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We reserve the right to make changes without any prior notice.
Translation from original instructions
2.2.6 Operation with water to the evaporator at low temperature
With temperatures below 5°C, it is mandatory to work with water and anti-freeze mixtures, and also change the safety devi-
ces (anti-freeze, etc.), which must be carried out by qualified authorised personnel or by the manufacturer.
The glycol percentage by weight is determined based on the desired temperature of the chilled water (see table).
Minimum ambient temperature or liquid
outlet temperature (°C)
0
-5
-10
-15
-20
-25
-30
-35
-40
Freezing point (°C)
-5
-10
-15
-20
-25
-30
-35
-40
-45
Antifreeze
% by weight
Ethylene glycol
6
22
30
36
41
46
50
53
56
Propylene glycol
15
25
33
39
44
48
51
54
57
If ambient temperatures are expected to be lower than the freezing point of water, it is essential to use an-
ti-freeze mixtures in the above-mentioned percentages.
In the case of units with pump units applied in systems with glycol percentages above 30%, when ordering,
a request must be made for a technical check for compatibility of the pumps and, if necessary, the best so-
lution identified, which could require the use of a specific hydraulic module or the application of pumps with
special electric motors.
2.2.7 Operation with water to the condenser at low temperature
The standard units are not designed to operate with water to the condenser at too low a temperature (refer to the technical
booklet for the limits).
In order to operate below this limit, the unit could require structural modifications.
If required, please contact our company.
