NANO VDR 2600, Instruction Book, Page: 73 / 96

• closed loop
Reference Description
(1) Machine
(2) Heat exchanger
(3) Cooling tower
(4) Make up water
(5) Blowdown
(6) Standard Nanospecification
• the application:
• standard (max water temperature 65°C / 149°F at the outlet)
Water quality
A full instruction for handling cooling water data is available at Nano.
In case water is not in line with recommended values or if any doubt, please refer to Nano.
Technical specifications
Parameter Unit
Single Pass
(65°C /
149°F)
Single
Pass
(95°C /
203°F)
Recirculating
(65°C / 149°F)
Closed
System
(65°C /
149°F) Closed
System
(95°C /
203°F)
1 pH 6.8 - 9.3 6.8 - 9.3 6.8 - 9.3 7.5 - 9.3 7.5 - 9.3
2 Conductivity
µS /
cm
< 1500 < 600 < 4000 < 1500 50 - 600
3
Total
Dissolved
Solids
mg / L TDS to be measured for calculating RSI.
4 Ca-hardness
ppm
CaCO
3
< 500 < 2 < 500 < 1000 < 50
5 Total Alkalinity
ppm
CaCO
3
No limits indicated. To be measured for calculating RSI.
6
Ryznar
Stability Index
(RSI)
5.6 - 7.5 N.A. 5.6 - 7.5 5.6 - 7.5 5.6 - 7.5
7 Chlorine ppm < 0.5 — < 0.5 — —
8 Chlorides ppm < 500 (*) < 100 < 500 (*) < 500 (*) < 100
9 Nitrates ppm No limits indicated. To be measured for calculating RSI.
10 Sulphates ppm < 1000 < 200 < 1000 < 400 < 200
11
Chemical
Corrosion
Index
< 5 < 1 < 5 < 1 < 1
Instruction book
2987 2020 00 71