Stulz Mini-Space DX CCD131A, Original Instructions Manual

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/07.2016/ G20
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1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
50%
40%
30%
20%
10%
-10 -8 -6 -4 -2 0 2 4 6 8
EN
External water circuit
To seal the water circuit you must connect the unit to a chilled water ring mains, which contains for the generation of
cold water either a chiller or a dry cooler or cooling tower. Moreover the water circuit must be provided with a pump
and an expansion tank with safety valve to convey the cooling water. If the water quality is insufficient, we recommend
the additional installation of a fine mesh strainer.
For an efficient protection against corrosion, the anti-freezing agent is mostly sufficient, which should be used if
the water temperature passes under 5°C or if the outside temperature is less than 0°C. We recommend to add the
following quantities of ethylenglycol (indicated as percentage of weight of the water quantity) :
water or outside air temperature ethylenglycol
from +5 to -5°C 10%
from -5 to -10°C 20%
from -10 to -15°C 28%
from -15 to -20°C 35%
from -20 to -25°C 40%
average chilled water temperature (°C)
correction coefficient for the pressure
drop in the water circuit when using
ethylenglycol
6.3.2 Water piping
Recommendation for Condenser Water Systems
On new or renovated condenser water systems, ensure that the external pipework is thoroughly flushed, to remove
construction debris and other particulate matter, before connecting to the new Stulz cooling units. A strainer should
be fitted at the unit inlet, to protect the heat exchangers from fouling and possible blockage.
The strainer should have a mesh size of 0.5 mm. Be aware that any fouling or blockage of the heat exchanger result
in a reduced water flow, loss of efficiency, possible damage to the heat exchanger and subsequent unit failure.