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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)
Freezing point (°C)
Antifreeze
Ethylene glycol
Propylene glycol
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.
2.2.7 Operation in heat pump mode with low temperature water
The standard units are not designed to operate in heat pump mode with water temperatures that are too low (refer to the
Techical Catalogue for the limits).
In order to operate below this limit, the unit could require structural modifications.
If required, please contact our company.
16
Translation from original instructions
0
-5
-10
-5
-10
-15
6
22
30
15
25
33
-15
-20
-25
-20
-25
-30
% by weight
36
41
46
39
44
48
We reserve the right to make changes without any prior notice.
-30
-35
-40
-35
-40
-45
50
53
56
51
54
57
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