5 | Installation
14 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en
5.2.3 Cooling Water Connection
Description
CWI Cooling water inlet CWO Cooling water outlet
PHE Plate heat exchanger
● 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 18
Water pressure bar 1 ... 6
Supply temperature °C +10 ... +30
Required pressure differential across supply
and return
bar ≥ 1
● 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
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