31
AC fans (Ø 800)
EC fans (Ø 800)
Oversize EC fans (Ø 800)
The indicated values are for the standard machine, without accessories, with AC fans and in any case in the absence of
air recirculation.
Example: supposing you expect there to be obstacles that will generate an estimated aeraulic head loss of 60Pa. In this
case, there are 3 possibilities:
•
use the unit with standard AC fans: compared to ideal conditions, the output power will be reduced by about 5.5%,
the total absorbed power will increase by about 7.5%, the EER will be reduced by about 12.5% and the maximum
allowed external air temperature for operation at 100% will be reduced by about 3.4K compared to the nominal limit
•
use the unit with EC fans: compared to the unit with AC fans working in ideal conditions, the output power will be
reduced by about 5%, the total absorbed power will increase by about 6.5%, the EER will be reduced by about 11.5%
and the maximum allowed external air temperature for operation at 100% will be reduced by about 2.8K compared
to the nominal limit
•
use the unit with oversize EC fans: compared to the unit with AC fans working in ideal conditions, the output power
of the unit will be unchanged, the total absorbed power will increase by about 1%, the EER will be reduced by about
2% and the maximum external air temperature will remain the one shown in the diagram of the operating limits.
It is emphasized that, as indicated in the diagrams and based on the diameter and type of fan, for aeraulic head losses
higher than 60 or 80Pa, only the use of oversize EC fan is allowed.
