Technical data

/08.2011/18/16
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. 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
6.2 Water piping connection
Connection with external
thread
For connecting the unit to the external system remove the protective caps or sealing
disks of the screwed connections.
Water remaining from the test run may escape when the protective
caps are removed.
The water connections end with an external thread. Screw the lines of the external
system to the lines of the unit respecting the designation at the unit.
Insulate the water pipes with the diffusion tight insulating material, to prevent the
introduction of ambient air heat and the formation of condensate at the pipes.
Fill and bleed air from the cooling water circuit by means of the filling connections
and the schrader valves for bleeding (see refrigerant diagram).