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We reserve the right to make changes without any prior notice.Translation from original instructions
2.2.6 Operationwithwatertotheevaporatoratlowtemperature
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 qualied 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.
2.2.7 Operationinheatpumpmodewithlowtemperaturewater
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 modications.
If required, please contact our company.
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