm < 10
ppm < 1
CFU / 5
< 10
mL
Remarks
For stainless steel systems without other materials, pH can be
down to 6.
For closed loop systems, higher pH values are possible
Conductivity and TDS linked with conversion factor (theoretical
factor possible, but practical determination recommended at
least once)
or shock treatment max. 2 ppm for 30 min/day
(*) Limit 200 ppm applicable when RSI < 5.6 or RSI > 7.5
Single Pass Recirculating
(95°C / (65°C / 149°F)
203°F)
6.8 - 9.3 6.8 - 9.3
< 600 < 4000
< 2 < 500
N.A. 5.6 - 7.5
— < 0.5
< 100 < 500 (*)
< 200 < 1000
< 1 < 5
< 0.2 < 1
< 0.05 < 0.2
< 0.2 < 1
< 0.5 < 0.5
< 1 < 10
< 1 < 1
3 5
< 10 < 10
Instruction book
Closed Closed
System System
(65°C / (95°C /
149°F) 203°F)
7.5 - 9.3 7.5 - 9.3
< 1500 50 - 600
< 1000 < 50
5.6 - 7.5 5.6 - 7.5
— —
< 500 (*) < 100
< 400 < 200
< 1 < 1
< 1 < 0.2
< 0.2 < 0.05
< 1 < 0.2
< 0.5 < 0.5
< 10 < 1
< 1 < 1
3 3
< 10 < 10
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