NANO VDR 2600, Instruction Book, Page: 76 / 96

RSI
Chlorid
e limit
Water condition
Maximum 65°C /
149°F Maximum 95°C /
203 °F
9.1<RSI<11
200
ppm
Very strong corrosion
Regular control
necessary.
Avoid interruption of
operation Regular control
necessary.
Avoid interruption of
operation
RSI>11
200
ppm
Very strong corrosion
Regular control
necessary.
Avoid interruption of
operation Regular control
necessary.
Avoid interruption of
operation
Table 3: Single Pass system
RSI
Chloride
limit
Water condition Maximum 65°C / 149°F
RSI<3.9 200 ppm Very high scale formation Water cannot be used.
4.0<RSI<5.5 200 ppm High scale formation
Regular control and
descaling operation
necessary.
Not recommended for plate
heat exchangers
5.6<RSI<6.2 350 ppm Slight scale formation
Water treatment not
necessary.
Occasional inspection
recommended.
6.3<RSI<6.8 500 ppm Neutral water
Water treatment not
necessary.
Occasional inspection
recommended.
6.9<RSI<7.5 350 ppm Slight corrosion
Water treatment not
necessary.
Occasional inspection
recommended.
7.6<RSI<9.0 200 ppm Strong corrosion
Regular control necessary.
Use of corrosion inhibitor
recommended
9.1<RSI<11 200 ppm Very strong corrosion
Regular control necessary.
Use of corrosion inhibitor
recommended
RSI>11 200 ppm Very strong corrosion Water cannot be used.
Table 4: Recirculating system, with cooling tower
RSI
Chloride
limit
Water condition
Maximum 65°C / 149°F
and 95°C / 203°F
RSI<3.9 200 ppm Very high scale formation Water cannot be used.
4.0<RSI<5.5 200 ppm High scale formation
Treat water to reduce
scaling character
Instruction book
74 2987 2020 00