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3 OPERATING LIMITS
3.1
STORAGE
The units can be stored within the following environmental conditions:
Min ambient temperature : -10°C
Max ambient temperature : 53°C
Max relative humidity : 95% not condensable
CAUTION: The storage in a very high humidity space (condensation) can damage electronic components.
CAUTION: CCUF units are intended only for indoor usage and storage.
If they are installed in a machinery room they must be installed within the meaning of the EN 378-3 Standard.
Should the unit be stored outdoor it is customer’s duty to implement any device aimed to protect the unit from
the harsh weather effects.
3.2
OPERATING LIMITS
Unit operation is permitted within the limits indicated in the operating map provided in 3.3
CAUTION: The operation outside the limits specified may cause the activation of the protections and disrupt
the operation of the unit and, in extreme cases, damage the unit. In case of doubt, consult the factory. The
operating limits apply to the unit operating at full load.
3.3
OPERATING RANGE
IMPORTANT: A pressure switch cutting directly the power supply to the coils of the compressors contactors prevent
refrigerant from reaching dangerously high pressure values. No safety valve is installed on the unit.
IMPORTANT: If the external air temperature goes below 4 °C and an external hydraulic kit is selected a water antifreeze
protection must be installed at customer care.
When the evaporator water limit temperature is below 0 ° C, the process kit must be selected. When the process kit is
selected, the unit can only work in the "PROCESS" area (below 0 ° C) with a water temperature difference of 5 ° C in the
condenser.
ETHYLENE GLYCOL CORRECTION TABLE
% Ethylene glycol weight
10% 15% 20% 25% 30% 35%
Lowest outlet water temperature
Suggested security limit Cooling capacity
coefficient
Power input coefficient
°C 4 2 0 -2,8 -6 -10
°C 1 -1 -4 -6 -10 -14
- 0,99 0,985 0,981 0,977 0,974 0,971
- 0,993 0,99 0,988 0,986 0,984 0,982
- 1,04 1,05 1,07 1,08 1,09 1,11
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