Installation | 5
Instruction Manual COBRA NX 0950 A WCV_EN_en
15 | 44
5.2.3
Cooling Water Connection
CWI
CWO
Description
CWI
Cooling water inlet
CWO
Cooling water outlet
●
Connect the cooling water connections (CWI / CWO) to the water supply.
Connection size:
– G1/2, ISO 228-1 (CWI / CWO)
●
Make sure that the cooling water complies with the following requirements:
Supply capacity
l/min
8 ... 16
Water pressure
bar
1 ... 6
Supply temperature
°C
+10 ... +30
Required pressure differential across supply
and return
bar
≥
1
Cooling water supply temperature in Fahrenheit degrees:
– +50 … +86 °F
●
To reduce the maintenance effort and ensure a long product lifetime we recommend the follow-
ing cooling water quality:
Hardness
mg/l (ppm)
< 90
Properties
Clean & clear
PH value
7 ... 8
Particle size
µm
< 200
Chloride
mg/l
< 100
Electrical conductivity
µS/cm
≤
100
Free chloride
mg/l
< 0.3
Materials in contact with the cooling water
Stainless steel and cast iron
