Operating instructions

Data Value Unit
Hydrogen carbonate [HCO
3
-
] / Sul-
phates [SO
4
2-
]
> 1.0
Water hardness (alkaline earth ions
content)
0.71 - 1.52 mmol/L
Hydrogen carbonate [HCO
3
-
]
70 – 300 mg/L
Conductivity 10 - 500 μs/cm
Chlorides (Cl
-
)
< 50 mg/L
Sulphite (SO
3
2-
)
< 1 mg/L
Free chlorine gas (Cl
2
) < 1 mg/L
Nitrates (NO
3
-
)
< 100 mg/L
Ammonia (NH
3
) < 2 mg/L
Iron (Fe), dissolved < 0.2 mg/L
Manganese (Mn), dissolved < 0.1 mg/L
Aluminium (Al), dissolved < 0.2 mg/L
Free, aggressive carbonic acid (CO
2
) < 5 mg/L
Hydrogen sulphide (H
2
S) < 0.05 mg/L
Algae growth not permitted
Suspended matter not permitted
4.4.2 Connecting cooling water
Specification Value
Maximum cooling water
pressure
10 bar
Differential pressure
cooling water rp
1 ... 6 bar VC 1200 W and VC 2000 W
3 ... 6 bar VC 3000 W and greater
Cooling water tem-
perature
approx. 15 °C recommended,
10 ... 30 °C permissible (with perform-
ance limitations)
Note the following:
 Fix the cooling water tubes in place using hose clamps.
 Fix the supply tube of the water cooling in place in the sink
area to prevent uncontrolled sliding, also in the event of pres-
sure surges.
Fix the supply tube of the water cooling in place in the sink
area so that spraying out of hot cooling water is not possible.
Before commissioning
Variocool 28